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Corresponding author: Jindřiška Bojková ( bojkova@centrum.cz ) Academic editor: Ben Price
© 2018 Jindřiška Bojková, Pavel Sroka, Tomáš Soldán, Javid Imanpour Namin, Arnold H. Staniczek, Marek Polášek, Ľuboš Hrivniak, Ashgar Abdoli, Roman J. Godunko.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Bojková J, Sroka P, Soldán T, Namin JI, Staniczek AH, Polášek M, Hrivniak Ľ, Abdoli A, Godunko RJ (2018) Initial commented checklist of Iranian mayflies, with new area records and description of Procloeon caspicum sp. n. (Insecta, Ephemeroptera, Baetidae). ZooKeys 749: 87-123. https://doi.org/10.3897/zookeys.749.24104
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An initial checklist of mayflies (Ephemeroptera) of Iran is compiled based on critical review of available literature data, complemented with new data from 38 localities of Gilan and Ardabil provinces. At present, altogether only 46 species and 25 genera are known from Iran, 18 species are reported as new to Iran in this study. Some previously published data are critically evaluated and doubtful taxa are excluded from the list. Basic analysis of the distribution and biogeography of recorded species is given. Procloeon (Pseudocentroptilum) caspicum Sroka, sp. n. is described based on mature larva and egg. Critical differential diagnostic characters distinguishing the species from related taxa are discussed in detail.
aquatic biodiversity, biogeography, faunistic research, Middle East, taxonomy
In comparison to Europe, the mayfly fauna of the Middle East is less known and data from some regions are still fragmentary. Extensive research on mayflies has been mainly focused on the Arabian Peninsula (
Iran, the second largest (more than 1.6 million km²) country of the region after Saudi Arabia, has been studied only occasionally so far. Only 19 species of mayflies have been reported in 16 short taxonomic contributions published in international entomological journals. They include mostly simple faunistic records of species already known from neighbouring countries (
Other sources of information on the mayfly diversity in Iran are some ecological studies on benthic macroinvertebrates over the last decades in order to assess water quality.
As a first step to achieve this ambitious goal, in May 2016 we collected mayflies at 38 localities in the Gilan and Ardabil Provinces in the north western Iran, the areas of presumably high Ephemeroptera diversity. This study represents the first part in a series of contributions aiming to provide a realistic and more complex picture of the Iranian mayfly fauna for future reference. Hence, the objective of the present study is to (i) critically review all mayfly records so far published from Iran with an emphasis on the validity of species occurrence in Iran and status of species from the taxonomic point of view, (ii) provide new data on the occurrence of species in the western part of the Caspian Sea region, and (iii) describe a new species of the genus Procloeon recently found in the studied area.
Mayflies were collected at 38 localities in the Gilan and Ardabil Provinces in 2016 (Fig.
List of localities studied in the Gilan and Ardabil Provinces in May 2016 (RT – right tributary, LT – left tributary).
Stream types | Site no. | Stream name | Stream | Location | Nearest town | Latitude | Longitude | Altitude | Sampling date |
---|---|---|---|---|---|---|---|---|---|
rivers in the coastal plains | 5 | Sefid Rud | about 55 km from its mouth | SE of Sangar | Sangar | 37°07'16"N, 49°44'06"E | 39 | 12/05/2016 | |
rivers in the coastal plains | 13 | Shakhzar | about 32 km from its mouth | NE of Fuman | Fuman | 37°14'13"N, 49°20'43"E | 5 | 15/05/2016 | |
rivers in the coastal plains | 27 | Chelvand | about 2.5 km from its mouth | W Chelvand (S of Lavandvil) | Lavandvil | 38°17'20"N, 48°51'35"E | -6 | 19/05/2016 | |
rivers in the coastal plains | 36 | Karganrud | about 7 km from its mouth | in Talesh | Talesh | 37°48'22"N, 48°54'27"E | 36 | 22/05/2016 | |
rivers in the coastal plains | 37 | Navrud | about 5 km from its mouth | in Asalem | Asalem | 37°43'56"N, 48°57'13"E | 34 | 22/05/2016 | |
clear forest rivers | 6 | Zilaki River | RT of Sefid Rud | in Mush Bijar (E of Shahr-e Bijar) | Shahr-e Bijar | 37°00'28"N, 49°40'24"E | 125 | 13/05/2016 | |
clear forest rivers | 11 | Shafa Rud | about 20 km from its mouth | W of Punel | Punel | 37°31'47"N, 49°00'52"E | 218 | 15/05/2016 | |
clear forest rivers | 15 | Machian | LT of Bala Rud | Lunak waterfalls (S of Siahkal) | Siahkal | 37°00'31"N, 49°51'51"E | 484 | 16/05/2016 | |
clear forest rivers | 17 | Shamrud | RT of Sefid Rud | south of Tushi (S of Siahkal) | Siahkal | 37°03'00"N, 49°53'54"E | 252 | 16/05/2016 | |
clear forest rivers | 32 | Semoosh | RT of Polrud | SW of Rahimabad | Rahimabad | 37°00'11"N, 50°18'06"E | 88 | 21/05/2016 | |
clear forest brooks | 2 | Eshkaraab | RT of Khara Rud | S of Paein Khara Rud (S of Pashaki) | Sangar | 37°02'29"N, 49°47'52"E | 198 | 12/05/2016 | |
clear forest brooks | 7 | Sefidab | RT of Siah Rud | in Divarsh (NE of Shirkuh) | Tutkabon | 36°53'59"N, 49°35'06"E | 273 | 13/05/2016 | |
clear forest brooks | 8 | Chulak waterfall | LT of Reshte Rud | NE of Khulak (W of Oskolak) | Oskolak | 37°00'11"N, 49°29'49"E | 201 | 13/05/2016 | |
clear forest brooks | 10 | Sangdeh | LT of Shafa Rud | W of Punel | Punel | 37°31'47"N, 49°00'52"E | 218 | 15/05/2016 | |
clear forest brooks | 16 | unnamed brook | Lunak waterfalls | Lunak waterfalls (S of Siahkal) | Siahkal | 37°00'31"N, 49°51'49"E | 495 | 16/05/2016 | |
clear forest brooks | 28 | unnamed brook | LT of Shalman Rud1 | SW of Amlash | Amlash | 37°02'46"N, 50°05'42"E | 184 | 21/05/2016 | |
clear forest brooks | 30 | unnamed brook | RT of Shalman Rud | in Bolurdekan | Amlash | 37°01'55"N, 50°04'39"E | 282 | 21/05/2016 | |
clear forest brooks | 31 | unnamed brook | LT of Shalman Rud2 | SW of Amlash | Amlash | 37°02'13"N, 50°04'57"E | 287 | 21/05/2016 | |
clear forest brooks | 33 | unnamed brook | LT of Rudkhan | NE of Masuleh | Masuleh | 37°09'47"N, 49°00'17"E | 820 | 22/05/2016 | |
clear forest brooks | 34 | unnamed brook | RT of Rudkhan | NE of Masuleh | Masuleh | 37°09'42"N, 49°01'17"E | 697 | 22/05/2016 | |
polluted forest rivers | 1 | Khara Rud | RT of Sefid Rud | S of Paein Khara Rud (S of Pashaki) | Sangar | 37°05'01"N, 49°46'25"E | 81 | 12/05/2016 | |
polluted forest rivers | 3 | Kalardeh Rukhan | left fork of Khara Rud | in Madarsara (S of Pashaki) | Sangar | 37°04'12"N, 49°46'36"E | 103 | 12/05/2016 | |
polluted forest rivers | 4 | unnamed brook | right fork of Khara Rud | in Golestansara (S of Pashaki) | Sangar | 37°02'20"N, 49°47'27"E | 186 | 12/05/2016 | |
polluted forest rivers | 9 | Reshteh Rud | LT of Sefid Rud | NE of Khulak (W of Oskolak) | Oskolak | 37°00'07"N, 49°30'13"E | 185 | 13/05/2016 | |
polluted forest rivers | 18 | Choshal | E of Ezbaram (S of Lahijan) | Lahijan | 37°07'33"N, 49°56'39"E | 146 | 16/05/2016 | ||
polluted forest rivers | 35 | Masuleh Rudkhan | about 50 km from its mouth | E of Masuleh | Masuleh | 37°10'02"N, 49°05'03"E | 369 | 22/05/2016 | |
streams above 1000 m in Gilan Prov. | 12 | unnamed brook | LT of Shafa Rud | NW of Sangdeh | Sangdeh | 37°31'46"N, 48°45'19"E | 1337 | 15/05/2016 | |
streams above 1000 m in Gilan Prov. | 14 | Kakrud | LT of Polrud | in Ishku-ye Bala (SW of Deylaman) | Deylaman | 36°51'44"N, 49°52'52"E | 1356 | 16/05/2016 | |
streams above 1000 m in Gilan Prov. | 29 | unnamed brook | N of Chaldasht | Amlash | 36°59'86"N, 50°05'73"E | 1250 | 21/05/2016 | ||
streams above 1000 m in Ardabil Prov. | 19 | unnamed brook | small brook below Alvares ski areal | in Alvaresi (W of Sarein) | Sarein | 38°09'38"N, 47°56'21"E | 2237 | 17/05/2016 | |
streams above 1000 m in Ardabil Prov. | 20 | Bulakhlar chayi | left fork of the river | NW of Nir | Nir | 38°02'09"N, 47°58'55"E | 1622 | 17/05/2016 | |
streams above 1000 m in Ardabil Prov. | 21 | Bulakhlar chayi | LT of Hakim Geshlaghi chayi | NW of Nir | Nir | 38°02'09"N, 47°58'55"E | 1622 | 17/05/2016 | |
streams above 1000 m in Ardabil Prov. | 22 | unnamed brook | in Sardabe (W of Vakilabad) | Vakilabad | 38°17'03"N, 48°02'10"E | 1927 | 18/05/2016 | ||
streams above 1000 m in Ardabil Prov. | 23 | unnamed brook | below Sardabe (W of Vakilabad) | Vakilabad | 38°16'58"N, 48°02'28"E | 1901 | 18/05/2016 | ||
streams above 1000 m in Ardabil Prov. | 24 | Hakim Geshlaghi chayi | RT of Qareh-Su | SW of Almas (SW of Ardabil) | Ardabil | 38°08'27"N, 48°10'36"E | 1433 | 18/05/2016 | |
streams above 1000 m in Ardabil Prov. | 25 | Bulakhlar chayi | LT of Hakim Geshlaghi chayi | in Nir | Nir | 38°01'56"N, 47°59'48"E | 1602 | 18/05/2016 | |
streams above 1000 m in Ardabil Prov. | 26 | unnamed brook | E of Kadijan (E of Sarab) | Sarab | 37°56'25"N, 47°41'03"E | 1717 | 18/05/2016 | ||
streams above 1000 m in Ardabil Prov. | 38 | pond | pond on brook 22 & 23 | SE of Jomadi (E of Vakilabad) | Vakilabad | 38°16'55"N, 48°06'14"E | 1589 | 18/05/2016 |
Studied localities belong to the Euxino-Hyrcanian Province of the Euro-Siberian subregion of the Palaearctic Region (
Published records of mayfly species/genera in Iran were excerpted from available literature and summarised in Table
Commented list of Ephemeroptera of Iran with notes to their distribution. Species representing new area records to Iranian mayfly fauna are in bold, data on taxa with unlikely occurrence are marked with an asterisk (*). See Table
Species/genus | Records from Iran | Notes to the global area and distribution | Remarks to records in Iran |
---|---|---|---|
Ameletidae | |||
*Ameletus sp. | Qazvin Prov.: Shahrud | Holarctic genus, with the area extension to Central America and Oriental Region. The only Euro-Siberian species is A. inopinatus Eaton, 1887, in Central Asia A. alexandrae Brodsky, 1930. | Unidentified species reported by |
Siphlonuridae | |||
*Siphlonurus sp. | Isfahan Prov.: Zayanderud, | Holarctic genus, including subarctic areas. Twelve species known from the West Palearctic Region. | Unidentified species reported by |
Ametropodidae | |||
Ametropus sp. | „117 km south of Rasht“ | Holarctic genus. In the West Palearctic Region, the only species Ametropus fragilis Albarda, 1878. Ametropus eatoni Brodsky, 1930 described from Siberia, Ural requires re-evaluation. | Unidentified species reported from unclear locality 117 km S of Rasht by |
Baetidae | |||
Baetis (Acentrella) sp. | Isfahan Prov.: Zayanderud | Holarctic and Oriental genus. Five species known from the West Palearctic Region, additional species known from Central Asia. | Unidentified species reported by |
Baetis sp. | Qazvin Prov.: Shahrud; Alborz Prov.: Kordan riv., Haraz riv., Tehran Prov.: Jajrud, Bareghan riv.; Mazandaran Prov.: Tajan riv., Dalir riv., Chatan riv., Firuz Abad riv.; Ardabil Prov.: Gharasou riv.; Kermanshah Prov.: Kavat riv.; Isfahan Prov.: Zayanderud; and 50 km SE of Khorramabad, 1500 m a.s.l. | Cosmopolitan genus except for South America. Very diverse in the West Palaearctic Region, at least 64 species known from Europe. | Unidentified species reported by |
Baetis (Baetis) baroukianus Thomas & Dia, 1984 | Gilan Prov.: 7, 33, 34 | Its distribution not known in details, reported from two disjunctive subareas in Lebanon and Iran ( |
B. alpinus species-group. Described from Lebanon ( |
*Baetis (Baetis) bicaudatus Dodds, 1923 | Tehran Prov.: Jajrud | Holarctic species, in Palaearctic Region reported from Altai, Mongolia and Russian Far East ( |
A species close European representatives to the B. alpinus species-group. Reported by |
Baetis (Baetis) buceratus Eaton, 1870 | Gilan Prov.: 5, 13, 27, 28, 32, 37; Ardabil Prov.: 24, 38 | Widely distributed from Europe to Central Asia including Near East, Iraq ( |
Iran falls within its known distributional range. |
Baetis (Baetis) monnerati Gattolliat & Sartori, 2012 | Mazandaran Prov.: brook above Yalrud 36°06'17"N / 51°50'14"E, 2 larvae; brook above Molla Kala, 4 larvae (coll. M. Svitok, unpublished) | Recently described from Jordan ( |
B. buceratus species-group. Iran represents the easternmost limit of its area. |
Baetis (Baetis) cf. nexus Navás, 1918 | Gilan Prov.: 14; Ardabil Prov.: 21–24, 26, 38 | Known from Europe and Turkey ( |
Iran represents easternmost limit of its area. Material shows some morphological differences from European material and requires more detailed examination. The synonymy of B. pentaphlebodes to B. nexus is highly questionable, we follow the IZCN Opinion No. 2171 (2007), until new evidence is published. |
Baetis (Baetis) fuscatus (Linnaeus, 1761) | „Southern Persia“New recordsGilan Prov.: 1, 6, 13, 18, 27, 32, 36 | Transpalaearctic species. Doubtfully distinguishable species from West Palaearctic species B. scambus Eaton, 1870 in the larval stage. | B. fuscatus mentioned by Eaton (1885) as “… eastwards to Southern Persia (Hagen Mus)”. Iran falls within known distributional range of both species. |
Baetis (Baetis) lutheri Müller-Liebenau, 1967 | Gilan Prov.: 1–7, 9, 11, 13, 14, 17, 18, 27, 28, 32, 35–37; Ardabil Prov.: 23, 24 | Widely distributed from Europe to Caucasus, Turkey ( |
Iran represents the easternmost limit of its area. Larvae of B. lutheri species-group from N Iran can be confused with poorly known species Baetis petrovi Tshernova, 1938 (see |
Baetis (Baetis) vardarensis Ikonomov, 1962 | Gilan Prov.: 2, 5, 13, 14, 18,–28, 32, 36, 37; Ardabil Prov.: 26 | Widely distributed from Europe to Caucasus and Turkey ( |
Iran represents the easternmost limit of its area. |
Baetis (Baetis) samochai Koch, 1981 | Gilan Prov.: 13 | Known from Turkey ( |
Iran represents the easternmost limit of its area. |
Nigrobaetis (Takobia) muticus (Linnaeus, 1758) | Mazandaran Prov.: Chatan riv.New recordsGilan Prov.: 12, 19, 29, 35, 36; Ardabil Prov.: 21, 22 | Widely distributed from North Africa (confirmation needed), Europe, Russia and Turkey to Caucasus and Central Asia (eastern Kazakhstan, |
In Iran, reported first from Chatan riv. in Mazandaran Prov. by |
Nigrobaetis (Nigrobaetis) gracilis (Bogoescu & Tabacaru, 1957) | Gilan Prov.: 13 | Distributed in the Alps, Carpathians, Caucasus, reported also from Tajikistan ( |
Iran falls within its known distributional range. |
Baetis (Rhodobaetis) braaschi (Zimmermann, 1980) | Gilan Prov.: 9, 14; Ardabil Prov.: 22, 24–26 | Occurs in neighbouring countries, reported from Eastern Ukraine to Crimea, Turkey, Caucasus and Central Asia ( |
Iran represents the easternmost limit of its area. |
Baetis (Rhodobaetis) cf. vadimi Godunko, Palatov & Martynov, 2015 | Gilan Prov.: 7, 10–12, 14, 29, 31, 33; Ardabil Prov.: 19, 23 | Probably undescribed species, closely related to B. vadimi from Georgia and Turkey. Possibly conspecific with part of material identified as “Baetis gemellus“ in the past from Europe and Middle East. | Material from Iran morphologically similar to species identified as B. cf. gadeai from Caucasus ( |
Baetis (Rhodobaetis) ilex (Jacob & Zimmermann, 1978) | Tehran Prov.: brook in Younza Pass, 35°59'18"N / 51°43'13"E, 5 larvae; brook 36°00'54"N /E 51°47'18‘‘, 7 male imagines (coll. M. Svitok, unpublished); Gilan Prov.: 12, 33; Ardabil Prov.: 19, 20, 22 | Poorly known species, so far considered endemic to the Caucasus ( |
Only 20 larvae known from the Caucasus to date ( |
Baetis (Rhodobaetis) rhodani (Pictet, 1843) | West Azerbaijan Prov.: Zarrinehrud; Alborz Prov.: Karaj riv.New recordsGilan Prov.: 1–7, 9–14, 27, 28, 30, 32–37; Ardabil Prov.: 16–23, 25, 26, 38 | Widely distributed in the Western Palaearctic region. Records from the East Palaearctic appear rather unlikely (Bauenrfeind and Soldán 2012). | Reported from Zarrinehrud in West Azerbaijan Prov. ( |
Cloeon sp. | Alborz Prov.: Kordan riv.; Mazandaran Prov.: Tajan riv., Valasht lake | Almost cosmopolitan, including some remote oceanic islands. About 15 species from three subgenera known from the West Palaearctic Region. | Unidentified species reported by |
Cloeon (Cloeon) cognatum Stephens, 1836 | Tehran Prov.: Jajrud | Holarctic species, reported from Central America as well ( |
Reported from Jajrud near Tehran ( |
Cloeon (Cloeon) dipterum (Linnaeus, 1761) | Tehran Prov.: JajrudNew recordArdabil Prov.: 38 | Widely distributed in the Palaearctic Region, known also from the Nearctic Region (Quebec and Ontario, see |
Except our record known from Jajrud near Tehran ( |
Cloeon (Similicloeon) simile Eaton, 1870 | West Azerbaijan Prov.: Zarrinehrud | Transpalearctic species, missing in Japan. | Reported from Zarrinehrud in NW Iran ( |
Centroptilum sp. | Isfahan Prov.: ZayanderudNew recordsGilan Prov.: 28, 31 | Holarctic genus, with an area extension into the Oriental Region. Two West Palaearctic species: C. luteolum O. F. Müller, 1776 and C. pirinense Ikonomov, 1962. | Our records represent undescribed species related to C. luteolum. The species will be described by Martynov (pers. comm.) based on the material from Caucasus (AR Adjara). Unidentified species of the genus Centroptilum was also reported by |
Procloeon (Pseudocentroptilum) caspicum sp. n. | Gilan Prov.: 7, 27 (type locality), 36 | So far known from the type locality in Iran only. | |
Oligoneuriidae | |||
Oligoneuriella sp. | Mazandaran Prov.: Tajan riv., Firuz Abad riv., Poleocean riv.; Isfahan Prov.: Zayanderud | Palaearctic genus, ten species known from the West Palaearctic Region. In the Near East, seven species known from Turkey ( |
Unidentified species of the genus Oligoneuriella was reported from Zayanderud in Central Iran by |
Oligoneuriella tskhomelidzei Sowa & Zosidze, 1973 | Mazandaran Prov.: mountain stream, Gazanak, 1400 m a.s.l.New recordsGilan Prov.: 11, 17, 27, 36, 37 | Caucasian species described from Georgia ( |
Oligoneuriella baskale described from east Turkey, two female imagines reported from Iran ( |
Heptageniidae | |||
*Arthroplea sp. | Isfahan Prov.: Zayanderud | Holarctic genus, in the Palaearctic Region evidently boreomontane element. One species, Arthroplea congener Bengtsson, 1908, in the West Palaearctic Region. | Unidentified species reported by |
Ecdyonurus sp. | Mazandaran Prov.: Tajan riv.; Qazvin Prov.: Shahrud; Alborz Prov.: Karaj riv.; Isfahan Prov.: ZayanderudNew recordsGilan Prov.: 14; Ardabil Prov.: 19–22, 25, 26 | West Palaearctic genus, about 42 species known. | Unidentified species were reported by |
Ecdyonurus ornatipennis Tshernova, 1938 | „117 km south of Rasht and 50 km SE of Khorramabad, 1500 m a.s.l.“ | Described from Azerbaijan, known throughout Caucasus and from Turkey ( |
First records from Iran by |
Electrogena bothmeri (Braasch, 1983) | Chalus, Mazandaran Prov. (type locality) | Known only as the holotype male subimago (!) described by |
Single record from the type locality ( |
Electrogena pseudaffinis (Braasch, 1980) | Gilan Prov.: 1–4, 6, 7, 10–12, 15–18, 27, 28, 30–32, 35, 36 | Caucasian species described from the Russian part of Caucasus ( |
Common and often abundant species in streams studied in the Gilan Prov., preferring forest streams and rivers at lower altitudes. |
Electrogena cf. squamata (Braasch, 1978) | Gilan Prov.: 10–12, 16, 28, 29, 31–35 | Caucasian species known from Georgia (Braasch 1978, |
Common and often abundant species in streams studied in Gilan Prov., preferring forest streams and rivers with no apparent altitude preference. At lower stream sections syntopic with E. pseudaffinis. |
Electrogena ressli (Braasch, 1981) | Gilan Prov.: Rasht | Type locality in Turkey, paratypes (one male imago and one male subimago) known from Iran ( |
Single record from the type locality, no record since then. |
Heptagenia sp. | Tehran Prov.: Jajrud, Bareghan riv.; Alborz Prov.: Karaj riv.; Mazandaran Prov.: Haraz riv., Tajan riv.; Isfahan Prov.: Zayanderud | Holarctic and Oriental genus, not recorded from North Africa. Nine species known from the West Palaearctic Region. Five species known from the Near East. | Unidentified species reported by |
Heptagenia samochai Demoulin, 1973 | Golestan Prov.: Gorgan | Known from eastern Europe to Asia Minor. Recorded from Georgia, Crimean Peninsula, Russia, Armenia, Israel, and Iran. | Reported from Iran sub Heptagenia lutea (syn. subj.) by |
Epeorus sp. | Alborz Prov.: Kordan riv.; Mazandaran Prov.: Tajan riv.; Ardabil Prov.: Gharasou riv. | Holarctic genus, with an extension to Neotropics and Oriental Region. Representatives of three subgenera, Caucasiron, Epeorus and Ironopsis, ( |
Unidentified species without an affiliance to either subgenera were reported by |
* Epeorus (Iron) sp. | Tehran Prov.: Jajrud, Bareghan riv. |
Subgenus Iron is Holarctic, its species known mainly from Central Asia, Siberia, Far East and North America ( |
Unidentified species reported by |
* Epeorus (Ironopsis) sp. | Tehran Prov.: Jajrud |
Subgenus Ironopsis is Holarctic, its species known from USA, Central Asia and Europe ( |
Unidentified species reported by |
Epeorus (Caucasiron) sp. | Gilan Prov.: 12, 17, 27, 30 | Subgenus Caucasiron is distributed in the East Mediterranean, Caucasus, Central Asia and Southwestern China. Eleven species and two subspecies known up to date. The highest diversity (9 species) in the Caucasus Mts. | Species recorded in low abundace in Gilan Prov.; deserves further examination. |
Epeorus (Caucasiron) caucasicus iranicus (Braasch & Soldán, 1979), comb. nov. | Tehran Prov.: stream in Darband Valley, 2100 m a.s.l., (type locality).Mazandaran Prov.: Dalir riv., Firuz Abad riv., Haraz riv., Koshk Sara riv.New recordArdabil Prov.: 19 | Recently known only from the Alborz mountain range. Larva and nymphal protopenis bear features proposed for subgenus Caucasiron, imago unknown. | Recorded from Tehran Prov. ( |
Epeorus (Caucasiron) cf. znojkoi Tshernova, 1938 | Gilan Prov.: 2–4, 7, 8, 10–12, 15–17, 27, 29, 30, 33–35 | Widely distributed in Caucasus and Asia Minor. Known from Turkey ( |
The most common Epeorus (Caucasiron) species recorded at the streams studied in Gilan Prov. Iran represents the easternmost limit of its known distribution. |
Epeorus (Epeorus) zaitzevi Tshernova, 1981 | Gilan Prov.: 14 | Described from Armenia as imago, larva described by |
Species recorded from one locality in the Alborz Mts. Iran represents the easternmost limit of its known distribution. |
*Cinygmula sp. | Qazvin Prov.: Shahrud | Cinygmula shows Holarctic (East Palaearctic and Nearctic) area. Western limits of this area in Central Asia (Uzbekistan, Kirgizstan) and probably northern mountain ranges in Afghanistan and Pakistan, definitively missing in Caucasus. | Unidentified species reported by |
Rhithrogena sp. | Tehran Prov.: Jajrud, Bareghan riv.; Alborz Prov.: Kordan Riv.; Mazandaran Prov.: Tajan Riv.; Isfahan Prov.: Zayanderud;New recordGilan Prov.: 19 | Holarctic genus, including North Africa, with the area extension to the Oriental Region. Very diverse genus (more than 150 species) in the West Palaearctic Region. | Unidentified species reported by |
Rhithrogena cf. decolorata Sinitshenkova, 1973 | Gilan Prov.: 10–12, 15, 17, 18, 27, 33, 34, 35–37 | Widely distributed throughout the Caucasus, known also from the Talysh Mts. in Azerbaijan ( |
Common species in the Gilan Prov. |
Rhithrogena iranica Braasch, 1983 | Shesavar (type locality), likely referring to Shahsavar | Known only as the holotype (male imago) and paratypes (two female subimagines) described by |
Insufficient localisation of the type locality. |
Rhithrogena paulinae Sartori & Sowa, 1992 | Tehran Prov.: Sefid Khok, Alborz Mts., 2200 m a.s.l. (type locality) | Only holotype (imago male) and paratypes (four female imagos and two larvae) from a single locality known ( |
Known only from the Alborz Mts. |
Leptophlebiidae | |||
Paraleptophlebia sp. | Alborz Prov.: Kordan riv. | Holarctic genus, six species known from the West Palaearctic Region. | Unidentified species reported by |
Paraleptophlebia submarginata (Stephens, 1935) | „50 km SE of Khorramabad, 1500 m a.s.l.“ | Widely distributed in Europe (from Fennoscandia to Mediterranean), in northeast reaching to Ural and W Siberia (e.g., |
The only record from Iran with insufficient localisation ( |
Habroleptoides confusa Sartori & Jacob, 1986 | Gilan Prov.: 7, 8, 10, 12, 15, 16, 27–29, 31, 33–35. | Widely distributed in Europe (not in Fennoscandia), in east from Greece and Turkey to Armenia and Azerbaijan ( |
Common in small forest brooks in the Gilan Province. |
Habrophlebia cf. lauta Eaton, 1884 | Gilan Prov.: 1, 8, 31 | West Palaearctic species, known from North Africa, Europe, Caucasus and Turkey. | Only small-instar larvae found in the Gilan Prov. |
*Leptophlebia sp. | Mazandaran Prov.: Tajan riv. | Holarctic genus, with extension to transitory Palaearctic-Oriental area in China. Only two West-Palaearctic species, L. vespertina Linnaeus, 1758 and L. marginata Linné, 1767, which occurrence in Iran is unlikely. | Unidentified species reported by ( |
Choroterpes (Euthraulus) sumbarensis Kluge, 1984 | Razavi Khorasan Prov.: Mashhad (Kopedag Mts.) | Described from the Kopetdag Mts. in Turkmenistan ( |
According to |
Ephemerellidae | |||
Ephemerella sp. | Mazandaran Prov.: Tajan riv.; Alborz Prov.: Karaj riv. | Holarctic and Oriental genus, three species known from the West Palaearctic Region. | Unidentified species reported by |
*Ephemerella maculocaudata Ikonomov, 1961 | Mazandaran Prov.: Siah Bisheh riv. | Mediterranean species known from two disjunctive areas, Balkan (Macedonia, Bulgaria) and west Mediterranean (Spain, France). Occurrence in Iran is unlikely.According to |
Recorded from Iran as Ephemerella maculocaudata Ikonomov, 1961 by |
Serratella sp. | Mazandaran Prov.: Shahrud; Isfahan Prov.: Zayanderud | Holarctic and Oriental Regions. Generic classification of species is unstable in the literature. | Unidentified species reported by |
Serratella elissa Jacobus, Zhou & McCafferty, 2009 | Gilan Prov.: Gilan River (?) at Lanak Waterfall, 37°00'N, 49°52'E (type locality); Havigh River, 20 km south of AstaraNew records1–4, 6, 7, 11, 15–18, 27, 28, 32, 35, 36 | Described from the Gilan Province by |
Common species at our streams studied; can occur at high abundance in eutrophicated streams. Found also at the type locality in Lunak (not Lanak in page 55 in |
Serratella ignita (Poda, 1761) | West Azerbaijan Prov.: ZarrinehrudNew recordsGilan Prov.: 1–4, 6, 18; Ardabil Prov.: 21, 25 | Widely distributed species, known from North Africa and entire Europe, through Asia Minor, Near East to Mongolia, China and Korea. | Reported from Zarrinehrud in NW Iran ( |
Teloganopsis subsolana (Allen, 1973) | Mazandaran Prov.: 13 km NW of Ghalekesh | Described from the Kabul River in Afghanistan ( |
The only record since its original description( |
Potamanthidae | |||
Potamanthus sp. | Isfahan Prov.: Zayanderud | Holarctic and Oriental genus, including single Palearctic species Potamanthus luteus Linné, 1767. Two subspecies currently recognised: P. luteus luteus Linné, 1767 and P. luteus oriens Bae & McCafferty, 1991. The former distributed in Europe, North Africa and Asia Minor (Turkey and Syria) and the latter distributed from lower Amur basin to Manchuria, Japan and Korea. | Unidentified species of the genus Potamanthus reported by |
Ephemeridae | |||
Ephemera danica (Müller, 1764) | West Azerbaijan Prov.: Zarrinehrud | West Palaearctic species, distributed in Europe and southeast to Turkey ( |
Reported from Zarrineh river in W Azerbaijan ( |
Palingeniidae | |||
Mortogenesia mesopotamica (Morton, 1921) | Karkheh riv., Bsaitin (?) | Described and later confirmed by several records from Tigris river in Iraq (see references in |
|
Palingenia fuliginosa (Georgi, 1802) | Gilan Prov.: Hassankiade | Known from eastern Europe (E Slovakia, N Ukraine), Caucasus Mts., and northern Iran. | The only historical record by |
Palingenia longicauda (Olivier, 1791) | Aras riv. | South-Central European species. | The record is based on 5 male imagines collected on 20 June 1905 available in the collection of the Museum für Naturkunde in Berlin. Material was revised by A.H. Staniczek and R.J. Godunko in February 2017. Previous determination “Palingenia longicauda var. fuliginosa Georgi“ by E. Schoenemund. As Aras river forms the border between Azerbaijan and Iran, the species can be formally included in the Iranian fauna. |
Palingenia orientalis Chopra, 1927 | Sistan and Baluchestan Prov.: Seistan (?) (type locality) | Known from two discrete areas; described from “Seistan” by |
The record from Iran is based on the type series only ( |
Caenidae | |||
Caenis sp. | Tehran Prov.: Jajrud, Bareghan riv.; Alborz Prov.: Kordan riv.; Mazandaran Prov.: Tajan riv., Haraz riv.; Isfahan Prov. Zayanderud | Almost cosmopolitan genus, except for Australia and remote oceanic islands. At least 22 species known from the West Palaearctic Region. | Unidentified species reported by |
Caenis kopetdagi Kluge, 1985 | Razavi Khorasan Prov.: Mashhad (Kopedag Mts.) | Described from the Kopetdag Mts. in Turkmenistan ( |
According to |
Caenis macrura Stephens, 1836 | Mazandaran Prov.: Koshk Sara riv., Abbas Abad Dam, Valasht lakeNew recordsGilan Prov.: 1–4, 6, 8–11, 14–18, 27, 30–32, 35–37; Ardabil Prov.: 20–22, 24–26, 38 | Palaearctic species distributed from Fennoscandia east to Russia and Minor Asia. Known from Israel ( |
Records from Mazandaran Prov. provided by |
Cercobrachys sp. | Isfahan Prov.: Zayanderud | Holarctic, Oriental and Neotropic genus. Single Palaearctic species, C. minutus Tshernova, 1952 with wide Transpalaearctic distribution. | Unidentified species reported by |
Clypeocaenis bisetosa Soldán, 1978 | Mazandaran Prov.: mountain stream in Gazenak, 1400 m a.s.l. | Described from India, paratypes from the Alborz Mts. ( |
No recent record from Iran. |
Mayfly larvae were collected by T. Soldán, J. Bojková and J. Imanpour Namin from 12 to 22 May 2016, using metal strainers after kick-sampling. Sampling of larvae for about 30–60 minutes was supplemented by sweeping of imagines and subimagines from riparian vegetation by a standard entomological net. The material studied in the present contribution sums up to 9213 larval specimens and 245 subimagines and imagines. Most material is deposited in the collection of the Biology Centre, Czech Academy of Sciences, Institute of Entomology, České Budějovice, Czech Republic. Reference specimens for the species recorded are deposited in the collection of J. Imanpour Namin (Department of Fishery, University of Gilan). All specimens were preserved in 96% ethanol. Some specimens were mounted on slides with HydroMatrix (MicroTech Lab, Graz, Austria). Drawings for the descriptions of the new species were made using a stereomicroscope Olympus SZX7 and a microscope Olympus BX41, both equipped with a drawing tube. Photographs were made using a Canon EOS 1200D camera mounted on a Leica M205 C stereomicroscope. All photographs were subsequently enhanced with Adobe Photoshop CS5. For scanning electron microscopy, samples were gradually transferred to acetone, critical point dried and coated with gold by sputtering using a Baltec SCD050 Sputter Coater. Observations were taken on the scanning microscope Jeol JSM 7401F at 4 kV (BC CAS, České Budějovice). Eggs were dissected from a pharate female subimago.
(based on larvae and eggs). Labrum with pronounced medial notch, anterior margin laterally from medial notch strongly asymmetric; mandible incisor groups separated at distal third of their length; maxillary palps three-segmented, not thickened, length of segment III of maxillary palp reaches 0.5 × segment II length; fully developed hind wing pads; length of tarsal claws 0.44 × tarsus (forelegs); 0.55 × tarsus (middle and hind legs); lateral spines present on abdominal segments VIII–IX; single gill plates with rudimental dorsal lamella; inner margin of paraproct with approximately 8–11 large teeth; egg chorion without equatorial band of large papillae.
Mature larva. Body length 7–8 mm, length of antennae approximately 2 mm, length of cerci 2–3 mm (0.3 × body length). General colouration yellowish with darker brownish pattern (Figs
Head. Labrum (Fig.
Procloeon (Pseudocentroptilum) caspicum sp. n., larva: 2 mature female larva, habitus (dorsal) 3 mature female larva, habitus (lateral) 4 labrum (right side dorsal, left side ventral) 5 left mandible, apicolateral part (dorsal) 6 right mandible, apicolateral part (dorsal) 7 maxilla 8 labial palp (ventral) 9 glossa and paraglossa (ventral) 10 labial palp (dorsal) 11 glossa and paraglossa (dorsal).
Thorax. Prothorax approximately 3× broader than long, whitish, with darker brownish pattern (Fig.
Procloeon (Pseudocentroptilum) caspicum sp. n., larva: 12 foreleg 13 middle leg 14 hind leg 15 foreleg, apical part of femur and basal part of tibia (dorsal, setae on ventral side dashed) 16 hind wing pad 17 lateral margin of abdominal segments VII–IX 18–24 gill plates I–VII 25 tergite V, posterior margin 26 tergite X, posterior margin 27 paraproct 28 cercus, apical part (swimming setae omitted).
Abdomen. Terga whitish, with dark spots forming clear pattern (Figs
Oval shaped; 130–140 µm long, 65–75 µm wide. Chorionic surface covered with thick reticulated ridges forming irregular polygonal mesh (Fig.
Unknown.
Holotype. Female mature larva, IRAN, Chelvand River above Chelvand (S of Lavandvil), approximately 2.5 km from its inflow into Caspian Sea, -6 m a.s.l., 38°17'20"N, 48°51'35"E (locality 27), 19.5.2016.
Paratypes. 1 male, 7 female larvae (3 specimens mounted on slides), same locality as holotype; 1 female larva, IRAN, Sefidab River in Divresh (SE of Shirkooh), 273 m a.s.l., 36°53'59"N, 49°35'06"E (locality 7), 13.5.2016; 1 female larva, IRAN, Karganrud River in Talesh, ca 7 km from its inflow into the Caspian Sea, 36 m a.s.l., 37°48'22"N, 48°54'27"E (locality 36), 22.5.2016.
All types deposited in the collection of the Biology Centre, Czech Academy of Sciences, Institute of Entomology, České Budějovice, Czech Republic.
The species name refers to the proximity of the type locality to the Caspian Sea.
Larvae were found in three different stream habitats, two eutrophic streams of different size (Chelvand and Karganrud rivers) in the Caspian Sea coastal plain relatively close to their inflow to the sea and one small, clear and cold brook in the forest. Chelvand at the type locality is a small river with coarse stony substratum rapidly flowing from the hills to the plain so it partially keeps its mountainous character also in low altitude (-6 m a.s.l.). Procloeon caspicum sp. n. larvae co-occurred with numerous larvae of Serratella elissa, Baetis vardarensis and Caenis macrura, and less numerous Epeorus (Caucasiron) spp., Rhithrogena cf. decolorata. Karganrud in Talesh is a warm river flowing in the urban and agricultural area with wide flat alluvium and stony-gravel substratum. Bottom substrate had rich cover of green filamentous algae. Procloeon caspicum sp. n. co-occurred with numerous larvae of Rhithrogena cf. decolorata, Oligoneuriella tskhomelidzei, Baetis vardarensis, Baetis rhodani, and less numerous Baetis fuscatus and Serratella elissa. Sefidab, the third and completely different stream, is a small cold brook entirely shaded by forest with coarse stony bottom and alternating pools and riffles. Procloeon caspicum co-occurred with numerous larvae of Epeorus (Caucasiron) cf. znojkoi, Electrogena pseudaffinis, Baetis baroukianus and less numerous Serratella elissa and Habroleptoides confusa.
Within the subfamily Cloeoninae, several views on the (sub)generic classification have been published, most recently by
In this study, we follow
The new species is characterized by a relatively uncommon (within Procloeon) combination of two characters, i.e., the presence of fully developed hind wing pads and single gill plates. Such a combination is present in three Procloeon species only, namely Procloeon (Pseudocentroptilum) albisternum (Novikova, 1986), Procloeon (Pseudocentroptilum) maritimum (Kluge, 1983) and Procloeon (Pseudocentroptilum) calabrum (Belfiore & D’Antonio, 1990). Occurrence of these species in Iran is extremely unlikely, since the former two species are distributed in the Far East – Russia (
Both P. albisternum and P. maritimum differ from P. caspicum sp. n. in the absence of rudimental dorsal lamella of gill plates (figs 105–109 in
However, in contrast to P. caspicum sp. n., P. albisternum possesses a different shape of labrum (almost rectangular with a very shallow notch in the middle of anterior margin), more deeply divided mandibular incisors, and a two-segmented maxillary palp (fig. 1 in
Procloeon maritimum differs in the shape of maxillary palp, which is apically rounded and distinctly thicker in P. maritimum compared to P. caspicum sp. n. (figs 5, 20 in
Procloeon calabrum can be reliably distinguished from P. caspicum sp. n. based on several characters. It differs in the shape of labrum, with medial notch on anterior margin much more pronounced in P. caspicum sp. n. compared to P. calabrum. Anterior margin laterally from the medial notch is symmetrically rounded in P. calabrum (fig. 9 in
List of species known from Iran. A detailed review of literature revealed 42 references published in international journals accessible to the scientific public. Publications written in Persian (Farsi) were previously reviewed by
Broadening literature data with new material sampled in 2016, we conclude altogether 48 species records and 22 records at generic/subgeneric level of determination (Table
Excluding B. bicaudatus and E. maculocaudata as discussed above, 46 reliable species were recorded, 18 species of them were recorded to Iran for the first time (in bold in Table
(i) Holarctic and Transpalaearctic species form the minority of the mayfly fauna of Iran, encompassing six eurytopic species: Baetis fuscatus, Baetis rhodani, Cloeon simile, C. cognatum, C. dipterum, and Serratella ignita. Concerning the genus Cloeon, there are persisting taxonomic and determination problems, especially in the subgenus Cloeon s. str. and actual findings in Iran, thus, should be considered with caution. Likewise, B. rhodani is currently considered a polytypic species with the cryptic species throughout the geographical range (
(ii) West Palaearctic species with southern area limit in the Middle East included 13 species. Most of them are widely distributed throughout the whole area: Baetis buceratus, B. lutheri, B. nexus, B. vardarensis, Paraleptophlebia submarginata, Habroleptoides confusa, Habrophlebia lauta, Ephemera danica, Palingenia longicauda, and Caenis macrura (
(iii) West Palaearctic species with area disjunction to Central Asia, Baetis gracilis to Tajikistan, B. muticus to Kazakhstan (
(iv) Caucasian species with the distribution reaching Alborz Mts. and Azerbaijan Provinces in north Iran: Baetis ilex, B. vadimi, Oligoneuriella tskhomelidzei, Ecdyonurus ornatipennis, Electrogena pseudaffinis, E. squamata, Rhithrogena decolorata, Epeorus znojkoi.
(v) Near and Middle East species include those described and known from Iran only: Procloeon caspicum sp. n., Electrogena bothmeri, Rhithrogena iranica, R. paulinae, Epeorus caucasicus iranicus, and Serratella elissa. Most of them are insufficiently known; E. bothmeri and R. iranica were described based on imagines (subimagines) only, the status of the latter species should be revised. The same concerns Electrogena ressli described from Turkey with paratypes from Gilan Province in Iran. On the contrary, only larvae were described in E. caucasicus iranicus, S. elissa and P. caspicum sp. n. Real distribution of all these species is unknown. Other species are, beside Iran, known from a single neighbouring country: Baetis baroukianus (Lebanon), Baetis monnerati (Jordan), Choroterpes sumbarensis and Caenis kopetdagi (Turkmenistan), Teloganopsis subsolana (Afghanistan), Mortogenesia mesopotamica (Iraq), Palingenia orientalis (Israel), and Clypeocaenis bisetosa (India). The only exception is B. samochai which inhabits the whole Near East (Turkey, Israel, Lebanon, Syria, and Iran).
Most studies and records on mayflies are available from northern Iran which belongs to Euxino-Hyrcanian Province of the Euro-Siberian subregion of the Palaearctic Region (
This list of Ephemeroptera of Iran is undoubtedly preliminary and incomplete due to limited literature sources and lack of correct determination of material collected for water quality assessment. Thus, the total number of 46 species recorded is very low and does not represent the real diversity of mayflies in Iran. In comparison, Odonata, a very attractive and popular group of aquatic insects, have been better investigated at least from the faunistic point of view, with records of 100 species and subspecies throughout Iran (see current check list by
To fill evident gaps in our knowledge resulting from this review, we aim to work on a more extensive study of Iranian Ephemeroptera covering the geographical gradients within Iran. This may unravel unknown species and diversity in different biogeographical provinces of Iran. This however would require to set up a network of localities and to study at least some of them in different seasonal aspects. Our first field trips to Iran in 2016 and 2017, however, showed us that aquatic ecosystems have been under strong, long-term anthropogenic pressure and some areas unfortunately presumably no longer maintain their original aquatic biodiversity. We observed many rivers with severe pollution that most probably wiped out local populations of the aquatic fauna. Overexploitation of water sources and growing pollution from fertilisers, pesticides and municipal and industrial wastewaters are serious threats to aquatic biodiversity. Iran has 7.2 million ha of agriculture land dependent on irrigation, the largest area in the Middle East, thus, agricultural use accounts for more than 90% of total water withdrawal. About 1.7 million ha of irrigated land is affected by salinization (
We would like to thank the Faculty of Natural Resources of the University of Gilan and the Department of Environment, Natural History Museum and Genetic Resources, Teheran for support of our research. We are grateful to Farshid Ghorbani, Ehsan Asadi, and Milad Salehi for assistance in the field. We thank C. Belfiore for the information on Pseudocentroptilum calabrum and M. Svitok for the unpublished records of Baetis ilex and B. monnerati from Iran. This research was conducted with institutional supports of Masaryk University and Biology Centre, Czech Academy of Sciences (RVO: 60077344) and was part of the SMNS Research Incentive 2017 to AHS.