Research Article |
Corresponding author: Recep Sulhi Özkütük ( sozkutuk@anadolu.edu.tr ) Academic editor: Shuqiang Li
© 2017 Recep Sulhi Özkütük, Yuri M. Marusik, Kadir Boğaç Kunt, Mert Elverici.
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:
Özkütük RS, Marusik YM, Kunt KB, Elverici M (2017) Taxonomic notes on two sibling species of Metellina from Asia (Araneae, Tetragnathidae). ZooKeys 695: 75-88. https://doi.org/10.3897/zookeys.695.13611
|
Two sibling species, Metellina orientalis (Spassky, 1932) and M. kirgisica (Bakhvalov, 1974), occurring in the Middle East and Central Asia are redescribed and their distributions mapped. The previously unknown male of M. kirgisica is described for the first time. Stridulatory files on male chelicera of Metellina are also documented for the first time. The occurrence of M. kirgisica in Azerbaijan and Tajikistan and the presence of M. orientalis in Turkey are confirmed.
Anatolia, Aranei , Metainae , Caucasus, Central Asia, Iran, new record, description
Metellina Chamberlin & Ivie, 1941 is a small genus of Metainae spiders with seven named species occurring in the Holarctic (
Specimens were photographed with a Canon EOS 7D camera attached to an Olympus SZX16 stereomicroscope and Leica DFC295 camera connected to a stereo microscope Leica S8AP0. SEM figures were made with a SEM JEOL JSM-5200 scanning microscope at the Zoological Museum, University of Turku, Finland and with a Zeiss Ultra Plus SEM device at the Anadolu University, Eskişehir. Digital images were montaged using CombineZP image stacking software. The epigyne was cleared in a KOH/water solution until soft tissues were dissolved. Photographs were taken in dishes with cotton or paraffin on the bottom to hold the specimens in position. All measurements are given in mm. Materials studied here are deposited in the Zoological Museum of the Moscow State University (
Metellina
Chamberlin & Ivie, 1941: 14;
Pachygnatha curtisi McCook, 1894 from California.
See
Meta orientalis Spassky, 1932: 184, f. 5–8 (♂♀).
Metellina
orientalis
:
TURKEY: Konya Province: 1♂, 2♀ (
Males of M. orientalis can be easily distinguished from all congeners, except for M. kirgisica, by having strong cymbial spines (Figs
Somatic characters of Metellina kirgisica female from Tajikistan. 11–12 habitus, dorsal, showing differences in size and colour pattern 13, 16 habitus, ventral and lateral 14 metatarsus I prolateral, showing row of stiff setae 15 tibia I, prolateral. Scale bars 1 mm (11, 12, 13, 16); 0.2 mm (14).
Measurements (♂/♀): total length 6.48/6.60; carapace 2.88/2.70 long, 2.24/2.04 wide; chelicerae 1.20/1.20 long; abdomen 3.60/3.90 long, 2.40/3.12 wide.
Female carapace with weak pattern (Fig.
♂/♀ | Fe | Pa | Ti | Mt | Ta | Total |
---|---|---|---|---|---|---|
I | 3.50/3.60 | 1.44/1.40 | 4.00/3.60 | 4.40/4.00 | 1.60/1.50 | 14.98/14.14 |
II | 3.10/3.00 | 1.20/1.14 | 3.00/2.22 | 3.40/3.06 | 1.20/1.00 | 11.90/10.42 |
III | 2.00/2.10 | 0.75/0.84 | 1.50/2.04 | 1.80/1.62 | 0.65/0.78 | 6.70/7.38 |
IV | 2.88/2.94 | 0.78/0.84 | 2.10/2.28 | 2.40/2.40 | 0.90/0.90 | 9.06/9.36 |
Abdomen with three pairs of humps, almost indistinct in males. Anterior pair large and distinct in all females examined, two posterior pairs much smaller and can be indistinct. Pattern not distinct, in contrast to sibling species; venter with wide dark median band.
Male chelicera with five strong stridulating ridges and some smaller ones above and below. Male palp as in Figs
Epigyne as in Figs
This species was reported from Turkey for the first time by
Meta orientalis : Spassky, 1952: 1977–198 (misidentification).
Meta kirgisicus Bakhvalov, 1974: 101, f. 6–7 (♀).
Meta
kirgisica
Bakhvalov, 1982: 136, f. 1 (♀);
Metellina
kirgisica
: Marusik, 1989: 44;
AZERBAIJAN: Lenkoran Dist.: 1♀ (
Copulatory organs and chelicera of Metellina orientalis (23–25, 29) from Konya Province of Turkey and M. kirgisica (26–28). 23–24 male palp, dorsal and ventral 25 cymbial setae 26–28 epigyne, ventral, ventro-caudal and caudal 29 male chelicera, lateral. Abbreviations: Dd deep depression Fs fine spines Pd dorso-retrolateral arm Ps spur like process Pt lateral pits Pv finger-like ventral arm Se sclerotised outgrowth. Scale bars 0.2 mm (26, 27, 28).
Females of M. kirgisica can be distinguished from sibling M. orientalis by smaller size (carapace 2.0–2.1 long vs. 2.7), more developed pattern of carapace (cf. Figs
Male. Measurements (male unavailable, specimen lost, palp was illustrated in 80th by YM). Female: total length 4.5–5.5; carapace 2.0–2.1 long, 1.5–1.7 wide. Carapace yellow with complex dark pattern and distinct marginal dark stripe (Figs
♀ | Fe | Pt | Ti | Mt | Ta | Total |
---|---|---|---|---|---|---|
I | 2.70 | 1.10 | 2.85 | 2.60 | 1.25 | 10.50 |
II | 2.20 | 0.90 | 1.80 | 2.10 | 0.95 | 7.95 |
III | 1.50 | 0.65 | 0.90 | 1.10 | 0.65 | 3.80 |
IV | 2.15 | 0.70 | 1.40 | 1.55 | 0.75 | 6.50 |
Abdomen with three pairs of humps, anterior the largest, two posterior humps less distinct. Abdomen with distinct pattern as shown on Figs
Palp as in Figs
Epigyne as in Figs
Epigynes of Metellina orientalis (34–36, 39) and M. kirgisica (37–42). 34–35, 37–38, 41 ventral 36, 40, 42 caudal 39 outline of median plate of two species, showing differences in size and proportions 34–36 from Konya Province of Turkey 37–40 from Tajikistan 41–42 from Azerbaijan. Abbreviations: Sp sclerotized plate Se sclerotised outgrowth Mp median plate. Scale bars 0.2 mm
The species was previously known from Kyrgyzstan, Uzbekistan, Turkmenistan (
We thank Müjdat Çağlar (Eskişehir, Turkey) for provided assistance with SEM photography, Seppo Koponen (Turku, Finland) for arranging YM’s stay in Turku and work in the Zoological Museum, Alireza Zamani (Tehran, Iran) for providing comparative specimens from Iran, and Kirill Mikhailov (Moscow, Russia) for consultations on the distributions of M. kirgisica and M. orientalis in Central Asia. This study was supported by Anadolu University Scientific Research Projects Commission under the grant no: 1503F093.