Research Article |
Corresponding author: Ding Yang ( dyangcau@126.com ) Academic editor: Christopher Borkent
© 2020 Bing Zhang, Jinlong Ren, Yan Li, Ding Yang.
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:
Zhang B, Ren J, Li Y, Yang D (2020) New and little-known species of Tipula Linnaeus (Diptera, Tipulidae) from Laos, with a new synonym. ZooKeys 982: 11-31. https://doi.org/10.3897/zookeys.982.49781
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Only seven species of the genus Tipula Linnaeus were previously known to occur in Laos. Here one new species is added to the fauna of Laos, Tipula (Nippotipula) champasakensis sp. nov. Tipula (unplaced) cladomera Alexander, 1936 is designated as a synonym of T. (unplaced) reposita Walker, 1848, syn. nov. A key to species of the genus Tipula from Laos is presented.
biodiversity, description, distribution, systematics, taxonomy
The genus Tipula Linnaeus is a large genus in the family Tipulidae. It is distributed worldwide with 2445 known species and subspecies, of which 1024 taxa are from the Palaearctic Region, 496 taxa from the Nearctic Region, 464 taxa from the Neotropical Region, 112 taxa from the Afrotropical Region, 356 taxa from the Oriental Region, and 30 taxa from the Australasian/Oceanian Region (
The subgenus Nippotipula Matsumura is a small subgenus in the genus Tipula. It contains 17 known species and subspecies, of which five taxa are from the Palaearctic Region, two taxa from the Nearctic Region, and 15 taxa from the Oriental Region (
So far, only the following seven species of the genus Tipula were known to occur in Laos (
So far, only the following seven species of the genus Tipula were known to occur in Laos (
The specimens were studied and illustrated with a ZEISS Stemi 2000-c stereomicroscope. Details of coloration were checked in specimens immersed in 75% ethyl alcohol (C2H5OH). Genitalic preparations of males were made by macerating the apical portion of the abdomen in cold 10% NaOH for 12–15 hours. After examination, it was transferred to fresh glycerine (C3H8O3) and stored in a microvial pinned below the specimen. The specimens studied, which were collected in Laos during June 2017, are deposited in the Entomological Museum of China Agricultural University (
Some type and non-type material used in this paper were borrowed from the National Museum of Natural History, Smithsonian Institution, Washington, DC, USA (
The morphological terminology mainly follows
1 | Body velvet black or velvet orange (Figs |
2 |
– | Body brownish yellow or brown (Figs |
5 |
2 | Thorax velvet black ( |
T. (Formotipula) laosica Edwards, 1926 |
– | Thorax velvet orange (Figs |
3 |
3 | Clasper of gonostylus with two short acute blackened spines ( |
T. (F.) melanopyga Edwards, 1926 |
– | Clasper of gonostylus complex, beak with a lump near tip, back of beak bearing a sickle-shaped prominence directed anteriorly; dististyle outer surface with an acute blackened spine curved up (Fig. |
4 |
4 | Clasper of gonostylus broad and short, beak slender ( |
T. (F.) melanomera gracilispina Savchenko, 1960 |
– | Clasper of gonostylus slender, beak short ( |
T. (F.) melanomera melanomera Walker, 1848 |
5 | Body large, greater than 20 mm; eighth sternite extended backward, posterior margin with deep median notch, two small triangular processes present at bottom of notch (Fig. |
T. (Nippotipula) champasakensis sp. nov. |
– | Body not exceeding 20 mm; eighth sternite not as above | 6 |
6 | Posterior margin of cell cua1 as wide as base (Figs |
T. (unplaced) reposita Walker, 1848 |
– | Posterior margin of cell cua1 narrower than base (Fig. |
7 |
7 | Rs a little longer than R2+3, relatively straight (Fig. |
T. (Platytipula) sessilis Edwards, 1921 |
– | Rs very short, equaling R2, which is distinct and oblique ( |
T. (Schummelia) vitalisi Edwards, 1926 |
Tipula melanomera gracilispina
Tipula (Formotipula) melanomera gracilispina:
Hypopygium is blackish with black setae. Posterior margin of ninth tergite has a low U-shaped notch. Posterior margin of eighth sternite has a pair of digitiform appendages. Clasper of gonostylus is complex, broad, and short; beak slender.
Male (n = 5): Body length 13–15 mm, wing length 14–16 mm, antenna length 3.5–4.0 mm.
Head (Figs
Thorax (Figs
Abdomen (Fig.
Hypopygium (Figs
Tipula (Formotipula) melanomera gracilispina Savchenko, male 5 hypopygium, lateral view 6 ninth tergite, dorsal view 7 clasper of gonostylus, lateral view. tg 8 = eighth tergite, tg 9 = ninth tergite, st 8 = eighth sternite, st 9 = ninth sternite, lg = lobe of gonostylus. Scale bars: 1.0 mm (5, 6); 0.5 mm (7).
Female (n = 3): Body length 13–15 mm, wing length 14–16 mm, antenna length 3–4 mm.
Female resembles male in head and thorax, except abdomen plump. Eighth tergite and eighth sternite black throughout with black setae. Ninth tergite, ninth sternite, and tenth tergite dark black, with black setae (Fig.
Ovipositor (Figs
3 males 1 female (
China (Guizhou, Yunnan), Laos (Houaphanh).
Tipula melanomera
Tipula (Formotipula) melanomera:
Hypopygium covered with dense long setae. Clasper of the gonostylus slender; beak short with a long tuber which directed upward; dorsal margin bearing a sickle-shaped prominence which directed anteriorly (
Recorded from Nepal and Upper Burma (
Tipula melanopyga
Tipula (Formotipula) melanopyga:
Abdomen yellowish-white pruinose has blackish brown stripes, last two segments dark brown. Male ninth tergite has a slender hammer-shaped projection at middle. Clasper of the gonostylus with two short acute blackened spines (
Paratype, male, Laos: Nam Mat, 15 April 1918 (
Abdomen is reddish brown with thick brownish yellow setae. Eighth sternite extended backward, posterior margin has a deep median notch. Posterior margin of ninth tergite extended with sclerotized depression. Lobe of gonostylus is fleshy with a V-shaped depression at posterior margin. Clasper of gonostylus is duck-shaped.
Male (n = 8): body length 20–23 mm, wing length 16–18 mm, antenna length 5–6 mm.
Head (Figs
Thorax (Figs
Abdomen (Fig.
Hypopygium (Figs
Semen pump (Figs
Female (n = 2): body length 22–23 mm, wing length 17–18 mm, antenna length 5–6 mm.
Female resembles male in head and thorax, except abdomen plump (Fig.
Ovipositor reddish brown (Figs
Holotype
: male (
Tipula (Nippotipula) champasakensis sp. nov., male 23 hypopygium, lateral view 24 ninth tergite, dorsal view 25 eighth sternite, ventral view; 26 lobe of gonostylus, lateral view 27 clasper of gonostylus, lateral view. tg 8 = eighth tergite, tg 9 = ninth tergite, st 8 = eighth sternite, st 9 = ninth sternite, lg = lobe of gonostylus. Scale bars: 1.0 mm (23–25); 0.5 mm (26, 27).
Laos (Champasak).
The species is named after Champasak Province, where the type locality is located.
This new species is somewhat similar to T. (N.) coquilletti Enderlein, 1912 from Japan and T. (N.) sinica Alexander, 1935 from China (Zhejiang) in having a similarly shaped hypopygium, but it can be separated from these species by the shape of the eighth sternite and ninth tergite, posterior margin of eighth sternite with V-shaped notch which with two long triangular processes at bottom, and posterior margin of ninth tergite with a small spiny protrusion at middle. In T. (N.) coquilletti, the posterior margin of eighth sternite is without processes and V -shaped depression, and the posterior margin of the ninth tergite has a V-shaped notch. In T. (N.) sinica, the eighth sternite is without processes and V-shaped depression, and the posterior margin of the ninth tergite is extended with a sclerotized U-shaped depression.
Tipula (Nippotipula) champasakensis sp. nov. 28–30 male 28 semen pump, ventral view 29 semen pump, dorsal view 30 semen pump, lateral view 31–33 female 31 ovipositor, lateral view 32 ovipositor, dorsal view 33 ovipositor, ventral view. tg 8 = eighth tergite, tg 9 = ninth tergite, tg 10 = tenth tergite, st 8 = eighth sternite, st 9 = ninth sternite, aia = anterior immovable apodeme, pia = posterior immovable apodeme, ca = compressor apodeme, ce = cercus, hy = hypovalva. Scale bars: 0.5 mm (28–30); 1.0 mm (31–33).
Tipula sessilis
Pachyrhina demarcata
Tipula xanthopleura
Tipula (Schummelia) pergrata
Tipula (Platytipula) xanthopleura:
Tipula (Schummelia) sessilis:
Tipula (Schummelia) xanthopleura:
Tipula (Schummelia) demarcata:
Thoracic prescutum has three brown stripes; wing is brownish yellow and with brown pterostigma; Rs is a little longer than R2+3 and relatively straight; petiole of cell m1 is short. Abdomen is brownish yellow; notch of ninth sternite has a depressed semicircular lobe; lobe of gonostylus slender and gradually narrowed to obtuse tip, before the apex slightly narrower; clasper of gonostylus is a shallow, beak blackened, surface with abundant minute setae, lower lobe well developed (
Holotype, male, India: Kumaon, Muktesar, Khasi Hills, Cherrapunji, 1 April 1922 (T. B. Fletcher) (
Tipula reposita
Tipula brevis
Tipula brevis
Tipula reposita
Tipula (Vestiplex) brevis
Tipula (Vestiplex) brevis
Tipula (Vestiplex) reposita Starkevich et al. 2015: 122. Locality: India, Laos, Nepal, and Thailand (Chiang Mai).
Tipula reposita
Walker, 1848.
Tipula (Oreomyza) cladomera
Rs is relatively long and cell m1 is petiolate. Tip of eighth sternite has long dense thick setae. Ninth tergite has a U-shaped depression. Lobe of gonostylus is subtriangular and posterior margin has a shallow V-shaped incision with a black sclerotized protuberance. Clasper of gonostylus is small and beak-like.
Male (n = 3): Body length 12–13 mm, wing length 13–14 mm, antenna length 4–4.5 mm.
Head (Figs
Thorax (Figs
Abdomen (Fig.
Tipula (unplaced) reposita Walker, male 38 habitus, later view 39 head and thorax, dorsal view 40 right wing 41 semen pump, ventral view 42 semen pump, dorsal view 43 semen pump, lateral view. aia = anterior immovable apodeme, pia = posterior immovable apodeme, ca = compressor apodeme. Scale bars: 1.0 mm (38–40); 0.5 mm (41–43).
Hypopygium (Figs
Semen pump (Figs
3 males (
Tipula (unplaced) reposita Walker. Male 44 hypopygium, lateral view 45 eighth sternite, ventral view 46 ninth tergite, dorsal view 47 lobe of gonostylus, lateral view 48 clasper of gonostylus, lateral view. tg 8 = eighth tergite, tg 9 = ninth tergite, st 8 = eighth sternite, st 9 = ninth sternite, lg = lobe of gonostylus. Scale bars: 0.5 mm (44–47); 0.25 mm (48).
China (Chongqing), India (Assam), Laos (Tong La, Houaphanh), Nepal, Thailand (Chiang Mai).
Tipula (unplaced) cladomera was proposed by
We are grateful to Dr Liang Wang (Beijing) for collecting the specimens from Laos. We are also particularly grateful to Dr Zacariah Billingham, Dr Matthew J. Petersen, and Dr Chris Borkent for their valuable suggestions on this paper. The research was funded by the National Natural Science Foundation of China (no. 31501880) and the Ministry of Science and Technology of the People’s Republic of China (2005DKA21402).