Research Article |
Corresponding author: Chuntian Zhang ( chuntianzhang@aliyun.com ) Corresponding author: Shuqiang Li ( lisq@ioz.ac.cn ) Academic editor: Yuri Marusik
© 2018 Bing Li, Zhe Zhao, Chuntian Zhang, Shuqiang Li.
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:
Li B, Zhao Z, Zhang C, Li S (2018) Sinodraconarius gen. n., a new genus of Coelotinae spiders from Southwest China (Araneae, Agelenidae). ZooKeys 770: 117-135. https://doi.org/10.3897/zookeys.770.22470
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A new genus of the subfamily Coelotinae F.O. Pickard-Cambridge, 1893, Sinodraconarius gen. n., with four new species, S. cawarongensis sp. n. (♂♀), S. muruoensis sp. n. (♂♀), S. sangjiuensis sp. n. (♂♀, type species), S. yui sp. n. (♂♀) and S. patellabifidus (Wang, 2003) comb. n., ex. Draconarius Ovtchinnikov, 1999 is described. The genus is restricted to Southwest China. Sinodraconarius gen. n. is most similar to Draconarius but can be distinguished by the shape of the copulatory organs. The DNA barcodes of all species were documented for future use.
Asia, taxonomy, new combination, new species
The spider subfamily Coelotinae (Araneae, Agelenidae) comprises 694 valid species belonging to 27 genera worldwide (
Draconarius Ovtchinnikov, 1999, with 246 named species, is the largest genus of Coelotinae. Recent molecular studies suggested that Draconarius is polyphyletic and requires taxonomic rearrangements (
The specimens were examined with a LEICA M205C stereomicroscope. The photographs were captured with an Olympus C7070 wide zoom digital camera (7.1 megapixels) mounted on an Olympus SZX12 dissecting microscope and an Olympus BX51 compound microscope. Photos from multiple focal planes were combined using Helicon Focus (Version 3.00) photo stacking software. Epigynes and male palps were examined after dissection from the spiders’ bodies. Epigynes were cleared by boiling in a 10% potassium hydroxide (KOH) water solution before taking photos of the vulva.
All measurements were obtained using a LEICA M205C stereomicroscope and are in millimeters. Eye sizes were measured as the maximum diameter from either the dorsal or frontal views. Leg measurements are given as: total length (femur, patellatibia, metatarsus, tarsus). The male palps depicted are the left ones. The terminology used in the text and figures follows
Morphological characters:
A epigynal atrium;
ALE anterior lateral eye;
AME anterior median eye;
AME–ALE distance between AME and ALE;
AME–AME distance between AME and AME;
AME–PME distance between AME and PME;
ALE–PLE distance between ALE and PLE;
C conductor;
CD copulatory duct;
CDA conductor dorsal apophysis;
CF cymbial furrow;
CO copulatory opening;
E embolus;
EB embolic base;
FD fertilization duct;
LTA retro-lateral tibial apophysis;
MA median apophysis;
PA patellar apophysis;
PLE posterior lateral eye;
PME posterior median eye;
PME–PLE distance between PME and PLE;
PME–PME distance between PME and PME;
R receptacle;
RTA retroventral tibial apophysis;
ST subtegulum;
T tegulum.
DNA barcodes were obtained for future use. A partial fragment of the mitochondrial cytochrome oxidase subunit I (COI) gene was amplified and sequenced for all species, using the following primers: Forward: LCO1490-oono (5’-CWACAAAYCATARRGATATTGG-3’) and Reverse: C1-N-2776 (5’-GGATAATCAGAATANCGNCGAGG-3’). For additional information on extraction, amplification and sequencing procedures, see
Species | GenBank accession number | Sequence length | Collection localities |
---|---|---|---|
S. cawarongensis sp. n. | KY778914 | 1194bp | Zhowagoin Township, Zayü, Tibet, China |
S. muruoensis sp. n. | KY778913 | 1194bp | Zhowagoin Township, Zayü, Tibet, China |
S. patellabifidus | KY778910 | 1194bp | Liuku Township, Lushui, Yunnan, China |
S. sangjiuensis sp. n. | KY778915 | 1194bp | Zhowagoin Township, Zayü, Tibet, China |
S. yui sp. n. | KY778908 | 1194bp | Segula Mountain, Nyingchi, Tibet, China |
All of the specimens (including molecular vouchers) are deposited in the Institute of Zoology, Chinese Academy of Sciences (IZCAS), Beijing, China.
Sinodraconarius sangjiuensis Zhao & Li, sp. n.
The generic name is derived from its similarity to Draconarius and the Latin adjective Sino- for Chinese referring to the main distribution region of the genus. The gender is masculine.
The males of Sinodraconarius gen. n. are similar to those of Draconarius by having a patellar apophysis, two tibial apophyses (RTA and LTA) and a long median apophysis, but can be distinguished by the short cymbial furrow, less than 1/2 length of cymbium vs. long and generally more than 1/2 length of the cymbium in Draconarius; patellar apophysis bifurcate vs. not bifurcate in Draconarius. The females of Sinodraconarius gen. n. are similar to those of Draconarius by having a small epigynal atrium, with epigynal hoods located laterally, and the copulatory openings located centrally on the epigyne plate, but can be distinguished by lacking epigynal teeth; receptacles simple.
Small to very large sized, with a total length of 6.90–17.60; body brownish to brown, with black setae. Carapace nearly pear-shaped, with longitudinal fovea and radial grooves; sternum brownish, heart-shaped. Abdomen nearly oval, grey to dark grey, with 4–5 grey chevron-like markings. Chelicerae with three promarginal and two retromarginal teeth. Leg formula (4 > 1 > 2 > 3). Male palp with one bifurcate patellar apophysis; two tibial apophyses (RTA and LTA), RTA extending beyond the tibia; cymbial furrow short, less than 1/2 length of cymbium; conductor short, with dorsal conductor apophysis; the apex of conductor with small basal lamella; embolus short; median apophysis long, finger-like; tegulum broad. Tibia strongly bent and dorsal part of tibia and patella bent almost to a right angle, ventral part of tibia at 45° angle. Epigyne: with septum; teeth lacking; atrium small, length of atrium two times longer than width, heart-shaped; epigynal hoods located laterally; copulatory openings located centrally on epigynal plate; copulatory ducts short, extending mesad of receptacles; receptacles broad, widely separated.
In addition to morphological study, we analyzed the relationships of coelotine spiders using eight genes from 286 species in 19 genera (
So far, the genus is known from Tibet and Yunnan, China (Fig.
Holotype ♂ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, Sangjiu Village, Mingqi group, 16 km SE of Yakou, N28.72276°, E97.70598°, 3698 m, 1.IX.2014, Jincheng Liu leg. Paratypes: 3♂♂, 3♀♀ (IZCAS): same data as holotype; 3♂♂ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, Xiongjiu Village, N28.60677°, E97.28166°, 1938 m, 29.VIII.2014, Jincheng Liu leg.
The specific name refers to the type locality, Sangjiu Village; adjective.
The males can be easily distinguished from other Sinodraconarius gen. n. species by the patellar apophysis longer than the tibia vs. shorter than the tibia in other species (Fig.
Male (holotype). Total length 12.25. Carapace 5.75 long, 4.50 wide. Abdomen 6.50 long, 4.00 wide. Eye sizes and interdistances: AME 0.15, ALE 0.23, PME 0.20, PLE 0.23; AME–AME 0.10, AME–ALE 0.15, AME–PME 0.23, ALE–PLE 0, PME–PME 0.18, PME–PLE 0.20. Leg measurements: I 23.72 (7.69, 7.05, 5.77, 3.21); II 22.43 (7.69, 6.41, 5.45, 2.88); III 20.19 (6.73, 5.77, 5.13, 2.56); IV 24.67 (8.01, 7.05, 6.73, 2.88). Palp: patella longer than tibia; patellar apophysis thin and long, about three times longer than wide, with two branches and ventral branch larger than dorsal one; anterior 1/3 of RTA extending beyond the tibia, apex of RTA slightly bent; LTA about half of the RTA length; conductor short, apex of conductor pointed and bent retrolaterally; apex of median apophysis pointed; dorsal conductor apophysis broad, the visible part (between conductor and tegulum) subtriangular; embolus beginning at 5:30 o’clock position (Fig.
Female (paratype). Total length 12.50. Carapace 6.00 long, 4.25 wide. Abdomen 6.50 long, 4.25 wide. Eye sizes and interdistances: AME 0.15, ALE 0.25, PME 0.20, PLE 0.26; AME–AME 0.10, AME–ALE 0.10, AME–PME 0.25, ALE–PLE 0, PME–PME 0.15, PME–PLE 0.30. Leg measurements: I 18.59 (6.41, 6.09, 3.84, 2.25); II 18.27 (6.41, 5.77, 3.84, 2.25); III 17.45 (6.09, 5.27, 3.84, 2.25); IV 21.15 (6.41, 6.41, 5.45, 2.88). Epigyne: apex of the V-shaped septum tapering; atrium two times longer than wide, occupying approx. 1/8 of epigyne plate; copulatory ducts hidden by receptacles in ventral view, hidden by epigyne in dorsal view; receptacles broad and separated by 1/2 width of receptacle; head of receptacles located anteriorly, broad and short, 1/4 length and 1/6 width of receptacles (Fig.
Total length of males 9.94–12.25 (n = 7) and of females 11.22–16.70 (n = 3).
Known only from Zayü, Tibet (Fig.
Holotype ♂ (IZCAS): China: Tibet: Zayü: Cawarong Township, 3.5 km E of Jumuchang, N28.55227°, E98.19554°, 3145 m, 7.IX.2014, Jincheng Liu leg. Paratypes: 13♂♂, 4♀♀ (IZCAS): same data as holotype; 9♂♂, 1♀ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, Ridong Village, N28.49183°, E98.11320°, 3495 m, 4.IX.2014, Jincheng Liu; 6♂♂, 2♀♀ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, 6 km N of Muruo Village, N28.59332°, E98.02774°, 3955 m, 5.IX.2014, Jincheng Liu leg.
The specific name refers to the type locality, Cawarong Township; adjective.
The males are similar to S. patellabifidus by having an indistinct LTA and a long median apophysis but can be differentiated by the branches of the patellar apophysis, with the ventral branch larger than the dorsal branch in retrolateral view vs. the ventral branch equal to the dorsal branch in S. patellabifidus (Figs
Male (holotype). Total length 8.45. Carapace 4.50 long, 3.35 wide. Abdomen 3.95 long, 2.65 wide. Eye sizes and interdistances: AME 0.12, ALE 0.18, PME 0.15, PLE 0.16; AME–AME 0.09, AME–ALE 0.05, AME–PME 0.15, ALE–PLE 0, PME–PME 0.13, PME–PLE 0.15. Leg measurements: I 14.86 (5.25, 4.81, 2.88, 1.92); II 13.99 (5.25, 4.25, 2.88, 1.61); III 13.73 (4.75, 3.85, 3.21, 1.92); IV 16.28 (5.45, 4.49, 4.10, 2.24). Palp: with one crescent-like bifurcate patellar apophysis, ventral branch is larger than dorsal branch of patellar apophysis; anterior 1/5 of RTA extending beyond the tibia; LTA indistinct; cymbial furrow less than 1/3 of cymbium length; apex of conductor pointed and bent retrolaterally; median apophysis finger-like, covered in short hairs; dorsal conductor apophysis broad, the visible part (between conductor and tegulum) subtriangular; embolus broad, beginning at position 8:30 o’clock (Fig.
Female (paratype). Total length 6.90. Carapace 3.40 long, 2.30 wide. Abdomen 3.50 long, 2.50 wide. Eye sizes and interdistances: AME 0.09, ALE 0.16, PME 0.14, PLE 0.15; AME–AME 0.08, AME–ALE 0.05, AME–PME 0.18, ALE–PLE 0, PME–PME 0.13, PME–PLE 0.14. Leg measurements: I 8.68 (3.30, 2.75, 1.66, 0.97); II 8.16 (3.05, 2.49, 1.66, 0.96); III 7.98 (3.15, 2.24, 1.61, 0.98); IV 9.82 (3.75, 2.75, 2.11, 1.21). Epigyne: rectangular; septum indistinct; hoods located anterolaterally on the plate; atrium 3 times longer than wide, anterior part slightly wider than posterior part, occupying about 1/8 of epigynal plate; receptacles broad, separated by a width of a receptacle; the head of receptacles located anteriorly (Fig.
Total length of males (n = 29) 7.69–10.26 and of females (n = 7) 6.90–8.34.
Known only from Zayü, Tibet (Fig.
Holotype ♂ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, Muruo Village, Gaoshan Mountain pasture, N28.62049°, E98.05035°, 4347 m, 5.IX.2014, Jincheng Liu leg. Paratypes: 5♂♂, 3♀♀ (IZCAS): same data as holotype; 1♂, 5♀♀ (IZCAS): China: Tibet: Zayü: Zhowagoin Township, Muruo Village, Qimala Yakou, N28.62049°, E98.05035°, 4657 m, 2.IX.2014, Jincheng Liu leg.
The specific name refers to the type locality, Muruo Village; adjective.
The males of the new species are similar to these of S. sangjiuensis sp. n. by having a ventral branch of the patellar apophysis that is larger than the dorsal branch but can be easily distinguished from S. sangjiuensis sp. n. by the apex of conductor being straight vs. bent in S. sangjiuensis sp. n. (Figs
Male (holotype). Total length 13.50. Carapace 6.50 long, 4.50 wide. Abdomen 7.00 long, 4.00 wide. Eye sizes and interdistances: AME 0.10, ALE 0.23, PME 0.20, PLE 0.25; AME–AME 0.13, AME–ALE 0.15, AME–PME 0.30, ALE–PLE 0, PME–PME 0.20, PME–PLE 0.15. Leg measurements: I 27.84 (8.64, 8.63, 6.73, 3.84); II 27.21 (8.63, 8.65, 6.41, 3.52); III 24.99 (8.01, 7.05, 6.41, 3.52); IV 29.48 (9.62, 8.02, 8.01, 3.83). Palp: with one bifurcate patellar apophysis (ventral branch of patellar apophysis larger than dorsal one) and one small apophysis; LTA indistinct; cymbial furrow short, about 1/5 of the of cymbial length; conductor short, extending anteriorly, the apex of conductor pointed and bending retro-anteriorly; median finger-like; dorsal the visible part of conductor apophysis (between conductor and tegulum) subtriangular, shorter than conductor; embolus beginning at position 7:30 o’clock (Fig.
Female (paratype). Total length 11.00. Carapace 5.00 long, 4.00 wide. Abdomen 6.00 long, 4.00 wide. Eye sizes and interdistances: AME 0.15, ALE 0.22, PME 0.20, PLE 0.24; AME–AME 0.10, AME–ALE 0.10, AME–PME 0.15, ALE–PLE 0, PME–PME 0.15, PME–PLE 0.25. Leg measurements: I 16.88 (6.08, 5.44, 3.12, 2.24); II 15.69 (6.08, 4.48, 3.21, 1.92); III 15.40 (5.77, 4.49, 3.23, 1.91); IV 18.58 (6.73, 5.12, 4.81, 1.92). Epigyne: with V-shaped septum, apex of septum tapering; hoods located laterally; atrium two times wider than long, occupying approx. 1/7 of epigynal plate; receptacles separated by the width of a receptacle; the head of the receptacles broad, short, located anteriorly (Fig.
Total length of males (n = 7) 11.86–17.60 and of females (n = 8) 6.90–11.00.
Known only from Zayü, Tibet (Fig.
Draconarius
patellabifidus
2♀♀ (IZCAS): China: Yunnan Province: Nujiang Lisu Autonomous Prefecture: Lushui County, Liuku Township, N25.80797°, E98.84226°, 1220 m,18.IX.2014, Jincheng Liu leg.; 1♂, 1♀ (IZCAS): China: Yunnan Province: Nujiang Lisu Autonomous Prefecture: Lushui County, Luzhang Township, Fengxue Yakou, N25.97244°, E98.68376°, 3150 m, 19.IX.2014, Jincheng Liu leg.
The males can be differentiated from S. sangjiuensis sp. n. by the ventral branch of the patellar apophysis which is the same length as the dorsal branch vs. larger than dorsal one in S. sangjiuensis sp. n. (Figs
Described by
Total length of females (n = 3) 8.75–11.80.
Known only from Yunnan (Fig.
Coelotes
himalayaensis
Draconarius
himalayaensis
Holotype ♂ (IZCAS): China: Tibet: Nyingchi: Segula Mountain, N29.605017°, E94.609117°, 4184 ± 4 m, 11.X.2010, Hao Yu leg. Paratypes: 2♂♂ (IZCAS): same data as holotype; 1♀ (IZCAS): China: Tibet: Nyingchi: Positive face of Segula Mountain, N29.607583°, E94.608767°, 4190 ± 13 m, 12.VIII.2010, Hao Yu leg.
The specific name is after Hao Yu, the collector of specimens used in this study; noun (name) in genitive case.
The males are similar to these of S. sangjiuensis sp. n. by the ventral branch of the patellar apophysis larger than dorsal one and the apex of the conductor pointed and bent retrolaterally, but can be easily distinguished from S. sangjiuensis sp. n. by the short palp (Figs
Male (holotype). Total length 7.59. Carapace 4.00 long, 2.60 wide. Abdomen 3.59 long, 2.56 wide. Eye sizes and interdistances: AME 0.09, ALE 0.20, PME 0.14, PLE 0.19; AME–AME 0.08, AME–ALE 0.05, AME–PME 0.16, ALE–PLE 0, PME–PME 0.09, PME–PLE 0.13. Leg measurements: I 12.15 (4.06, 4.00, 2.68, 1.41); II 10.22 (3.44, 3.50, 2.03, 1.25); III 9.99 (3.28, 3.00, 2.40, 1.31); IV 12.82 (4.06, 3.80, 3.40, 1.56). Palp: ventral branch of patellar apophysis larger than dorsal one; anterior 1/5 part of RTA extending beyond the tibia; LTA obvious; cymbial furrow less than 1/4 of cymbium length; the apex of conductor concave and spiral; median apophysis conspicuous, finger-like, the apex of the median apophysis expanded and open; dorsal conductor apophysis broad, the visible part (between conductor and tegulum) hidden by conductor in ventral view; embolus beginning at position 10 o’clock (Fig.
Female (paratype). Total length 7.89. Carapace 3.40 long, 2.40 wide. Abdomen 4.49 long, 2.40 wide. Eye sizes and interdistances: AME 0.10, ALE 0.18, PME 0.15, PLE 0.15; AME–AME 0.11, AME–ALE 0.06, AME–PME 0.15, ALE–PLE 0, PME–PME 0.10, PME–PLE 0.15. Leg measurements: I 9.17 (3.58, 2.88, 1.75, 0.96); II 8.66 (3.07, 2.88, 1.75, 0.96); III 8.47 (3.20, 2.56, 1.75, 0.96); IV 11.05 (3.59, 3.52, 2.50, 1.44). Epigyne: apex of the V-shaped septum tapering; hoods located laterally; atrium two times wider than long, occupying approx. 1/4 of epigynal plate; receptacles spaced by the width of a receptacle; the head of the receptacles broad and short, located anteriorly (Fig.
The male of the new species was first described by
Total length of males (n = 3) 7.05–7.59.
The manuscript benefitted greatly from comments by Yuri M. Marusik, Yanfeng Tong, Mykola Kovblyuk and Mikhail Omelko. Sarah Crews kindly checked English. Xiaoqing Zhang and Francesco Ballarin checked an early version of the manuscript. This study was supported by the National Natural Sciences Foundation of China (NSFC) to Zhe Zhao (NSFC-31772418), Chuntian Zhang (NSFC-31750002) and Shuqiang Li (NSFC-31530067, 31471960).