Meta yinae, Wang & Zhou & Irfan & Yang & Peng, 2020

Wang, Luyu, Zhou, Guchun, Irfan, Muhammad, Yang, Sufang & Peng, Xianjin, 2020, Five new species of Meta Koch, 1836 (Araneae: Tetragnathidae) from Gaoligong Mountains, China, European Journal of Taxonomy 624, pp. 1-25 : 18-23

Meta yinae sp. nov.

urn:lsid:zoobank.org:act:07066DE2-94F3-431C-A28C-5ED596CA782B

Figs 1 G–H, 13–15

Differential diagnosis

Meta yinae sp. nov. can be distinguished from the other Chinese Meta species by the wide conductor, the Y-shaped cymbial ectobasal process of the male palp ( Figs 13 , 15 A–C), and the bean-shaped spermathecae of the epigyne ( Figs 14B , 15E ). Meta yinae sp. nov. resembles M. yani sp. nov. ( Figs 10– 12 ), but can be distinguished from the latter by the following characters. Metaine embolic apophysis not bifurcated in ventral view in M. yinae sp. nov. ( Figs 13D , 15B ), bifurcated in M. yani sp. nov. ( Figs 10D , 12B ). The spine-like apophysis of the cymbial ectobasal process arises from the top of CEP and points towards the genital bulb in M. yinae sp. nov. ( Figs 13B , 15C ), it forms the median portion of CEP and points towards the cymbium in M. yani sp. nov. ( Figs 10B , 12C ). The posterior margin of the epigynal plate almost round in M. yinae sp. nov. ( Figs 14A , 15D ), centrally incised in M. yani sp. nov. ( Figs 11A , 12D ). Spermathecae longitudinal, present posteriorly in M. yinae sp. nov. ( Figs 14B , 15E ), whereas horizontal, present anteriorly in M. yani sp. nov. ( Figs 11B , 12E ).

Etymology

The specific epithet is taken from the family name of Prof. Changmin Yin, in honour of her great contribution to Chinese arachnology; noun.

Type material

Holotype

CHINA • ♂; Yunnan Province, Fugong County, Pihe Township, Yueliangtian Village ; 26°34′04″ N, 98°54′32″ E; alt. 1520 m; 20–24 Aug. 2005; G. Tang leg.; HNU-Tang-05-08.

Paratypes (15 ♂♂ and 18 ♀♀)

CHINA – Yunnan Province – Fugong County • 7 ♂♂, 13 ♀♀; same collection data as for holotype; HNU-Tang-05-08 • 1 ♂; Lumadeng Township, Yaping Village, 7.2 km up of Shibali; 27°10′47″ N, 98°43′35″ E; alt. 3059 m; 4 May 2004; H.M. Yan and G.X. Peng leg.; HNU-20040504-3 • 1 ♂, 3 ♀♀; 10.1–11.5 km from Shibali to Yaping; 27°12′02″ N, 98°42′49″ E– 27°12′24″ N, 98°43′03″ E; alt. 3225– 3290 m; 8 May 2004; C. Griswold and D.H. Kavanaugh leg.; HNU-CGY40 • 1 ♀; Lumadeng Township, Yaping Village, Yaping Yakou ; 27°10′47″ N, 98°43′35″ E; alt. 3280– 3100 m; 8 May 2004; H.M. Yan leg.; HNU-20040508 . – Lushui County • 2 ♂♂; Luzhang Township, Yaojiaping Forest Station ; 25°58′31″ N, 98°42′36″ E; alt. 2515 m; 20 May 2005; K.J. Guo leg.; HNU-GKJ013 . – Longyang County • 1 ♂; Bawan Township, Sancha River, Luoshuidong area ; 24°55′33″ N, 98°45′29″ E; alt. 2300 m; 3 June 2005; Charles Griswold leg.; HNU-CGY137 . – Tengchong County • 1 ♂; Jietou Township, No. 8 Boundary Post of Yakou ; 25°48′32″ N, 98°37′15″ E; alt. 2890 m; 23 May 2006; X.J. Peng, X.P. Wang and P. Hu leg.; HNU-Wang060523-2 . – Gongshan County • 1 ♀; Cicai Township, Dahaituo ; 27°47′04″ N, 98°27′37″ E; alt. 3363 m; 13 Aug. 2006; P. Hu leg.; HNU-Hu060813 • 1 ♂; Qiqi No. 12 bridge ; 27°42′59″ N, 98°30′11″ E; alt. 2738 m; 28 Sep. 2007; X.J. Peng leg.; HNU-20070928 • 1 ♂; Qiqi Dongshaofang ; 27°41′43″ N, 98°29′07″ E; alt. 3208 m; 29 Sep. 2007; X.J. Peng leg.; HNU-20070929 .

Description

Male (holotype, Fig. 1G )

MEASUREMENTS. Total length 5.29. Prosoma 2.45 long, 2.00 wide; opisthosoma 3.28 long, 1.95 wide. Eye sizes and interdistances: AME 0.14, ALE 0.16, PME 0.15, PLE 0.16; AME–AME 0.09, AME–ALE 0.13, PME–PME 0.09, PME–PLE 0.19, ALE–PLE 0.03. MOA 0.44 long, front width 0.37, back width 0.42. Clypeus 0.11 high.

CHELICERAE. Strong, brown, with three promarginal and four retromarginal teeth.

GNATHOCOXAE AND LABIUM. Brown, longer than wide.

DORSUM OF PROSOMA. Yellowish brown, with longitudinal dark brown band. Cervical groove distinct, radial furrows indistinct ( Fig. 1G ).

STERNUM. Brown, scutellate, with sparse brown hairs.

LEGS. Brown, with annuli. Length of legs: I, 13.40 (3.82, 4.68, 3.41, 1.49); II, 10.48 (3.02, 3.73, 2.51, 1.22); III, 6.00 (2.01, 1.89, 1.39, 0.71); IV, 7.71 (2.50, 2.45, 1.91, 0.85). Leg formula: 1243.

OPISTHOSOMA. Oval, dorsum with two pairs of sigillae, yellowish brown, with several irregular black markings ( Fig. 1G ). Venter of opisthosoma yellowish brown, with black markings.

PALP ( Figs 13 , 15 A–C). Cymbial ectobasal process Y-shaped, with hook-shaped tip. Paracymbium strong and rod-like, with sparse long, brown hairs. Metaine embolic apophysis longer than wide, tongueshaped. Embolus long, thin, proximally covered by conductor. Conductor longer than wide, slightly curved, arising meso-retrolaterally from bulb, extending clockwise, with a membranous end.

Female (HNU-Tang-05-08, Fig. 1H )

MEASUREMENTS. Total length 6.17. Prosoma 2.44 long, 2.09 wide; opisthosoma 4.25 long, 3.38 wide. Eye sizes and interdistances: AME 0.15, ALE 0.18, PME 0.17, PLE 0.16; AME–AME 0.09, AME–ALE 0.14, PME–PME 0.10, PME–PLE 0.18,ALE–PLE 0.04. MOA anterior width 0.39, posterior width 0.45, anterior width 0.46. Clypeus 0.12 high.

LEGS. Leg measurements: I, 11.06 (3.20, 3.86, 2.73, 1.27); II, 8.53 (2.52, 3.01, 2.03, 0.97); III, 5.07 (1.63, 1.68, 1.10, 0.66); IV, 7.18 (2.35, 2.45, 1.65, 0.73).Leg formula: 1243. Other morphological characteristics same as in male.

EPIGYNE ( Figs 14 , 15 D–E). Copulatory ducts thick and short. Spermathecae bean-shaped, present posteriorly. Fertilization ducts relatively long and thick.

Variation

The total length in male specimens examined ranges from 4.79 to 5.29, in female specimens from 4.95 to 6.74.

Distribution

China, Yunnan Province (Fugong, Lushui, Longyang, Tengchong, Gongshan) ( Fig. 16 ).

Figures

Fig. 1. Meta hamata sp. nov. (A–B), Meta longlingensis sp. nov. (I), Meta tangi sp. nov. (C–D), Meta yani sp. nov. (E–F), Meta yinae sp. nov. (G–H). A, C, E, G, I. Male holotype habitus, dorsal view. B, D, F, H. Female paratype habitus, dorsal view. Scale bars: 1 mm.

Fig. 13. Meta yinaesp. nov.Left palp of holotype♂(HNU-Tang-05-08).A. Prolateral view.B. Retrolateral view. C. Dorsal view. D. Ventral view. Scale bars: 0.2 mm.

Fig. 15. Meta yinae sp. nov. Left palp of holotype ♂ (A–C); epigyne (D) and vulva (E) of paratype ♀ (HNU-Tang-05-08). A. Prolateral view. B. Ventral view. C. Retrolateral view. D. Epigyne, ventral view. E. Vulva, front view. Scale bars: 0.2 mm.

Fig. 14. Meta yinae sp. nov. Paratype ♀ (HNU-Tang-05-08). A. Epigyne, ventral view. B. Vulva, front view. Scale bars: 0.2 mm.

Fig. 10. Meta yanisp. nov. Left palp of holotype♂ (HNU-Yan021004). A. Prolateral view. B. Retrolateral view. C. Dorsal view. D. Ventral view. Scale bars: 0.2 mm.

Fig. 11. Meta yani sp. nov. Paratype ♀ (HNU-Yan021004). A. Epigyne, ventral view. B. Vulva, front view. Scale bars: 0.2 mm.

Fig. 12. Meta yani sp. nov. Left palp of holotype ♂ (A–C); epigyne (D) and vulva (E) of paratype ♀ (HNU-Yan021004). A. Prolateral view. B. Ventral view. C. Retrolateral view. D. Epigyne, ventral view. E. Vulva, front view. Scale bars: 0.2 mm.

Fig. 16. Distribution records of five new species of the genus Meta Koch, 1836 in Gaoligong Mountains, Yunnan, China.