Myrmarachne yinae Wang, Mi & Peng, 2023

Wang, Cheng, Mi, Xiao-Qi, Wang, Wei-Hang, Gan, Jia-Hui, Irfan, Muhammad, Zhong, Yang & Peng, Xian-Jin, 2023, Notes on twenty-nine species of jumping spiders from South China (Araneae: Salticidae), European Journal of Taxonomy 902, pp. 1-91 : 19-22

Myrmarachne yinae Wang, Mi & Peng sp. nov.

urn:lsid:zoobank.org:act:A7D47CA2-0093-4219-802A-6D98FF0496A9

Figs 10–11 , 56

Diagnosis

The female of Myrmarachne yinae sp. nov. can be easily distinguished from other congeners by the epigyne having a pair of wing-shaped dorsolateral plates and an upwards opened hood ( Fig. 11A–C ), whereas similar plates being absent and with downwards or laterally opened hood in others ( Metzner 2023). The male closely resembles that of M. concava Zhu, Zhang, Zhang & Chen, 2005 in palpal structure, but it can be distinguished by the RTA, which is curved into a pointed tip directed towards the dorsal side in retrolateral view ( Fig. 10C ), whereas straight and acutely narrowed to a pointed tip directed upward in M. concava ( Zhu et al. 2005: fig. 10f).

Etymology

The specific name is a patronym in honor of the late Prof. Changmin Yin, one of the pioneers of spider taxonomy of China; noun (name) in genitive case.

Type material

Holotype

CHINA • ♀; Guizhou, Suiyang County, Kuankuoshui National Nature Reserve, Zhubaotai ; 28°12.71′ N, 107°10.01′ E; 1513 m a.s.l.; 26 Jul. 2015; C. Wang et al. leg.; TRU-JS 0114 .

Paratypes

CHINA • 2 ♀♀, 1 ♂; same collection data as for holotype; TRU-JS 0115–0117 • 2 ♀♀; Yinjiang County, Ziwei Township , Fanjing Mountain National Nature Reserve , Huguosi; 27°54.54′ N, 108°46.57′ E; 1655 m a.s.l.; 9 May 2020; X.Q. Mi et al. leg.; TRU-JS 0118–0119 • 2 ♂♂; same collection data as for preceding; 21 Jul. 2021; TRU-JS 0120–0121 .

Description

Female (holotype)

MEASUREMENTS. Total length 6.18. Carapace 2.64 long, 1.37 wide. Abdomen 3.42 long, 1.53 wide. Eye sizes and interdistances: AME 0.47, ALE 0.24, PLE 0.24, AERW 1.36, PERW 1.42, EFL 1.03. Legs: I 4.83 (1.45, 0.78, 1.45, 0.75, 0.40), II 3.82 (1.13, 0.63, 1.01, 0.65, 0.40), III 4.41 (1.25, 0.58, 1.05, 1.08, 0.45), IV 6.46 (1.88, 0.75, 1.75, 1.58, 0.50).

HABITUS. Carapace dark brown except yellow-brown on cervical groove area, cephalic region elevated, square, covered with gray-white, thin setae ( Fig. 11D–E ). Chelicerae with six teeth on both retromargin and promargin ( Fig. 11H ). Sternum narrow, about 2.5 times as long as wide ( Fig. 11F ). Legs yellow to red-brown, with two, six, and two pairs of macrosetae on venter of patellae, tibiae, and metatarsi I, respectively ( Fig. 11D ). Abdomen elongated, constricted anteromedially, dorsum with alternate transverse dark brown and yellow bands; venter pale yellow ( Fig. 11D–F ).

EPIGYNE. With small, upward opened, cup-shaped posterior hood, and a pair of wing-shaped, sclerotized dorsolateral plates; atrium broad, sub-trapezoidal, with a pair of lateral ridges and two pairs of wrinkles; copulatory openings posterolaterally located, slit-shaped; sclerotized portions of copulatory ducts broadened, curved and with a pair of accessory glands at proximal portions, and then extended anteriorly, and coiled with five spirals at terminus; spermathecae tube-shaped; fertilization ducts slender, extended anterolaterally ( Fig. 11A–C ).

Male (paratype, TRU-JS 0117)

MEASUREMENTS. Total length 4.89. Carapace 2.16 long, 1.33 wide. Abdomen 2.51 long, 1.05 wide. Eye sizes and interdistances: AME 0.42, ALE 0.22, PLE 0.22, AERW 1.27, PERW 1.31, EFL 1.02. Legs: I 4.94 (1.48, 0.75, 1.45, 0.78, 0.48), II 3.91 (1.13, 0.60, 1.10, 0.68, 0.40), III 4.35 (1.25, 0.55, 1.05, 1.00, 0.50), IV 5.96 (1.70, 0.70, 1.63, 1.43, 0.50).

HABITUS. Similar to that of female except paler in color, and with more well-developed chelicerae ( Fig. 11G ).

PALP. Tibia longer than wide, with lamellar flange fused with RTA basally; RTA twisted, curved, and extended towards dorsal side distally in retrolateral view; cymbium setose, with cluster of dense, dark setae dorsomedially, and sub-triangular, baso-retrolateral apophysis in ventral view; bulb oval; embolus long, coiled with about two spirals, distal portion flagelliform ( Fig. 10 ).

Distribution

China (Guizhou) ( Fig. 56 ).

Figures

Fig. 10. Male palp of Myrmarachne yinae Wang, Mi & Peng sp. nov., paratype (TRU-JS 0117). A. Prolateral view. B. Ventral view. C. Retrolateral view. Abbreviations: see Material and methods. Scale bars = 0.2 mm.

Fig. 11. Myrmarachne yinae Wang, Mi & Peng sp. nov. A–F, H. Holotype, ♀ (TRU-JS 0114). G, I. Paratype, ♂ (TRU-JS 0117). A. Epigyne, ventral view. B–C. Vulva, dorsal view. D–G. Habitus. D. Dorsal view. E. Lateral view. F. Ventral view. G. Dorsal view. H–I. Chelicera, posterior view. Abbreviations: see Material and methods. Scale bars: A–C, H, I = 0.1 mm; D–G = 0.5 mm.

Fig. 56. Distributional records of Brettus anchorum Wanless, 1979, Heliophanoides proszynskii Wang, Mi & Peng sp. nov., Icius indicus (Simon, 1901), Myrmarachne xingrenensis Wang, Mi & Peng sp. nov. and M. yinae Wang, Mi & Peng sp. nov.