Myrmarachne xingrenensis 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 : 16-19

Myrmarachne xingrenensis Wang, Mi & Peng sp. nov.

urn:lsid:zoobank.org:act:63AE31F5-41A6-47A9-B4FB-70CD1B55970A

Figs 8–9 , 56

Diagnosis

The male of Myrmarachne xingrenensis sp. nov. resembles that of M. circulus Xiao & Wang, 2004 in having a broad embolus, but it can be easily distinguished by the following: (1) the chelicera is shorter than the carapace ( Fig. 9C–D ) whereas longer than carapace in M. circulus ( Xiao & Wang 2004: fig. 1); (2) the RTA is strongly concave medially ( Fig. 8B–D ), whereas not concave in M. circulus ( Xiao & Wang 2004: figs 3–4). The female also resembles that of M. circulus in having a posteromedially located epigynal hood, and prominent spermathecae, but it can be distinguished by the following: (1) the epigynal hood is longer than wide ( Fig. 9A ), whereas wider than long in M. circulus ( Xiao & Wang 2004: figs 6–7); (2) the epigyne has a pair of hood-shaped structures anterolateral to atria ( Fig. 9A ), whereas absent in M. circulus ( Xiao & Wang 2004: figs 6–7).

Etymology

The species name is derived from the name of the type locality, Xingren County; adjective.

Type material

Holotype

CHINA • ♂; Guizhou, Xingren County, Luchuying Township, Qingshuihe Nature Reserve , Mabaoshu Grand Canyon ; 25°17.79′ N, 104°56.13′ E; 1270 m a.s.l.; 3 Aug. 2016; C. Wang et al. leg.; TRU-JS 0087.

Paratypes

CHINA • 13 ♀♀, 13 ♂♂; same collection data as for holotype; TRU-JS 0088–0113 .

Description

Male (holotype)

MEASUREMENTS. Total length 4.77. Carapace 2.15 long, 1.19 wide. Abdomen 2.54 long, 1.19 wide. Eye sizes and inter-distances: AME 0.39, ALE 0.22, PLE 0.20, AERW 1.22, PERW 1.26, EFL 1.01. Legs: I 5.50 (1.63, 0.78, 1.75, 0.85, 0.49), II 4.01 (1.15, 0.58, 1.08, 0.76, 0.44), III 4.54 (1.32, 0.55, 1.13, 1.05, 0.49), IV 6.54 (1.93, 0.68, 1.78, 1.59, 0.56).

HABITUS. Carapace yellow-red to dark, covered with thin setae at anterior margin ( Fig. 9C ). Chelicerae with six teeth on both retromargin and promargin ( Fig. 9F ). Sternum elongated, almost 2.2 times as long as wide. Legs yellow to red-brown, with one, five, and two pairs of ventral macrosetae on patellae, tibiae, and metatarsi I, respectively ( Fig. 9D ). Abdomen elongated, dorsum mahogany brown, with a pair of anterolateral white stripes, covered by big scutum; venter gray-brown, with broad, longitudinal, brown band medially ( Fig. 9C–D ).

PALP. Tibia slightly longer than wide; RTA almost S-shaped in ventral view and strongly concave medially, tapered to pointed tip curved towards cymbium in retrolateral view; bulb almost round, with sperm duct extended along prolateral margin and curved into S-shape terminally; embolus broad and flat, coiled with two spirals, apically reaching to antero-retrolateral margin of cymbium ( Fig. 8 ).

Female (paratype, TRU-JS 0088)

MEASUREMENTS. Total length 5.88. Carapace 2.60 long, 1.30 wide. Abdomen 2.85 long, 1.40 wide. Eye sizes and inter-distances: AME 0.46, ALE 0.24, PLE 0.22, AERW 1.32, PERW 1.34, EFL 1.08. Legs: I 5.47 (1.63, 0.85, 1.65, 0.83, 0.51), II 4.24 (1.24, 0.65, 1.15, 0.76, 0.44), III 4.95 (1.41, 0.63, 1.20, 1.22, 0.49), IV 7.47 (2.20, 0.78, 2.15, 1.83, 0.51).

HABITUS. Similar to that of male except paler in color, and with seven cheliceral teeth on both retromargin and promargin ( Fig. 9E, G ).

EPIGYNE. With a pair of hood-shaped structures anterolateral to oval atria, and bell-shaped posterior hood far away from epigastric furrow about 1.6 times its length; sclerotized portions of copulatory ducts swollen at beginning and curved about 100° proximally, and then ascending to connect to posterior edges of spermathecae; spermathecae sub-spherical, touched; fertilization ducts originate from middle of inner edges of spermathecae, transversely extended ( Fig. 9A–B ).

Distribution

China (Guizhou) ( Fig. 56 ).

Figures

Fig. 8. Male palp of Myrmarachne xingrenensis Wang, Mi & Peng sp. nov., holotype (TRU-JS 0087). A. Prolateral view. B. Ventral view. C. Retrolateral view. D. RTA, retrolateral view. Abbreviations: see Material and methods. Scale bars = 0.1 mm.

Fig. 9. Myrmarachne xingrenensis Wang, Mi & Peng sp. nov. A–B, E, G. Paratype, ♀ (TRU-JS 0088). C–D, F. Holotype, ♂ (TRU-JS 0087). A. Epigyne, ventral view. B. Vulva, dorsal view. C–E. Habitus. C. Dorsal view. D. Ventral view. E. Dorsal view. F–G. Chelicera, posterior view. Abbreviations: see Material and methods. Scale bars: A–B, G = 0.1 mm; C–E = 0.5 mm; F = 0.2 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.