Myrmarachne liui, Wang & Li, 2021

Wang, Cheng & Li, Shuqiang, 2021, On ten species of jumping spiders from Xishuangbanna, China (Araneae, Salticidae), ZooKeys 1062, pp. 123-155 : 123

Myrmarachne liui sp. nov.

Figs 8 , 9

Type material.

Holotype ♂ (IZCAS-Ar42599), China: Yunnan: Xishuangbanna, Mengla County, Menglun Town, XTBG, tropical rainforest (21°55.20'N, 101°16.21'E, ca. 550 m), 07.viii.2018, C. Wang leg. Paratypes 1♀ (IZCAS-Ar42600), same data as holotype; 4♀1♂ (IZCAS-Ar42601-42605), site #3 of garbage dump off G213 roadside (21°54.34'N, 101°16.79'E, ca. 620 m), 2.v.2019, Y. Tong leg.; 5♀2♂ (IZCAS-Ar42606-42612), site #3 of garbage dump off G213 roadside (21°53.92'N, 101°16.01'E, ca. 560 m), 3.v.2019, Y. Tong leg.; 2♂ (IZCAS-Ar42613-42614), site #6 of garbage dump off G213 roadside (21°54.33'N, 101°16.79'E, ca. 620 m), 7.v.2019, Y. Tong leg.

Etymology.

The specific name is a patronym in honor of Mr. Hong Liu (Tongren, China), one of the collectors of the new species; noun (name) in genitive case.

Diagnosis.

The male of Myrmarachne liui sp. nov. closely resembles that of M. cornuta Badcock, 1918 in having a similar habitus and palpal structure, but it differs by the following: 1) the second embolic coil is almost 2/3 the bulb width (Fig. 8B ) vs. almost 4/5 the bulb width in M. cornuta ( Edmunds and Prószyński 2003: fig. 33); 2) the retrolateral tibial apophysis is directed anteriorly in retrolateral view (Fig. 8B ) vs. directed towards the bulb in M. cornuta ( Edmunds and Prószyński 2003: fig. 35). The male is also similar to M. contracta (Karsch, 1880) in habitus and palpal structure, but it can be easily distinguished from the latter by having a large, truncated first apical promarginal cheliceral tooth (Fig. 9C, E, G ) vs. absent in M. contracta ( Edwards and Benjamin 2009: fig. 1D, H). The female of this new species is similar to M. jianfenglin Barrion, Barrion-Dupo & Heong, 2013 but differs by: 1) the epigynal hoods separate from each other by half their minimum width (Fig. 9A ) vs. fused in M. jianfenglin ( Barrion et al. 2013: fig. 25D); 2) the chelicerae, with seven promarginal and nine retromarginal teeth (Fig. 9H ) vs. four promarginal and eight retromarginal teeth in M. jianfenglin ( Barrion et al. 2013: fig. 25B).

Description.

Male (Figs 8 , 9C-E, G ). Total length 6.84. Carapace 2.41 long, 1.29 wide. Abdomen 3.15 long, 0.85 wide. Clypeus 0.07 high. Eye sizes and inter-distances: AME 0.41, ALE 0.24, PLE 0.22, AERW 1.22, PERW 1.24, EFL 0.92. Legs: I 3.77 (1.18, 1.63, 0.63, 0.33), II 2.98 (0.95, 1.15, 0.55, 0.33), III 3.29 (1.01, 1.15, 0.78, 0.35), IV 4.73 (1.45, 1.80, 1.13, 0.35). Carapace dark brown, strongly constricted between cephalic and thoracic parts, with clusters of white setae at lateral margins of constriction. Chelicerae well-developed, with 7 promarginal and 8 retromarginal teeth; first apical promarginal tooth truncated, the third one longest. Pedicel almost 2/5 abdomen length. Endites yellow-brown to dark brown. Labium colored as endites. Sternum dark, narrow, more than 3 times longer than wide. Legs I, II off-yellow, except metatarsi and tarsi red-brown, with dark brown femoral stripes laterally; legs III and IV off-yellow to dark brown. Abdomen elongated, constricted anteromedially; dorsum dark brown, with indistinct markings medially; venter slightly paler than dorsum.

Palp (Fig. 8A-C ): femur about 3 times longer than wide; tibia longer than wide, with a sub-square flange and a sclerotized retrolateral apophysis curved and twisted into a pointed tip in retrolateral view; cymbium almost 1.5 times longer than wide in ventral view, and with an apical spine; bulb almost round, with tapered, S-shaped sperm duct; embolus coiled, tapered, with 2 circles.

Female (Fig. 9A, B, F, H ). Total length 7.22. Carapace 2.70 long, 1.15 wide. Abdomen 2.78 long, 0.93 wide. Clypeus 0.07 high. Eye sizes and inter-distances: AME 0.40, ALE 0.20, PLE 0.20, AERW 1.12, PERW 1.20, EFL 0.88. Legs: I 3.19 (1.03, 1.33, 0.50, 0.33), II 2.76 (0.90, 1.08, 0.45, 0.33), III 3.24 (1.01, 1.13, 0.75, 0.35), IV 4.90 (1.50, 1.88, 1.12, 0.40). Habitus similar to that of male except chelicerae less developed, with 9 retromarginal teeth.

Epigyne (Fig. 9A, B ): longer than wide, with pair of bell-shaped posterior hoods separated from each other by about 1/2 their minimum width; atrium almost trapeziform, with pair of arc-shaped lateral ridges; copulatory openings slit-shaped, located anteromedially on atrium; copulatory ducts membranous at origin, leading to a sclerotized part, slightly curved at base, then extending anteriorly along longitudinal axis, twisted into 2 loops, connected to oval spermathecae; fertilization ducts originate from posterior portion of spermathecae, lamellar.

Distribution.

Known only from the type locality in Yunnan, China.

Figures

Figure 8. Male palp of Myrmarachne liui sp. nov., holotype A prolateral B ventral C retrolateral. Scale bars: 0.1.

Figure 9. Female paratype and male holotype of Myrmarachne liui sp. nov. A epigyne, ventral B vulva, dorsal C holotype habitus, dorsal D lateral E ventral F female paratype habitus, dorsal G holotype left chelicera, posterior H female paratype left chelicera, posterior. Scale bars: 0.1 (A, B, H); 1.0 (C-F); 0.5 (G).