Lysiteles longensis, Zhang & Zhang, 2023

Zhang, Rui & Zhang, Feng, 2023, Two new species of crab spiders from Xiaolong Mountains in Gansu Province, China (Araneae, Thomisidae), ZooKeys 1160, pp. 75-87 : 75

Lysiteles longensis sp. nov.

Figs 9-12 , 13, 14 , 15-16

Type material.

Holotype: ♂, China: Gansu Province, Qingshui County, Shanmen town, Shanmen village, 34°40.72'N, 106°23.98'E, 1735 m, 22 May 2021, Rui Zhang leg. Paratypes: 2♂6♀, with same data as holotype; 2♂9♀, Dangchuan town, 34°19.73'N, 105°15.77'E, 1711 m, 24 May 2021, Zhaoyi Li leg.; 1♂3♀, Qingshui County, Shanmen town, Shanmen village, 34°42.32'N, 106°25.1'E, 1635 m, 3 August 2021, Rui Zhang leg.; 3♂6♀, Qingshui County, Shanmen town, Daji village, 34°37.45'N, 106°20.25'E, 1784 m, 23 June 2022, Xinyuan Bai leg.

Etymology.

The specific name refers to the type locality. “Long” is a short name for Gansu, adjective.

Diagnosis.

Male L. longensis sp. nov. is similar to that of L. silvanus Ono, 1980 (see Ono 1980: 212, figs 28-30) in having a long RTA and twisted embolus, but it differs by the following combination of characters: (1) tegulum large and reniform, ca 3/4 of cymbium cavity (vs small, semicircular, and ca 1/2 of cymbium cavity); (2) the lowest point of embolus above the tegulum (vs the lowest point at 1/2 of the tegulum); (3) RTA straight, pointing dorsally (vs RTA flexed, pointing ventrally). Female is similar to that of L. silvanus (see Ono 1980: 212, figs 25-27) in having a broad atrium with a sclerotized, transversally extending plate and widely separated copulatory openings, but it can be easily distinguished by the short, thick, and spherical copulatory duct (vs slender and strongly twisted).

Description.

Male (holotype). Habitus as in Figs 9 , 10 . Total length 2.89. Carapace 1.31 long, 1.19 wide. Opisthosoma 1.58 long, 1.19 wide. Carapace reddish brown. Eye sizes and interdistances: AME 0.06, ALE 0.11, PME 0.04, PLE 0.08, AME-AME 0.14, AME-ALE 0.13, PME-PME 0.25, PME-PLE 0.24, AME-PME 0.25, ALE-PLE 0.23. MOA 0.24 long, front width 0.26, back width 0.33. Chelicerae, labium and maxillae blackish brown. Legs yellowish and spinous. Leg measurements: I 4.83 (1.37, 0.46, 1.18, 1.06, 0.76); II 5.06 (1.41, 0.55, 1.28, 1.04, 0.78); III 2.88 (0.86, 0.40, 0.79, 0.45, 0.38); IV 2.93 (0.84, 0.39, 0.82, 0.49, 0.39). Leg spination: I Fe: d3, p3; Ti: d3, p1, r1, v4; Mt: p3, r3, v1; II Fe: d3, p2; Pa: d2, p1, r1; Ti: d1, p3, r2, v3; Mt: p3, r3, v4; III Fe: d3; Pa: d1, r1; Ti: d1, p2, r1; Mt: p2, r1; IV: Fe: d4; Pa: d1, r1; Ti: d2, p2, r2; Mt: p1, r1. Opisthosoma dorsum blackish brown, anterior with longitudinal reddish-brown stripe, posterior part with 3 transverse, reddish-brown stripes, and lateral with many small, scattered, brown spots; venter with 4 pairs of longitudinal yellow spots in the middle; spinnerets brown.

Palp (Figs 13 , 14 ). Retrolateral tibial apophysis longer than tibia, with small, basal protuberance (Fig. 14 ), apically pointed; ventral tibia apophysis digitiform, 1.5 × longer than wide, short and broad, apically curved; extending along tegular margin. Embolus with thick base and a strong, dorsally bent apical end. Tip lopped and in counterclockwise direction, base at about 10 o’clock, tip at about 2 o’clock; tegulum as long as wide.

Female. Habitus as in Figs 11 , 12 . Total length 3.27. Prosoma 1.38 long, 1.17 wide. Opisthosoma 1.89 long, 1.60 wide. Carapace blackish brown. Other characteristics as those of males. Eye sizes and interdistances: AME 0.06, ALE 0.09, PME 0.05, PLE 0.10, AME-AME 0.19, AME-ALE 0.17, PME-PME 0.29, PME-PLE 0.26, AME-PME 0.20, ALE-PLE 0.17. MOA 0.27 long, front width 0.31, back width 0.39. Sternum, chelicerae, labium, and maxillae blackish brown. Legs yellowish and spinous. Leg measurements: I 4.26 (1.32, 0.38, 0.99, 0.96, 0.61); II 4.20 (1.31, 0.41, 1.00, 0.91, 0.57); III 2.49 (0.58, 0.33, 0.68, 0.50, 0.40); IV 2.71 (0.65, 0.40, 0.68, 0.55, 0.43). Leg spination: I Fe: d1, p3; Pa: d1; Ti: d3, p2, r3, v1; Mt: p4, r4; II Fe: d2; Ti: d2, p2, r2, v1; Mt: p3, r3, v2; III Fe: d2; Pa: d1; Ti: d2, p2, r2; Mt: p2, r2, v1; IV: Fe: d1; Pa: d1; Ti: d1, p2, r1; Mt: p1, r1. Opisthosoma dorsum with symmetrical, longitudinal, reddish-brown stripes and lateral with scattered patches. Venter yellow in the middle and black at the sides.

Epigyne (Figs 15 , 16 ). Epigyne ca 1.7 × wider than long. Atrium large, sclerotized plate oval, copulatory openings originate medially; sclerotic fold well developed. Copulatory ducts thick, as wide as spermathecae; spermathecae suboval, 1.4 × wider than long, spaced by about 0.5 diameters of the vulva.

Distribution.

Known only from the type locality in Gansu Province, China (Fig. 17 ).

Figures

Figure 17. Records of the new species from the Xiaolong Mountains in Gansu Province, China.

Figures 9 - 12. Lysiteles longensis sp. nov. 9, 10 male habitus (9 dorsal view 10 ventral view) 11, 12 female habitus (11 dorsal view 12 ventral view). Scale bars: 1 mm.

Figures 13, 14. Lysiteles longensis sp. nov., left male palp (13 ventral view 14 retrolateral view). E = embolus; RTA = retrolateral tibial apophysis; T = tegulum; VTA = ventral tibial apophysis. Scale bar: 0.1 mm.

Figures 15, 16. Lysiteles longensis sp. nov., epigyne / vulva (15 ventral view 16 dorsal view). CD = copulatory duct; CO = copulatory opening; FD = fertilization duct; S = spermatheca. Scale bar: 0.1 mm.