Macrothele limenghuai Lin & Li sp. nov.

Figures 9, 10, 13B, 14B, 15A, E, 16

Type material.

Holotype: 1♂ (IZCAS-Ar41866) China, Sichuan Province, Ya’an, Yucheng District, Sichuan Agriculture University, Laoban Mountain region, 29.9757°N, 102.9932°E, 17.VI.2014, Yejie Lin leg. Paratypes: 1♂ (IZCAS-Ar41867), same data as holotype; 1♀ (IZCAS-Ar41868), same data as holotype but 22.X.2020, Menghua Li leg.

Etymology.

The species epithet is for Mr Menghua Li who collected the paratype; noun (name) in genitive case.

Diagnosis.

Males of Macrothele limenghuai sp. nov. resemble those of M. monocirculata Xu & Yin, 2000 and M. raveni Zhu, Li & Song, 2000 by having similar palpal bulb morphology, but they can be distinguished by having five tibial spines visible in prolateral view, the embolus as long as the tibia, and the base of the embolus with a depression (vs tibia with four spines in M. monocirculata or three spines in M. raveni visible in prolateral view, embolus notably longer than tibia and without basal depression). Females of Macrothele limenghuai sp. nov. resemble those of M. monocirculata and M. raveni by the receptacula coiling almost 360°, but they can be differentiated by the copulatory ducts bending outward medially (120°) (vs copulatory ducts straight in M. monocirculata and bent 90° in M. raveni).

Description.

Male (holotype) (Figs 9, 10B, C, 13B, 14B, 15A, E): total length 28.13, carapace 13.86 long, 12.43 wide; opisthosoma 15.19 long, 9.52 wide. Carapace dark brown, covered with short setae, middle of cephalic region with row of setae. Fovea deep, round. AER slightly procurved, PER recurved. Eye sizes and interdistances: AME 0.43, ALE 0.65, PME 0.42, PLE 0.51; AME-AME 0.31, ALE-AME 0.13, ALE-PLE 0.16, PLE-PME 0.11, PME-PME 0.89. Chelicerae black, promargin with 11 stout teeth, basomesally with 27 denticles. Labium brown, with ca 104 cuspules; sternum chestnut, with three pairs of sigillae. Legs dark brown. Leg measurements: I 44.26 (12.31 + 13.63 + 11.10 + 7.22), II 46.30 (11.81 + 16.23 + 11.11 + 7.15), III 41.66 (11.10 + 12.74 + 11.60 + 6.22), IV 53.85 (13.62 + 17.83 + 14.29 + 8.11). Leg formula: 4213. Abdomen dark brown, hairy. Spinnerets: PMS one segment, 1.44 long, 0.56 wide, PMS-PMS 2.35; PLS three segments. PLS 12.18 long (4.08, 4.16, 4.10).

Male palp (Figs 9, 13B, 14B). Maxillae with ca 172 cuspules. Palpal trochanter with 20 lyral spines. Tibia with five spines. Bulb nearly globose; embolus needle shaped; embolus base with depression.

Female (Fig. 10A, D, E): total length 39.30, carapace 15.14 long, 27.31 wide; opisthosoma 24.11 long, 14.26 wide. Eye sizes and interdistances: AME 0.44, ALE 0.77, PME 0.47, PLE 0.59; AME-AME 0.36, ALE-AME 0.14, ALE-PLE 0.15, PLE-PME 0.08. Cheliceral promargin with 11 stout teeth, basomesally with 28 denticles. Endites brown, labium with ca 127 cuspules. Palpal trochanter with lyral spines. Leg measurements: I 46.07 (13.01 + 17.03 + 11.02 + 5.02), II 47.24 (12.08 + 18.10 + 11.01 + 6.05), III 45.32 (11.07 + 15.08 + 12.05 + 6.12), IV 54.32 (14.10 + 19.02 + 14.09 + 7.11). Leg formula: 4213 Abdomen dark brown, hairy. Spinnerets: PMS one segment, 1.44 long, 0.53 wide, PMS-PMS 1.61; PLS three segments. PLS 13.63 long (2.40, 4.63, 4.48).

Female genitalia (Fig. 10A) simple. Receptacula apically expanded; copulatory ducts narrow, C-shaped, coiled anteriorly from 180° to 300°.

Variation.

Male total length 28.13-32.62 (n = 2).

Distribution.

China (Sichuan).