Macrothele nanning Lin & Li, 2021

Lin, Yejie, Yan, Xunyou, Li, Shuqiang, Ballarin, Francesco & Chen, Haifeng, 2021, Five new species of Macrothele Ausserer, 1871 from China (Araneae, Macrothelidae), ZooKeys 1052, pp. 1-23 : 1

Macrothele nanning Lin & Li sp. nov.

Figures 11 , 12 , 13C , 14C , 16

Type material.

Holotype: 1♂ (IZCAS-Ar41869) China, Guangxi Zhuang Autonomous Region, Nanning, Suxu Town, Mu Village, Shibaluohan Cave, 22.5433°N, 108.0565°E, elevation ca 190 m, 09.V.2015, Zhigang Chen & Yunchun Li leg. Paratypes: 5♀ (IZCAS-Ar41870-Ar41874), same data as holotype.

Etymology.

The species epithet refers to the type locality; noun in apposition.

Diagnosis.

Males of Macrothele nanning sp. nov. resemble M. multispine by having blunt spines in lateral and dorsal views of palpal tibia and similar palpal bulb morphology, and females of the new species are similar to others by the apically globose receptacula bent inwards apically. Male of M. nanning sp. nov. can be distinguished from M. multispine by having the tibia with eight blunt spines in prolateral view and seven in dorsal view, the blunt spines extending onto patella (vs three blunt spines in prolateral view and one in dorsal view and blunt spines absent from patella). Females can be differentiated from M. multispine by the short, robust copulatory ducts and receptacula expanded basally (vs copulatory ducts long and narrow and receptacula base unexpanded).

Description.

Male (holotype) (Figs 11 , 12B, C , 13C , 14C ): total length 12.63, carapace 5.30 long, 5.26 wide; opisthosoma 7.31 long, 4.17 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 0.25, ALE 0.47, PME 0.26, PLE 0.28; AME-AME 0.14, ALE-AME 0.06, ALE-PLE 0.56, PLE-PME 0.04, PME-PME 0.44. Cheliceral promargin with 11 stout teeth, basomesally with 17 denticles. Labium brown, with ca 17 cuspules; sternum chestnut, with three pairs of sigillae. Legs dark brown. Leg measurements: I 16.61 (4.49 + 5.77 + 3.91 + 2.44), II 17.30 (4.99 + 5.64 + 4.23 + 2.44), III 16.48 (4.17 + 5.13 + 4.74 + 2.44), IV 20.64 (5.06 + 6.73 + 6.09 + 2.76). Leg formula: 4231. Abdomen dark brown, hairy. Spinnerets: PMS one segment, 1.02 long, 0.24 wide, PMS-PMS 0.99; PLS three segments. PLS 3.94 long (2.45, 2.20, 2.78).

Male palp (Figs 11 , 13C , 14C ). Maxillae with ca 43 cuspules. Palpal trochanter without lyral spines. Patella with three blunt spines; tibia with blunt spines, eight in prolateral view and seven in dorsal view. Bulb nearly globose; embolus slightly curved, needle shaped, and expanded at base.

Female (Fig. 12A, D, E ): total length 17.08, carapace 7.12 long, 6.09 wide; opisthosoma 9.81 long, 6.86 wide. Eye sizes and interdistances: AME 0.23, ALE 0.50, PME 0.22, PLE 0.41; AME-AME 0.20, ALE-AME 0.12, ALE-PLE 0.08, PME-PME 0.64, PLE-PME 0.04. Cheliceral promargin with 13 stout teeth, basomesally with 22 denticles. Endites brown, labium with ca 30 cuspules. Leg measurements: I 18.28 (6.09 + 6.41 + 3.65 + 2.13), II 15.57 (5.00 + 5.45 + 2.88 + 2.24), III 21.26 (4.81 +5.00 + 4.10 + 2.37), IV 20.51 (5.45 + 7.18 + 5.32 + 2.56). Leg formula: 4132. Abdomen dark brown, hairy. Spinnerets: PMS one segment, 1.76 long, 0.49 wide, PMS-PMS 1.72; PLS three segments. PLS 7.81 long (2.36, 2.38, 3.06).

Female genitalia (Fig. 12A ) simple. Receptacula apically oval; copulatory ducts short and robust, expanded; the ratio of the length of the receptacula apically to the length of the copulatory duct is almost 1:4.

Variation.

Female total length 12.43-17.08 (n = 5).

Distribution.

China (Guangxi).

Figures

Figure 11. Macrothele nanning sp. nov., left palp, holotype A prolateral view B retrolateral view.

Figure 12. Macrothele nanning sp. nov., female genitalia, male holotype, and female paratypes A female genitalia, ventral view B male habitus, dorsal view C male habitus, ventral view D female habitus, dorsal view E female habitus, ventral view. Abbreviations: CD copulatory ducts, T terminus of receptacula.

Figure 13. Prolateral view of embolic tips of six species of Macrothele A M. emei sp. nov. B M. limenghuai sp. nov. C M. nanning sp. nov. D M. gigas E M. hungae sp. nov. F M. hanfeii sp. nov.

Figure 14. Retrolateral view of embolic tips of six species of Macrothele A M. emei sp. nov. B M. limenghuai sp. nov. C M. nanning sp. nov. D M. gigas E M. hungae sp. nov. F M. hanfeii sp. nov.

Figure 16. Distribution records of Macrothele species in East Asia 1 M. yani 2 M. arcuata 3 M. jingzhao 4 M. yunlingensis 5 M. undata 6 M. cangshanensis 7 M. yongshengensis 8 M. jinlin 9 M. bannaensis 10 M. yunnanica 11 M. menglunensis 12 M. multispine 13 M. limenghuai sp. nov. 14 M. emei sp. nov. 15 M. sanheensis 16 M. decemnotata 17 M. proserpina 18 M. monocirculata 19 M. raveni 20 M. guizhouensis 21 M. digitata 22 M. nanning sp. nov. 23 M. hanfeii sp. nov. 24 M. hunanica 25 M. hungae sp. nov. 26 M. holsti 27 M. palpator 28 M. taiwanensis 29 M. simplicata 30 M. yaginumai 31 M. gigas.