Trilacuna aoxian Tong & Shao & Bian & Li 2024, sp. nov.
Creators: name: Tong, Yanfeng
name: Shao, Yongbo
name: Bian, Dongju
name: Li, Shuqiang
Publisher: name: Zenodo
Year: 2024
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Oonopidae
Trilacuna
Trilacuna aoxian

description: Trilacuna aoxian Tong & Li sp. nov.
Figs 5, 6, 7, 8
Type materials.
Holotype ♂ (SYNU - 989): China, Yunnan Prov., Menglun, XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 16–31 / 3 / 2007; Paratypes: 1 ♀ (SYNU - 990), XTBG, primary tropical seasonal rain forest, searching by hand, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 5–12 / 1 / 2007; 1 ♀ (SYNU - 991), XTBG, primary tropical seasonal rain forest, searching by hand, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 19–25 / 11 / 2006; 1 ♀ (SYNU - 992), XTBG, primary tropical seasonal rain forest, searching by hand, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 5–12 / 12 / 2006; 1 ♂ (SYNU - 993), XNNR, secondary tropical montane evergreen broad-leaved forest, pitfall traps, 21 ° 54.767 ' N, 101 ° 11.431 ' E, 880 m, Guo Zheng leg., 1–15 / 3 / 2007; 1 ♀ (SYNU - 994), XNNR, secondary tropical seasonal moist forest, pitfall traps, 21 ° 54.607 ' N, 101 ° 17.005 ' E, 633 m, Guo Zheng leg., 16–31 / 6 / 2007; 1 ♀ (SYNU - 995), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 1–15 / 4 / 2007; 4 ♂ (SYNU - 996 –999), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 1–15 / 1 / 2007; 3 ♂ (SYNU - 1000 –1002), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 16–31 / 2 / 2007; 1 ♂ (SYNU - 1003), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.445 ' N, 101 ° 12.997 ' E, 744 m, Guo Zheng leg., 16–31 / 2 / 2007; 1 ♀ (SYNU - 1004), XTBG, primary tropical seasonal rain forest, searching by hand, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 19–25 / 11 / 2006; 1 ♂ (SYNU - 1005), XNNR, secondary tropical seasonal moist forest, pitfall traps, 21 ° 54.607 ' N, 101 ° 17.005 ' E, 633 m, Guo Zheng leg., 1–15 / 3 / 2007; 2 ♂ 1 ♀ (SYNU - 1006 –1008), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 16–31 / 1 / 2007; 1 ♂ (SYNU - 1009), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 16–31 / 2 / 2007; 2 ♂ 1 ♀ (SYNU - 1010 –1012), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 1–15 / 1 / 2007; 1 ♂ (SYNU - 1013), XNNR, secondary tropical seasonal moist forest, searching by hand, 21 ° 54.607 ' N, 101 ° 17.005 ' E, 633 m, Guo Zheng leg., 19–25 / 2 / 2007; 3 ♂ (SYNU - 1014 –1016), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.445 ' N, 101 ° 12.997 ' E, 744 m, Guo Zheng leg., 16–31 / 2 / 2007; 3 ♂ (SYNU - 1017 –1019), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 1–15 / 2 / 2007; 1 ♂ (SYNU - 1023), XNNR, primary tropical seasonal rain forest, pitfall traps, 2 1 ° 57.445 ' N, 101 ° 12.997 ' E, 744 m, Guo Zheng leg., 16–31 / 2 / 2007; 1 ♀ (SYNU - 1024), XNNR, secondary tropical seasonal moist forest, pitfall traps, 21 ° 54.607 ' N, 101 ° 17.005 ' E, 633 m, Guo Zheng leg., 1–15 / 7 / 2007; 1 ♀ (SYNU - 1027), XNNR, primary tropical seasonal rain forest, searching by hand, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 19–25 / 10 / 2006; 1 ♂ (SYNU - 1028), XNNR, primary tropical seasonal rain forest, searching by hand, 2 1 ° 57.445 ' N, 101 ° 12.997 ' E, 744 m, Guo Zheng leg., 19–25 / 1 / 2007; 1 ♂ (SYNU - 1029), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 16–31 / 2 / 2007; 1 ♀ (SYNU - 1030), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 16–31 / 2 / 2007; 1 ♀ (SYNU - 1031), XNNR, primary tropical seasonal rain forest, searching by hand, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 19–25 / 2 / 2007; 1 ♂ (SYNU - 1032), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.669 N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 1–15 / 1 / 2007; 1 ♀ (SYNU - 1033), XNNR, primary tropical seasonal rain forest, searching by hand, 21 ° 57.445 ' N, 101 ° 12.997 ' E, 744 m, Guo Zheng leg., 10–20 / 6 / 2007; 3 ♂ (SYNU - 1034 –1036), XNNR, primary tropical seasonal rain forest, pitfall traps, 21 ° 57.669 ' N, 101 ° 11.893 ' E, 790 m, Guo Zheng leg., 16–31 / 2 / 2007; 2 ♂ 1 ♀ (SYNU - 1048 –1050), XTBG, primary tropical seasonal rain forest, pitfall traps, 21 ° 55.035 ' N, 101 ° 16.500 ' E, 558 m, Guo Zheng leg., 1–15 / 1 / 2007.
Diagnosis.
The new species is similar to Trilacuna changzi Tong & Li, 2020 in having long, thick setae on male endites, the tortuous, tube-like globular structure of endogyne, and the deep depressions on carapace, but it can be distinguished by the densely mucronate structure on sub-distal area of bulb (Fig. 8 F, H) vs without mucronate structure (Tong et al. 2020: figs 5 A, C, E), the rows of short, black thorn-like setae and cluster of short setae on epigastric region of male (Fig. 5 E) vs a cluster of dense, short setae behind epigastric region (Tong et al. 2020: arrow in fig. 4 C), and the triangular plate on epigastric region of female having the height / length = 0.33 (Fig. 6 G), vs the height / length = 0.45 in T. changzi (Tong et al. 2020: fig. 6 G).
Description.
Male (holotype). Body yellowish brown, chelicerae, sternum and legs lighter; habitus as in Fig. 5 A, C; body length 1.62. Carapace (Fig. 5 B, G): 0.77 long, 0.63 wide; sides smooth; lateral margin with small denticles; posterior surface with deep depressions and group of large hair bases. Eyes (Fig. 5 B, F): ALE largest; PLE and PME nearly equal in size; ALE – PLE separated by less than ALE radius; PME touching each other; posterior eye row recurved as viewed from above, procurved as viewed from front. Clypeus (Fig. 5 F): height about 0.75 times of ALE diameter, with a triangular, pointed, clypeus median projection (cmp). Mouthparts (Fig. 7 C): labium deeply incised, endites with two short, thick setae and two very long, thick setae. Sternum (Fig. 5 D): surface smooth. Abdomen (Fig. 5 A, C, E, H): 0.86 long, 0.66 wide; booklung covers ovoid, surface smooth; epigastric region strongly elevated, with two rows of short, black thorn-like setae and cluster of short setae. Palp (Figs 7 A, B, 8 A – I): orange; 0.57 long (0.15, 0.13, 0.11, 0.18); femur elongated (width / length = 0.64); bulb oval, with densely mucronate structure on sub-distal area; embolus system with many hair-like structure and a single slender posterior branch.
Female (SYNU - 990). Same as male except as noted. Body habitus as in Fig. 6 A, C, E; body length 1.81. Carapace (Fig. 6 B, F): 0.73 long, 0.65 wide. Abdomen (Fig. 6 A, C, E, G): 1.08 long, 0.82 wide. Epigaster (Figs 6 G, 7 D): with a triangular plate, the height / length = 0.33. Endogyne (Fig. 7 E): with narrow, transverse sclerite (tsc), an anterior stick-shaped sclerite (as), and a posterior tortuous, tube-like globular structure (glo); transverse bars (tba) with two lateral apodemes (ap).
Etymology.
The specific name comes from Chinese pinyin, “ aoxian ”, which means “ depression ” and is in reference to the deep depression on posterior surface of carapace; noun in apposition.
Distribution.
Known only from the type locality.
description: Published as part of Tong, Yanfeng, Shao, Yongbo, Bian, Dongju & Li, Shuqiang, 2024, Two new oonopid spiders (Arachnida, Araneae) from Xishuangbanna tropical rainforest, Yunnan, China, pp. 333-348 in ZooKeys 1205 on pages 333-348, DOI: 10.3897/zookeys.1205.124183