Latouchia yejiei Zhang & Wang, 2021

Zhang, Shu-Yuan & Wang, Cheng-Bin, 2021, Two new species of the genus Latouchia Pocock, 1901 from southeast China (Araneae: Mygalomorphae: Halonoproctidae), Biodiversity Data Journal 9, pp. 72456-72456 : 72456

Latouchia yejiei Zhang & Wang, 2021 sp. n.

Materials

Type status: Holotype. Occurrence: recordedBy: Lin-Jie Gong ; individualCount: 1; sex: male; Location : country: CHINA; stateProvince: Hainan; verbatimLocality: Ledong Li Autonomous County, Jianfengling National Nature Reserve , Road of Tianchi to Mingfenggu ; verbatimElevation: 818 m; verbatimLatitude: 27.7406°N; verbatimLongitude: 117.6460°E; Event: year: 2018; month: 11; day: 23; Record Level: institutionCode: MYNU Type status: Paratype. Occurrence: recordedBy: Shu-Yuan Zhang; Zhe-Wen Ding; sex: 1 female; Location: country: CHINA; stateProvince: Hainan; verbatimLocality: Ledong Li Autonomous County, Jianfengling National Nature Reserve , Road of Tianchi to Mingfenggu ; Event : year: 2020; month: 6; day: 30; Record Level : institutionCode: MYNU

Description

Male (Fig. 5 A, B). Holotype (Ar.-MYNU-HNLD0001). Total length 17.24 (not including chelicerae), chelicerae 4.58 long. Carapace 8.84 long and 8.25 wide, reddish-black in ethanol; rim of carapace black and with a slight ridge; fovea U-shaped, without any modification posteriorly; caput slightly raised, with numerous transverse grooves between ocular tubercle and fovea. Eyes in two rows, anterior row procurved; eye sizes and interdistances: AME 0.31, ALE 0.46, PME 0.32, PLE 0.47, AME-AME 0.20, ALE-ALE 0.76, AME-ALE 0.14, PME-PME 0.61, PME-PLE 0.07, ALE-PLE 0.27. Chelicerae reddish-black, rastellum formed by 10-12 stout spines on tubercle. Labium 1.29 long and 1.94 wide, without cuspules. Maxillae 3.32 long and 2.01 wide, without cuspules. Sternum 5.24 long and 4.71 wide, reddish-brown, with large sigilla centrally. Opisthosoma 8.41 long and 5.27 wide, dorsally yellowish-grey, without obvious pattern. Leg measurements: leg I 28.34 (8.17, 3.40, 7.28, 6.27, 3.22), leg II 26.19 (7.38, 3.26, 6.57, 5.94, 3.04), leg III 21.46 (4.64, 2.73, 4.24, 6.09, 3.76), leg IV 33.05 (8.47, 3.92, 7.99, 7.91, 4.76). Scopulae present on tarsi I-II and distal metatarsi I-II. Spines on anterior legs straight, some of them slightly hooked.

Palp (Fig. 6 A-D). Tibia relatively slender, with numerous bristles ventrally; without spines. Embolus not obviously curved, with a median triangular apophysis proventrally.

Female (Fig. 5 C-E). Paratype (Ar.-MYNU-HNLD0002). Total length 34.02 (not including chelicerae), chelicerae 5.03 long. Carapace 14.83 long and 12.90 wide, reddish-brown in ethanol (slightly darker when alive); fovea U-shaped; caput obviously raised. Eyes in two rows on tubercle, anterior row slightly procurved. Eye sizes and interdistances: AME 0.43, ALE 0.52, PME 0.46, PLE 0.48, AME-AME 0.27, ALE-ALE 0.41, AME-ALE 0.12, PME-PME 1.13, PME-PLE 0.09, ALE-PLE 0.41. Chelicerae robust; rastellum formed by ca. 15 stout spines on tubercle. Labium 2.73 long and 2.87 wide, with 7 cuspules. Sternum 8.22 long and 8.23 wide, reddish-brown, with large sigilla centrally. Opisthosoma 19.17 long and 13.31 wide, pattern as in male. Leg measurements: leg I 29.16 (10.20, 5.53, 6.89, 4.30, 2.24), leg II 24.40 (8.70, 4.19, 4.93, 4.58, 2.00), leg III 21.81 (7.64, 3.81, 3.79, 3.95, 2.62), leg IV 33.49 (10.30, 6.00, 6.52, 6.88, 3.79). Femora I-IV and patellae I-II without spines; most spines of anterior legs hooked.

Vulva (Fig. 7 ). Spermathecae outward-tilted, not bulbous, with numerous glandular pores; stalks almost 1.5 times as wide as spermathecae.

Diagnosis

The female of Latouchia yejiei sp. n. resembles L. bachmaensis Ono, 2010, but it can be distinguished by the spermathecae being not bulbous; the stalks being broad, almost 1.5 times as wide as the spermathecae (vs. spermathecae slightly bulbous and stalks almost equal to spermathecae in L. bachmaensis ). The male of the new species can be distinguished from other known male congeners by a triangular apophysis present on embolus proventrally (Fig. 6 D) (It is not a triangular apophysis in Latouchia formosensis smithi Tso, Haupt & Zhu, 2003, only a ridge proventrally).

Etymology

The specific name is given in honour of Mr. Ye-Jie Lin, who gave great help to this study. This noun is in genitive case and masculine singular.

Distribution

China (Hainan).

Field observations

Habitat, living female and burrow as shown in Fig. 8 .

Figures

Figure 5. Habitus of Latouchia yejiei sp. n. A male holotype, dorsal view; B male holotype, ventral view; C female paratype, dorsal view; D female paratype, ventral view; E female paratype, lateral view.

Figure 6. Left male palp of Latouchia yejiei sp. n., holotype. A retrolateral view; B ventral view; C prolateral view; D tip of embolus.

Figure 7. Vulva of Latouchia yejiei sp. n., paratype, dorsal view.

Figure 8. Field observations of Latouchia yejiei sp. n. at Jianfengling National Nature Reserve A habitat; B living female; C entrance of burrow, closed with trap door (indicated by arrow).