Tricholathys burangensis sp. nov. (普兰毛隐蛛)

Wang, Lu-Yu, Peng, Xian-Jin & Zhang, Zhi-Sheng, 2023, The first record of Tricholathys Chamberlin & Ivie, 1935 (Araneae, Dictynidae) from China, with a new combination and descriptions of seven new species, ZooKeys 1185, pp. 255-267 : 255

publication ID	https://dx.doi.org/10.3897/zookeys.1185.107005
publication LSID	lsid:zoobank.org:pub:568A472D-950D-4338-A7DF-56C6EE473761
persistent identifier	https://treatment.plazi.org/id/9B0DB687-465A-58C9-95C6-E322429B7D7E
treatment provided by	ZooKeys by Pensoft
scientific name	Tricholathys burangensis sp. nov. (普兰毛隐蛛)
status

Treatment

Tricholathys burangensis sp. nov. (普兰毛隐蛛) View in CoL

Figs 2 View Figure 2 , 3 View Figure 3 , 16 View Figure 16

Type materials.

Holotype male: China, Tibet, Burang County, Burang Town, Kejia Village, 30°11′17.48′′N, 81°16′21.66′′E, elev. 3685 m; 24 July 2020, L.Y. Wang et al. leg. (SWUC-T-DI-07-01). Paratypes: 2 males and 13 females (SWUC-T-DI-07-02~16), with same data as holotype.

Etymology.

The specific name is derived from the county where the type locality is located; it is used as a noun in apposition.

Diagnosis.

The male of this new species is similar to T. subnivalis (Ovtchinnikov, 1989) ( Marusik et al. 2017: 256, fig. 4D-F) in having the embolus originating at about 7:30 o’clock, the anterior arm of the conductor gradually tapering and terminating at about 9 o’clock, the posterior arm of the conductor wide and spiral; the new species differs from T. subnivalis in having the posterior arm of the conductor with a pointed end (hook-shaped in T. subnivalis ) and retrolateral tibial apophysis crooked (straight in T. subnivalis ) (Figs 2A, B View Figure 2 , 3C-E View Figure 3 ). The female of the new species is similar to that of T. ovtchinnikovi Marusik, Omelko & Ponomarev, 2017 ( Marusik et al. 2017: 258, fig. 6J-L) in having the copulatory ducts semicircular, spermathecae globular, and fertilization ducts thin and hook-shaped, but the new species differs from T. ovtchinnikovi in having the copulatory ducts widely spaced and the strongly sclerotized part is five times longer than the length of weakly sclerotized part (vs 2.5 times longer in T. ovtchinnikovi ).

Description.

Male (holotype). Habitus as in Fig. 3A View Figure 3 . Total length 4.24 (4.39-4.46 in male paratypes). Prosoma 2.08 long, 1.61 wide; opisthosoma 2.36 long, 1.42 wide. Eye sizes and interdistances: AME 0.07, ALE 0.09, PME 0.07, PLE 0.09; AME-AME 0.06, AME-ALE 0.06, PME-PME 0.11, PME-PLE 0.11, ALE-PLE 0.05. MOA 0.23 long, anterior width 0.21, posterior width 0.26. Clypeus height 0.11. Chelicerae with 4 promarginal and 3 retromarginal teeth. Leg measurements: I 4.89 (1.48, 1.71, 0.98, 0.72); II 4.18 (1.22, 1.45, 0.85, 0.66); III 3.50 (1.03, 1.17, 0.73, 0.57); IV 5.20 (1.51, 1.78, 1.19, 0.72). Leg formula: 4123.

Palp (Figs 2A, B View Figure 2 , 3C-E View Figure 3 ). Tibia with broad and truncate retrolateral apophysis, S-shaped, its width slightly less than the length of tibia. Tip of cymbium with 4 spines. Anterior arm of conductor (AA) tapering gradually and terminating at about 9:00 o’clock position; posterior arm (PA) terminating in spiral with sharply pointed tip, subterminal part with distinct extension. Embolus originating at about 7:30 o’clock position.

Female paratype. Habitus as in Fig. 3B View Figure 3 . Total length 4.54 (4.54-5.05 in other female paratypes). Carapace 2.19 long, 1.68 wide; opisthosoma 2.72 long, 1.76 wide. Eye sizes and interdistances: AME 0.08, ALE 0.10, PME 0.08, PLE, 0.11; AME-AME 0.08, AME-ALE 0.07, PME-PME 0.12, PME-PLE 0.13, ALE-PLE 0.04. MOA 0.25 long, anterior width 0.26, posterior width 0.29. Clypeus 0.15 high. Leg measurements: I 4.64 (1.33, 1.63, 1.02, 0.66); II 3.90 (1.11, 1.29, 0.87, 0.63); III 3.68 (1.11, 1.16, 0.84, 0.57); IV 4.95 (1.45, 1.66, 1.14, 0.70). Leg formula: 4123.

Epigyne (Figs 2C, D View Figure 2 , 3F, G View Figure 3 ). Copulatory openings spiraled and somewhat 6-shaped (right one), spaced by about 3 times of its width. Weakly sclerotized part of copulatory ducts connected to the copulatory openings (trumpet-shaped) and strongly sclerotized part forming semicircular. Space between copulatory ducts wider than space between spermathecae. Spermathecae small, almost comma-shaped, length/width 3/2 and spaced by twice its diameter. Fertilization ducts thin, hook-shaped.

Distribution.

Known only from the type locality, Tibet, China (Fig. 16 View Figure 16 ).