Brommella linyuchengi Li, 2017

Li, Shuqiang & Wang, Xiaoxiao, 2017, New cave-dwelling spiders of the family Dictynidae (Arachnida: Araneae) from Guangxi and Guizhou, China, Zoological Systematics 42 (2), pp. 125-228 : 153-158

publication ID	https://doi.org/ 10.11865/zs.201711
publication LSID	lsid:zoobank.org:pub:AB92E114-07FF-41A5-AF24-DF04F8232CA5
DOI	https://doi.org/10.5281/zenodo.5459561
persistent identifier	https://treatment.plazi.org/id/039E87CA-9774-FF98-FF73-7CE76B72F86E
treatment provided by	Diego
scientific name	Brommella linyuchengi Li
status	sp. nov.

Treatment

Brommella linyuchengi Li View in CoL , sp. nov. ( Figs 26–30 View Figure 26 View Figure 27 View Figure 28 View Figure 29 View Figure 30 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Nanning City , Wuming County, Chengdong Town , Xiahuang Village , Taiji Cave , 23°11.050´N, 108°19.818´E, elev. 111 m, 20 October 2010, X. Wang & L. Lin leg., deposited in IZCAS GoogleMaps . Paratypes. 10 males, 7 females, same data as holotype, deposited in IZCAS GoogleMaps .

Etymology. The specific name is a patronym in honor of Prof. Yucheng Li from Sichuan University in Chengdu; noun in apposition. Prof. Lin is a leading taxonomist in Mysmenidae .

Diagnosis. The new species is similar to B. punctosparsa (Song, Zhu & Chen, 1999: 363, figs 213K–N), but can be distinguished by the widely separated copulatory openings (close in B. punctosparsa ), the bent median apophysis (obtuse triangle-shaped in B. punctosparsa ), and the dorsal lobe of epigynum acuminate and straight (hooked in B. punctosparsa ).

Description. Male (holotype). Total body length 2.25 ( Fig. 30E View Figure 30 ). Prosoma length 1.00, width 1.03. Dorsal shield of prosoma yellow-brown. Cephalic region width 0.45, relatively flat, covered with several setae. Fovea reduced. Cervical groove indistinct. Six eyes, AME absent, all eyes white, encircled with black. Eye sizes and interdistances: ALE 0.08, PLE 0.09, PME 0.05; ALE-PLE 0.01, PLE-PME 0.02, PME-PME 0.06, ALE-ALE 0.05. Eye region length 0.14, width 0.27. Clypeus height 0.10. Chelicerae length 0.43, width 0.20. Chelicerae with distinct lateral condyles, 3 promarginal and 4 retromarginal teeth. Chelicerae yellow-brown. Labium and gnathocoxae yellow-brown, sternum yellow. Labium length 0.13, width 0.20. Gnathocoxae length 0.30, width 0.13. Sternum length 0.63, width 0.55. Legs yellow. Leg formula I-IV-II-III. Leg measurements: I 4.16 (1.20, 0.38, 1.10, 0.90, 0.58); II 3.50 (1.00, 0.35, 0.85, 0.80, 0.50); III 2.96 (0.85, 0.33, 0.65, 0.70, 0.43); IV 3.90 (1.15, 0.30, 1.00, 0.95, 0.50). Ratio Cl/Met IV = 0.34, with 5 setae. Opisthosoma length 1.25, width 0.85, pale yellow, without distinct pattern. Cribellum narrow, undivided.

Pedipalpus ( Figs 26–27 View Figure 26 View Figure 27 , 29 View Figure 29 ). Cymbium 0.38 long. Embolus long, filiform, originating at approximately 7-o’clock position. TA prolaterally short and simple, with a tiny, sharply pointed apophysis. Prolateral part of TA with an upward bending apophysis. RTA large, simple, pointed distally, with a single fold. Base of tibia with a big bifurcated spur.

Female (one of the paratypes). Total body length 2.00 ( Figs 30C–D View Figure 30 ). Prosoma length 0.82, width 0.63. Cephalic region width 0.45. Eye sizes and interdistances: ALE 0.06, PLE 0.07, PME 0.04; ALE-PLE 0.01, PLE-PME 0.03, PME-PME 0.05, ALE-ALE 0.05. Eye region length 0.14, width 0.25. Clypeus height 0.09. Chelicerae length 0.39, width 0.18. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Labium length 0.13, width 0.20. Gnathocoxae length 0.33, width 0.18. Sternum length 0.63, width 0.55. Leg formula I-IV-II-III. Leg measurements: I 2.72 (0.83, 0.28, 0.68, 0.55, 0.38); II 2.30 (0.70, 0.25, 0.50, 0.50, 0.35); III 2.09 (0.63, 0.25, 0.45, 0.45, 0.31); IV 2.69 (0.80, 0.28, 0.63, 0.63, 0.35). Ratio Cl/Met IV = 0.27, with 5 setae. Opisthosoma length 1.20, width 0.88.

Epigynum ( Figs 28 View Figure 28 , 30A–B View Figure 30 ). Width 0.22. BO strongly sclerotized, widely separated. Bursae reduced. Copulatory ducts twisted tightly. Spermathecae parts not enlarged, “S”-shaped.

Variation. Total body length: males 1.80–2.30 (n = 11), females 1.70–2.50 (n = 7).

Distribution. Known only from the type locality ( Fig. 97 View Figure 97 ).