Brommella baiseensis 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 : 126-133

publication ID	https://doi.org/ 10.11865/zs.201711
publication LSID	lsid:zoobank.org:pub:AB92E114-07FF-41A5-AF24-DF04F8232CA5
persistent identifier	https://treatment.plazi.org/id/039E87CA-9769-FFB1-FF73-7AE76B72F82B
treatment provided by	Diego
scientific name	Brommella baiseensis Li
status	sp. nov.

Treatment

Brommella baiseensis Li View in CoL , sp. nov. ( Figs 2–6 View Figure 2 View Figure 3 View Figure 4 View Figure 5 View Figure 6 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Baise City , Pingguo County, Jiucheng Town , Xingning Village , Bafengshan Mountain , Guandimiao Cave , 23º34.022'N, 107º40.763'E, elev. 287 m, 17 October 2010, X. Wang & L. Lin leg., deposited in IZCAS GoogleMaps . Paratypes. 3 males, 9 females, same data as holotype, deposited in IZCAS GoogleMaps .

Etymology. The specific name is derived from the type locality; adjective.

Diagnosis. This new species is similar to B. josephkohi Li , sp. nov. ( Figs 21–25 View Figure 21 View Figure 22 View Figure 23 View Figure 24 View Figure 25 ), but can be distinguished by the deep notch on the prolateral surface of subtegulum (smooth in B. josephkohi Li , sp. nov.), the presence of a branched apophysis towards base of TA (with a simple bump in B. josephkohi Li , sp. nov.), TA prolaterally slightly sclerotized (strongly sclerotized and slightly triangular in B. josephkohi Li , sp. nov.), the straight, not hooked tibial spur (hooked in B. josephkohi Li , sp. nov.), and BO exposed (BO covered in B. josephkohi Li , sp. nov.).

Description. Male (holotype). Total body length 2.65 ( Fig. 6E View Figure 6 ). Prosoma length 1.20, width 1.00. Cephalic region width 0.50. Carapace pyriform, cephalic part flat, pale, covered with several setae. Thoracic part pale, fovea reduced, prosoma margin in posterior part with black margin. Six eyes, AME absent, all eyes silver, encircled with black. Eye sizes and interdistances: ALE 0.08, PLE 0.09, PME 0.06; ALE–PLE 0.01, PLE–PME 0.05, PME–PME 0.06, ALE–ALE 0.08. Eye region length 0.17, width 0.35. Clypeus height 0.18. Chelicerae length 0.55, width 0.23. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Chelicerae, labium and gnathocoxae light brown; sternum yellow. Labium length 0.15, width 0.20. Gnathocoxae length 0.35, width 0.25. Sternum length 0.70, width 0.68. Leg formula I-IV- II-III. Leg measurements: I 6.10 (1.75, 0.40, 1.65, 1.45, 0.85); II 4.60 (1.35, 0.40, 1.15, 1.05, 0.65); III 4.40 (1.20, 0.40, 0.90, 1.15, 0.75); IV 5.50 (1.55, 0.40, 1.35, 1.45, 0.75). Opisthosoma length 1.30, width 1.05. Opisthosoma pale, without any distinct pattern. Cribellum narrow, undivided.

Pedipalpus ( Figs 2–3 View Figure 2 View Figure 3 , 5 View Figure 5 ). Cymbium 0.77 long. Apex of cymbium narrowed distally, ratio of cymbium length/width = 2.54. Surface of subtegulum wrinkled, black gray, prolaterally with a deep notch. Embolus filiform, originating at approximately 8:30 from tegulum. TA very strongly, spiraled, TA prolaterally broad, with slightly sclerotized edge. Base of tibia with a papillary spur, with several setae on it.

Female (one of the paratypes). Total body length 2.70 ( Figs 6C–D View Figure 6 ). Prosoma length 1.40; width 0.85. Cephalic region width 0.50. Cephalic part slightly elevated. Eye diameters: ALE 0.08, PLE 0.09, PME 0.07. Eye region length 0.16, width 0.34. Eye interdistances: ALE–PLE 0.01, PLE–PME 0.04, PME–PME 0.07, ALE–ALE 0.09. Clypeus height 0.12. Chelicerae length 0.48, width 0.24. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Labium length 0.14, width 0.24. Gnathocoxae length 0.34, width 0.20. Sternum length 0.70, width 0.64. Leg formula I-IV- II-III. Leg measurements: I 5.50 (1.60, 0.45, 1.45, 1.30, 0.70); II 4.25 (1.30, 0.40, 0.95, 1.00, 0.60); III 3.85 (1.15, 0.35, 0.85, 0.95, 0.55); IV 4.78 (1.40, 0.40, 1.13, 1.20, 0.65). Ratio Cl/Met IV = 0.14, with 11 setae. Opisthosoma length 1.35, width 0.95.

Epigynum ( Figs 4 View Figure 4 , 6A–B View Figure 6 ) 0.32 wide. BO round, relatively large. Copulatory ducts coiled in circular windings (ventral view). Bursae slightly enlarged, not fused. Copulatory ducts extremely long and exceedingly convoluted ( Fig. 4A View Figure 4 ). Spermathecae small, transversely swollen.

Variation. Total body length: males 2.65–3.00 (n = 4), females 2.30–2.80 (n = 9).

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