Brommella yizhouensis 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 : 185-190

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-9754-FFF8-FF73-7CC26B72FBC6
treatment provided by	Diego
scientific name	Brommella yizhouensis Li
status	sp. nov.

Treatment

Brommella yizhouensis Li View in CoL , sp. nov. ( Figs 57–61 View Figure 57 View Figure 58 View Figure 59 View Figure 60 View Figure 61 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Yizhou City, Huixianshan Mountain Scenic Spot , Bailong Cave ,

24º30.322'N, 108º39.888'E, elev. 221 m, 27 July 2009, C. Wang & Z. Yao leg., deposited in IZCAS. Paratypes. 17 females GoogleMaps ,

same data as holotype, deposited in IZCAS.

Etymology. The specific name refers to the type locality; adjective.

Diagnosis. This new species is similar to B. punctosparsa (Song, Zhu & Zhang, 1999: 363, figs 213K–N), but can be distinguished by the details of its pedipalpus and epigynum.

Description. Male (holotype). Total body length 2.10 ( Fig. 61E View Figure 61 ). Prosoma length 0.95, width 0.75. Cephalic region width 0.43. Cephalic part relatively flat, white, covered with several setae. Thoracic part white, fovea reduced, Prosoma margin indistinct. Six eyes, AME absent, all eyes white, encircled with black. Eye diameters: ALE 0.06, PLE 0.06, PME 0.03. Eye region length 0.13, width 0.29. Eye interdistances: ALE-PLE 0.01, PLE-PME 0.04, PME-PME 0.08, ALE-ALE 0.10. Clypeus height 0.12. Chelicerae length 0.39, width 0.19. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Chelicerae, labium and gnathocoxae yellow; sternum white. Labium length 0.11, width 0.20. Gnathocoxae length 0.33, width 0.18. Sternum length 0.46, width 0.50. Legs white. Leg formula I-IV-II-III. Leg measurements: I 4.56 (1.25, 0.38, 1.25, 1.00, 0.68); II 3.98 (1.10, 0.33, 1.00, 0.90, 0.65); III 3.43 (1.05, 0.33, 0.70, 0.80, 0.55); IV 4.29 (1.20, 0.38, 0.98, 1.08, 0.65). Ratio Cl/Met IV = 0.23, with 5 setae. Opisthosoma length 1.18, width 0.95. Opisthosoma white, without distinct pattern. Cribellum narrow, undivided.

Pedipalpus ( Figs 57–58 View Figure 57 View Figure 58 , 60 View Figure 60 ). Cymbium 0.39 wide. Embolus long, filiform, originating at approximately 9-o’clock position. TA prolaterally short and simple. Prolateral part of TA with a short finger-shaped projection. RTA large, simple, with a single fold, apical end of RTA pointed. Base of tibia with a large bifurcated spur, superior branch with forked apex.

Female (one of the paratypes). Total body length 2.43 ( Figs 61C–D View Figure 61 ). Prosoma length 1.00, width 0.73. Cephalic region width 0.45. Eye diameters: ALE 0.06, PLE 0.07, PME 0.05. Eye interdistances: ALE-PLE 0.01, PLE-PME 0.03, PME-PME 0.07, ALE-ALE 0.10. Eye region length 0.14, width 0.29. Clypeus height 0.11. Chelicerae length 0.40, width 0.20. Chelicerae with distinct lateral condyles, 3 promarginal and 6 retromarginal teeth. Labium length 0.13, width 0.20. Gnathocoxae length 0.34, width 0.18. Sternum length 0.65, width 0.53. Leg formula I-IV-II-III. Leg measurements: I 4.28 (1.25, 0.43, 1.10, 0.90, 0.60); II 3.53 (1.00, 0.40, 0.83, 0.75, 0.55); III 3.20 (0.90, 0.35, 0.70, 0.75, 0.50); IV 4.23 (1.25, 0.38, 1.00, 1.00, 0.60). Ratio Cl/Met IV = 0.25, with 12 setae. Opisthosoma length 1.40, width 1.10. Opisthosoma beige, without distinct pattern.

Epigynum ( Figs 59 View Figure 59 , 61A–B View Figure 61 ). Width 0.22. Lune shaped copulatory ducts can be seen in ventral view. Bursae reduced. Copulatory ducts relatively short and thick. Part of spermathecae slightly swollen, “7”-shaped ( Figs 59A View Figure 59 , 61B View Figure 61 ).

Variation. Total body length: females: 2.5–3.2 (n = 17).

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