Brommella dolabrata 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 : 135-139

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-9762-FFB7-FF73-7A206B72FB83
treatment provided by	Diego
scientific name	Brommella dolabrata Li
status	sp. nov.

Treatment

Brommella dolabrata Li View in CoL , sp. nov. ( Figs 11–15 View Figure 11 View Figure 12 View Figure 13 View Figure 14 View Figure 15 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Yulin City , Luchuan County, Longzhu Scenic Spot , Longzhu Cave , 22°34.529´N, 110°13.932´E, elev. 94 m, 13 August 2009, C. Wang & Z. Yao leg., deposited in IZCAS GoogleMaps . Paratypes. 4 males, 13 females, same data as holotype, deposited in IZCAS GoogleMaps .

Etymology. The specific name is derived from the Latin word “ dolabratus ”, meaning “shaped like an ax”, and refers to the spur at the base of the male palpal tibia with a broad edge; adjective.

Diagnosis. The male of this new species closely resembles those of B. spirula Li , sp. nov. ( Figs 40–44 View Figure 40 View Figure 41 View Figure 42 View Figure 43 View Figure 44 ), but can be distinguished by the relatively straight apophysis (hooked in B. spirula Li , sp. nov.), the spur with broad tip (hooked and with a pointed end in B. spirula Li , sp. nov.). Females of this new species appear almost identical with B. chongzuoensis Li , sp. nov. ( Figs 9–10 View Figure 9 View Figure 10 ), but can be distinguished by the concave sclerotized rims of bursae towards the centre of epigynum (convex relative to centre of epigynum in B. chongzuoensis Li , sp. nov.), the thick and relatively straight copulatory duct joining the spermathecae (slender and coiled copulatory duct joining the spermathecae in B. chongzuoensis Li , sp. nov.), and the reniform spermathecae (ovate in B. chongzuoensis Li , sp. nov.).

Description. Male (holotype). Total body length 2.24 ( Fig. 15E View Figure 15 ). Prosoma length 1.10, width 0.95. Cephalic region width 0.43. Cephalic part flat, yellow, covered with several setae. Thoracic part light brown, fovea reduced. Eight eyes, PER procurved as seen from in front, AME smallest. All eyes dark, encircled with black. Eye diameters: AME 0.03, ALE 0.07, PLE 0.09, PME 0.07. Eye region length 0.19, width 0.38. Eye interdistances: AME-AME 0.01, AME-ALE 0.01, ALE-PLE 0.02, PLE-PME 0.05, PME-PME 0.07, AME-PME 0.08. Clypeus height 0.12. Chelicerae length 0.43, width 0.20. Chelicerae with distinct lateral condyles, 3 (2 large 1 small) promarginal and 4 retromarginal teeth. Chelicerae, labium and gnathocoxae brown, sternum light brown. Labium length 0.16, width 0.24. Gnathocoxae length 0.38, width 0.23. Sternum length 0.75, width 0.52. Legs light brown. Leg formula I-IV-II-III. Leg measurements: I 6.31 (1.76, 0.45, 1.70, 1.50, 0.90); II 5.14 (1.45, 0.43, 1.28, 1.23, 0.75); III 4.61 (1.30, 0.38, 1.10, 1.15, 0.68); IV 5.80 (1.60, 0.35, 1.40, 1.60, 0.85). Ratio Cl/Met IV = 0.18, with 5 setae. Opisthosoma length 1.25, width 0.98. Opisthosoma pale-yellow, without distinct pattern. Spinnerets yellowbrown.

Pedipalpus ( Figs 11–12 View Figure 11 View Figure 12 , 14 View Figure 14 ). Cymbium 0.75 long. Embolus slender, ribbon shaped, originated at approximately 6- o’clock position. TA tip boat head shaped. Dorsal of TA tip with large, relatively straight apophysis. TA retrolateral large, with a single fold, and with 4 setae. Spur with broad tip.

Female (one of the paratypes). Total body length 3.10 ( Figs 15C–D View Figure 15 ). Prosoma length 1.31, width 0.93. Cephalic region width 0.58. Eye sizes and interdistances: AME 0.04, ALE 0.08, PLE 0.09, PME 0.07; AME-AME 0.01, AME-ALE 0.01, ALE-PLE 0.03, PLE-PME 0.05, PME-PME 0.07, AME-PME 0.08. Eye region length 0.20, width 0.38. Clypeus height 0.12. Chelicerae length 0.53, width 0.25. Chelicerae with distinct lateral condyles, 3 promarginal and 4 retromarginal teeth. Labium length 0.20, width 0.26. Gnathocoxae length 0.44, width 0.24. Sternum length 0.75, width 0.69. Leg formula I-IV- II-III. Leg measurements: I 6.48 (1.80, 0.48, 1.80, 1.55, 0.85); II 4.88 (1.40, 0.45, 1.23, 1.15, 0.65); III 4.52 (1.25, 0.40, 1.38, 0.87, 0.62); IV 5.46 (1.49, 0.40, 1.40, 1.40, 0.77). Ratio Cl/Met IV = 0.25, with 11 setae. Opisthosoma length 1.70, width 1.40. Opisthosoma white, without distinct pattern.

Epigynum ( Figs 13 View Figure 13 , 15A–B View Figure 15 ). Width 0.51. Bursae large, located posteriorly, their sclerotized rims concave relative to centre of epigynum. Bursa developed. Slender copulatory ducts loosely coiled along the thick and relatively straight copulatory, the thick copulatory duct joining the reniform spermathecae. Fertilization duct internally attached at base of spermathecae.

Variation. Total body length: males 2.10–3.10 (n = 5), females 2.51–3.50 (n = 13).

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