Brommella xinganensis Li 2017, sp. nov.
Creators: name: Li, Shuqiang
name: Wang, Xiaoxiao
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Dictynidae
Brommella
Brommella xinganensis

description: <i>Brommella xinganensis</i> Li, sp. nov. (Figs 52–56, 97) Type material. Holotype. Male, China, Guangxi, Guilin City, Xing'an County, Rudongyan Village, Rudongyan Cave, 25º34.437'N, 110º37.237'E, elev. 225 m, 9 October 2010, X. Wang &amp; L. Lin leg., deposited in IZCAS. Paratypes. 1 male, 12 females, same data as holotype, deposited in IZCAS. Etymology. The specific name refers to the type locality; adjective. Diagnosis. This new species is similar to <i>B. punctosparsa</i> (Song, Zhu &amp; Chen, 1999: 363, figs 213K–N), but can be distinguished by the 8-o’clock position of the embolus base (embolus originating at 5-o’clock position in <i>B. punctosparsa</i>), the conical medial apophysis (obtuse triangle in <i>B. punctosparsa</i>), and the relatively jumbled copulatory ducts in ventral view (copulatory ducts in coils in <i>B. punctosparsa</i>). Description. Male (holotype). Total body length 1.80 (Fig. 56E). Prosoma length 0.85, width 0.68. Cephalic region width 0.43. Cephalic part relatively flat, yellow, darker than thoracic part, covered with several setae. Prosoma margin black, with several radical stripes on the cephalothorax, fovea reduced. Six eyes, AME reduced to small pigment spots, all eyes white, encircled with black. PER straight. Eye diameters: ALE 0.07, PLE 0.08, PME 0.06. Eye interdistances: ALE-PLE 0.02, PLE-PME 0.04, PME-PME 0.06, ALE-ALE 0.08. Eye region length 0.15, width 0.31. Clypeus height 0.09. Chelicerae length 0.28, width 0.19. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Chelicerae light brown, labium and gnathocoxae light brown; sternum yellow. Labium length 0.10, width 0.18. Gnathocoxae length 0.28, width 0.16. Sternum length 0.53, width 0.48. Legs yellow. Leg formula I-IV-II-III. Leg measurements: I 3.78 (1.10, 0.35, 1.00, 0.80, 0.53); II 3.18 (0.90, 0.33, 0.75, 0.70, 0.50); III 2.84 (0.83, 0.28, 0.63, 0.65, 0.45); IV 3.46 (1.00, 0.33, 0.83, 0.80, 0.50). Ratio Cl/Met IV = 0.30, with 8 setae. Opisthosoma length 0.95, width 0.40. Opisthosoma white, without distinct pattern. Cribellum narrow, undivided. Pedipalpus (Figs 52–53, 55). Cymbium 0.20 long. Embolus long, filiform, originated at approximately 8-o’clock position. TA prolaterally short and simple; the prolateral apophysis conical, with blunt end. TA retrolateral large, with pointed apex, simple, with a single fold. Base of tibia with a big bifurcated spur. Female (one of the paratypes). Total body length 2.10 (Figs 56C–D). Prosoma length 0.90, width 0.70. Cephalic region width 0.43. Prosoma margin indistinct. Eye diameters: ALE 0.08, PLE 0.08, PME 0.05. Eye interdistances: ALE-PLE 0.02, PLE-PME 0.04, PME-PME 0.07, ALE-ALE 0.08. Eye region length 0.15, width 0.30. Clypeus height 0.08. Chelicerae length 0.40, width 0.20. Chelicerae with distinct lateral condyles, 3 promarginal and 4 retromarginal teeth. Labium length 0.11, width 0.18. Gnathocoxae length 0.25, width 0.16. Sternum length 0.55, width 0.42. Leg formula I-IV-II-III. Leg measurements: I 3.23 (0.95, 0.33, 0.80, 0.70, 0.45); II 2.78 (0.85, 0.30, 0.60, 0.63, 0.40); III 2.53 (0.75, 0.30, 0.55, 0.55, 0.38); IV 3.20 (0.95, 0.30, 0.75, 0.75, 0.45). Ratio Cl/Met IV = 0.43, with 8 setae. Opisthosoma length 1.25, width 1.00. Epigynum (Figs 54, 56A–B). Width 0.23. BO small and close. Bursae reduced. Copulatory ducts slender, twisted tightly (Figs 54A, 56B). Part of spermathecae slightly swollen, “C”-shaped. Variation. Total body length: males 1.8–1.9 (<i>n =</i> 2), females 1.9–2.35 (<i>n</i> = 12). Distribution. Known only from the type locality (Fig. 97).
description: Published as part of <i>Li, Shuqiang &amp; Wang, Xiaoxiao, 2017, New cave-dwelling spiders of the family Dictynidae (Arachnida: Araneae) from Guangxi and Guizhou, China, pp. 125-228 in Zoological Systematics 42 (2)</i> on pages 180-185, DOI: 10.11865/zs.201711, http://zenodo.org/record/5366040