Brommella spirula 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 : 170

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-9745-FF94-FF73-7DC86B72FFE6
treatment provided by	Diego
scientific name	Brommella spirula Li
status	sp. nov.

Treatment

Brommella spirula Li View in CoL , sp. nov. ( Figs 40–44 View Figure 40 View Figure 41 View Figure 42 View Figure 43 View Figure 44 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Baise City , Tiandong County, Silin Town , Guangyang Village , Guangyang Cave , 23º31.106'N, 107º23.623'E, elev. 374 m, 02 August 2011, X. Wang leg., deposited in IZCAS GoogleMaps . Paratypes. 1 male, 37 females, same data as holotype, deposited in IZCAS GoogleMaps .

Etymology. The specific name is derived from the Latin word “ spirula ”, meaning “spiral”, and refers to the shape of female copulatory ducts; noun in apposition.

Diagnosis. Female of this new species is similar to B. chongzuoensis Li , sp. nov. ( Figs 9–10 View Figure 9 View Figure 10 ), but can be distinguished by the small brusal openings (BO very large in B. chongzuoensis Li , sp. nov.), the copulatory ducts coiled tightly as spring (more loose coiled in B. chongzuoensis Li , sp. nov.); males of this new species appear almost identifical with B. dolabrata Li , sp. nov. ( Figs 11–15 View Figure 11 View Figure 12 View Figure 13 View Figure 14 View Figure 15 ), but can be distinguished by the shape of apophysis (straight in B. dolabrata Li , sp. nov.), the tip of spur pointed and hooked (apex of spur broad in B. dolabrata Li , sp. nov.).

Description. Male (holotype). Total length 2.72 ( Fig. 44E View Figure 44 ). Prosoma length 1.20, width 1.00. Cephalic region width 0.60. Dorsal shield of prosoma yellow, with relatively flat cephalic area. Fovea reduced, cervical groove indistinct. Six eyes, AME absent, all eyes white, encircled with black. Eye diameters: ALE 0.15, PLE 0.10, PME 0.08. Eye interdistances: ALE- PLE 0.02, PLE-PME 0.04, PME-PME 0.07, ALE-ALE 0.06. Clypeus height 0.14. Chelicerae length 0.48, width 0.23, with distinct lateral condyles, and 3 promarginal and 4 retromarginal teeth. Cheliceraes, labium and gnathocoxae yellow-brown, sternum yellow. Labium length 0.13, width 0.22; gnathocoxae length 0.35, width 0.22; sternum length 0.74, width 0.69. Legs yellow. Leg formula I-IV-II-III. Leg measurements: I 6.01 (1.65, 0.45, 1.63, 1.40, 0.88); II 4.78 (1.38, 0.40, 1.15, 1.10, 0.75); III 4.23 (1.20, 0.40, 0.93, 1.05, 0.65); IV 5.56 (1.55, 0.40, 1.35, 1.43, 0.83). Ratio Cl/Met IV = 0.38, with 6 setae. Opisthosoma length 1.50, width 1.13. Opisthosoma oval, dorsum white, with several dark-green spots, venter white. Cribellum narrow, undivided.

Pedipalpus ( Figs 40–41 View Figure 40 View Figure 41 , 43 View Figure 43 ). Cymbium 1.11 long. Cymbium narrowed distally, ratio length/width = 2.43. Embolus slender, ribbon shaped, originating at approximately 6-o’clock position, TA prolaterally slim, strongly sclerotized, pointing to retrolateral. TA retrolateral large, with a single fold.

Female (one of the paratypes). Total length 3.35 ( Figs 44C–D View Figure 44 ). Prosoma length 1.30; width 1.08. Cephalic region width 0.53. Eye diameters: ALE 0.12, PLE 0.11, PME 0.09. Eye interdistances: ALE-PLE 0.04, PLE-PME 0.05, PME-PME 0.08, ALE-ALE 0.08. Clypeus height 0.13. Chelicerae length 0.53, width 0.30, with distinct lateral condyles, 5 promarginal and 7 retromarginal teeth. Labium length 0.17, width 0.25. Gnathocoxae length 0.45, width 0.25. Sternum length 0.83, width 0.75. Leg formula I-IV-II-III. Leg measurements: I 6.08 (1.75, 0.50, 1.55, 1.40, 0.88); II 4.69 (1.35, 0.48, 1.13, 1.00, 0.73); III 4.19 (1.20, 0.43, 0.93, 0.98, 0.65); IV 5.41 (1.63, 0.45, 1.25, 1.30, 0.78). Opisthosoma length 2.20, width 1.55. Ratio Cl/Met IV = 0.4, with 10 setae.

Epigynum ( Figs 42 View Figure 42 , 44A–B View Figure 44 ). Width 0.58. Small BO situated in the centre of epigynum, small, their sclerotized rims convex relative to centre of epigynum. Bursae developed. Copulatory ducts tightly coiled as doubled spring. Spermathecae small, ball shaped. Fertilization duct internally attached at base of spermathecae.

Variation. Total length: males 2.72–3.00 (n = 2), females 2.50–3.35 (n = 37).

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