Brommella linyuchengi 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 : 153-158

publication ID

https://doi.org/ 10.11865/zs.201711

publication LSID

lsid:zoobank.org:pub:AB92E114-07FF-41A5-AF24-DF04F8232CA5

DOI

https://doi.org/10.5281/zenodo.5459561

persistent identifier

https://treatment.plazi.org/id/039E87CA-9774-FF98-FF73-7CE76B72F86E

treatment provided by

Diego

scientific name

Brommella linyuchengi Li
status

sp. nov.

Brommella linyuchengi Li View in CoL , sp. nov. ( Figs 26–30 View Figure 26 View Figure 27 View Figure 28 View Figure 29 View Figure 30 , 97 View Figure 97 )

Type material. Holotype. Male, China, Guangxi, Nanning City , Wuming County, Chengdong Town , Xiahuang Village , Taiji Cave , 23°11.050´N, 108°19.818´E, elev. 111 m, 20 October 2010, X. Wang & L. Lin leg., deposited in IZCAS GoogleMaps . Paratypes. 10 males, 7 females, same data as holotype, deposited in IZCAS GoogleMaps .

Etymology. The specific name is a patronym in honor of Prof. Yucheng Li from Sichuan University in Chengdu; noun in apposition. Prof. Lin is a leading taxonomist in Mysmenidae .

Diagnosis. The new species is similar to B. punctosparsa (Song, Zhu & Chen, 1999: 363, figs 213K–N), but can be distinguished by the widely separated copulatory openings (close in B. punctosparsa ), the bent median apophysis (obtuse triangle-shaped in B. punctosparsa ), and the dorsal lobe of epigynum acuminate and straight (hooked in B. punctosparsa ).

Description. Male (holotype). Total body length 2.25 ( Fig. 30E View Figure 30 ). Prosoma length 1.00, width 1.03. Dorsal shield of prosoma yellow-brown. Cephalic region width 0.45, relatively flat, covered with several setae. Fovea reduced. Cervical groove indistinct. Six eyes, AME absent, all eyes white, encircled with black. Eye sizes and interdistances: ALE 0.08, PLE 0.09, PME 0.05; ALE-PLE 0.01, PLE-PME 0.02, PME-PME 0.06, ALE-ALE 0.05. Eye region length 0.14, width 0.27. Clypeus height 0.10. Chelicerae length 0.43, width 0.20. Chelicerae with distinct lateral condyles, 3 promarginal and 4 retromarginal teeth. Chelicerae yellow-brown. Labium and gnathocoxae yellow-brown, sternum yellow. Labium length 0.13, width 0.20. Gnathocoxae length 0.30, width 0.13. Sternum length 0.63, width 0.55. Legs yellow. Leg formula I-IV-II-III. Leg measurements: I 4.16 (1.20, 0.38, 1.10, 0.90, 0.58); II 3.50 (1.00, 0.35, 0.85, 0.80, 0.50); III 2.96 (0.85, 0.33, 0.65, 0.70, 0.43); IV 3.90 (1.15, 0.30, 1.00, 0.95, 0.50). Ratio Cl/Met IV = 0.34, with 5 setae. Opisthosoma length 1.25, width 0.85, pale yellow, without distinct pattern. Cribellum narrow, undivided.

Pedipalpus ( Figs 26–27 View Figure 26 View Figure 27 , 29 View Figure 29 ). Cymbium 0.38 long. Embolus long, filiform, originating at approximately 7-o’clock position. TA prolaterally short and simple, with a tiny, sharply pointed apophysis. Prolateral part of TA with an upward bending apophysis. RTA large, simple, pointed distally, with a single fold. Base of tibia with a big bifurcated spur.

Female (one of the paratypes). Total body length 2.00 ( Figs 30C–D View Figure 30 ). Prosoma length 0.82, width 0.63. Cephalic region width 0.45. Eye sizes and interdistances: ALE 0.06, PLE 0.07, PME 0.04; ALE-PLE 0.01, PLE-PME 0.03, PME-PME 0.05, ALE-ALE 0.05. Eye region length 0.14, width 0.25. Clypeus height 0.09. Chelicerae length 0.39, width 0.18. Chelicerae with distinct lateral condyles, 3 promarginal and 5 retromarginal teeth. Labium length 0.13, width 0.20. Gnathocoxae length 0.33, width 0.18. Sternum length 0.63, width 0.55. Leg formula I-IV-II-III. Leg measurements: I 2.72 (0.83, 0.28, 0.68, 0.55, 0.38); II 2.30 (0.70, 0.25, 0.50, 0.50, 0.35); III 2.09 (0.63, 0.25, 0.45, 0.45, 0.31); IV 2.69 (0.80, 0.28, 0.63, 0.63, 0.35). Ratio Cl/Met IV = 0.27, with 5 setae. Opisthosoma length 1.20, width 0.88.

Epigynum ( Figs 28 View Figure 28 , 30A–B View Figure 30 ). Width 0.22. BO strongly sclerotized, widely separated. Bursae reduced. Copulatory ducts twisted tightly. Spermathecae parts not enlarged, “S”-shaped.

Variation. Total body length: males 1.80–2.30 (n = 11), females 1.70–2.50 (n = 7).

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

IZCAS

Institute of Zoology, Chinese Academy of Sciences

TA

Timescale Adventures Research and Interpretive Center

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Dictynidae

Genus

Brommella

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