Orchestina zhiwui Liu, Xu & Henrard, 2019

Liu, Keke, Henrard, Arnaud, Xiao, Yonghong & Xu, Xiang, 2019, On three new oonopid species from China and the discovery of the male Orchestina bialata Liu, Xiao & Xu, 2016 (Araneae: Oonopidae), Zootaxa 4701 (3), pp. 235-256 : 250

Orchestina zhiwui Liu, Xu & Henrard , sp. nov.

( Figures 12−16 )

urn:lsid:zoobank.org:act:AC0492D8-BE8B-453F-9DBB-232ADE626FF0

Type material: Holotype: 1 male: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City , Longshi Town , Yuankou Village , bamboo forest, 26.695°N, 113.956°E, 272m, 1.V.2015, Zhiwu Chen, Keke Liu, Zeyuan Meng, Sha Wu, Shicong He and Yifan Zhao leg. ( OON 72 ) . Paratypes: 1 male: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City , Longshi Town , Land Resources Bureau in Eling department, leaf litter, 26.726°N, 114.123°E, 285m, 3.X.2015, Keke Liu, Zhiwu Chen, Zeyuan Meng, Qianqian Chen, Sha Wu and Yifan Zhao leg. ( OON 73 ) ; 1 male: China, Jiangxi Province: Ji’an City, Jinggangshan County Level City , Dalong Town , Yuantou Village , forest, 26.632°N, 114.106°E, 1029m, 5.IV.2014, Keke Liu, Xiaoping Huang, Zhiwu Chen, Yubao Tang and Zeyuan Meng leg. ( OON 74 ) .

Etymology: The species is named after mister Zhiwu Chen, who helped in the collection of the type specimens.

Diagnosis: Males of Orchestina zhiwui sp. nov. resemble to those of O. ampulla Henrard & Jocqué, 2012 , O. aureola Tong & Li, 2011 , O. clavulata Tong & Li, 2011 , O. saaristoi Henrard & Jocqué, 2012 , O. sinensis Xu, 1987 and O. thoracia Xu, 1987 in having an egg-shaped bulb with a conspicuous sperm duct and short embolus (see Henrard & Jocqué 2012, figs 43−45, 580−582; Tong & Li 2011, figs 6A−C, 7A−C; Xu 1987, figs 5, 6, 11, 12). However, it can be clearly distinguished by the endites with triangular, fin-shaped projection in anterior half ( Fig. 14I ) (elongated without a sub-distal projection in O. ampulla , O. aureola , O. clavulata , O. saaristoi , O. sinensis and O. thoracia ) and the short, cone-shape embolus with strongly enlarged base ( Fig. 15E ) (embolus with the relative slender base in O. ampulla , O. aureola , O. clavulata , O. saaristoi , O. sinensis and O. thoracia ) ( Henrard & Jocqué 2012; Tong & Li 2011; Xu 1987).

Description: Male holotype. Habitus as in Fig. 12 A−C. Total length 1.07. Carapace ( Figs 12A, B , D−F, 14A), yellow, length 0.54, width 0.42, broadly oval in dorsal view (CW/CL ≈ 0.78), anteriorly narrowed less than 0.5 its maximum width, pars cephalica strongly elevated in lateral view, with net-shaped pattern formed by tiny dark spots and narrow bands on surface. Eyes ( Figs 12A, B , D−G, 14A): PME almost circular, touching; diameters: ALE 0.05, PME 0.06, PLE 0.06, PME 1.2 times ALE; ALE−PME touching, ALE−PLE touching, PLE−PME separated from less than PME radius. Clypeus ( Figs 12A, B , D−F, 14A) wide, protruding anteriorly, with three setae on each rounded corner in front of ALE−PME junction. Sternum ( Figs 12C, H, I , 14D ) pale yellow with five obvious dark strips radiate from anterior center, shield shaped, slightly longer than wide, with scattered setae on the surface, with deep depression at base of labium and deep lateral pouch anteriorly. Mouthparts ( Figs 12C, E, H, I , 13A , 14 B−I): chelicerae yellow, straight, slightly divergent, dorsally with few scattered, long setae, without strong and converging setae on the distal part, base of fang with two groups of two long and fine setae; labium diamond-shaped, yellow brown with slightly sclerotized margins, with nine strong setae on anterior margin, seven setae including three setae in median on the surface and two groups of two setae in anterior lateral part; endites ( Figs 12C, H, I , 13A , 14 C−F, H, I) converging distally, anterior median tip divided in two parts: the lateral part with strongly sclerotized prong bearing triangular, fin-shaped projection and conspicuous serrula in distal and the median part membranous, with abundant, short, flattened setae in inner margin. Abdomen ( Fig. 12 A−C) almost globular in ventral view, length 0.57, width 0.51, soft portions of dorsum pale white, with gray netlike pattern and three dorsal herringbone band in dorsal view; pedicel tube short, unmodified. Book lung small, round. Spinnerets small, yellow. Legs ( Fig. 12A, B ) yellow, without color pattern; femur IV thickened, wider than femora I−III. Genitalia ( Figs 12 A−C, H, I, 13A−C, 15A−G): Palp yellow, femur distally with slight enlargement, connected to small triangular patella; tibia reniform, strongly enlarged (TW/TL ≈ 0.56), about three times as wide as femur, attached sub-basally to patella; cymbium oval, tapering apically, dorsally with numerous setae; bulb pale yellow, egg-shaped, length almost as long as tibia width, with ventral side strongly protruding distally; sperm duct S-shaped posteriorly, slender; embolus short, coneshape, with large base, distally blunt, with circular opening at tip.

Female: Unknown.

Distribution: Known only from Jiangxi Province ( Fig. 16 ).

Figures

FIGURE 12A–I. Orchestina zhiwui sp. nov., male holotype (OON 72). A. Habitus, dorsal view. B. As previous, slightly lateral, dorsal view. C.As previous, ventral view. D. Carapace, dorsal view. E. As previous, slightly dorsal, frontal view. F. Detail of carapace, slightly lateral, dorsal view. G. Eyes and clypeus, dorsal view. H. Mouthparts and palp, ventral view, the white arrow shows membranous part of endite and the black arrow indicates the sclerotized part. I. Sternum, ventral view. Scale bars: A−F, H, I, 0.1 mm; G, 20 µm.

FIGURE 13A–C. Orchestina zhiwui sp. nov., male holotype (OON 72). A. Endites and labium, ventral view. B. Left palp, prolateral view. C. As previous, retrolateral view. Scale bars: A, 50 µm; B, C, 0.1 mm.

FIGURE 14A–I. Orchestina zhiwui sp. nov., male paratype. A. Carapace (OON 73), slightly dorsal, frontal view, the white arrow shows the clypeus with two groups of 3 setae on laterally rounded corners near ALE. B. Chelicerae, slightly lateral, frontal view (OON 73). C. As previous, ventral view, the white arrows show a pair of 2 feather-like setae at base of fang (OON 73). D. Carapace, ventral view (OON 73). E. Mouthparts, ventral view (OON 74). F. Mouthparts, ventral view (OON 74). G. Labium, stars indicate the middle part with 7 needle-like setae including 3 setae in center and two groups of 2 setae in lateral part, ventral view (OON 74). H. Endites, ventral view (OON 74). I. Detail of endites, ventral view, the white arrow shows the sclerotized part and the black arrow indicates the membranous part (OON 74). Scale bars: A−C, E, G, 20 µm; D, 0.1 mm; F, H, I, 10 µm.

FIGURE 15A–G. Orchestina zhiwui sp. nov., male paratype (OON 73). A. Left palp, prolateral view. B. As previous, slightly lateral, dorsal view. C. As previous, retrolateral view. D. Bulb and embolus, dorsal view. E. Embolus, prolateral view. F. Detail of embolus, prolateral view. G. Detail of embolus, slightly frontal view. Scale bars: A, 0.1 mm; B, 30 µm; C, D, 20 µm; E, 10 µm; F, G, 2 µm.

FIGURE 16. Collection localities for Ischnothyreus tergeminus sp. nov., Orchestina colubrina sp. nov., O. bialata Liu, Xiao & Xu, 2016 and O. zhiwui sp. nov. in China.