Yuelushannus, Irfan & Zhou & Bashir & Mukhtar & Peng, 2020

Irfan, Muhammad, Zhou, Gu-chun, Bashir, Shahida, Mukhtar, Muhammad Khalid & Peng, Xian-jin, 2020, Yuelushannus gen. nov. (Araneae, Linyphiidae) from China, European Journal of Taxonomy 642, pp. 1-17 : 3

Yuelushannus gen. nov.

urn:lsid:zoobank.org:act:18108D03-0826-4EF0-BB3A-E90031CFD461

Figs 1–11

Type species: Yuelushannus barbatus sp. nov.

Etymology

The genus is named after the type locality (Yuelu) of the type species. Gender masculine.

Diagnosis

Male abdomen with two pairs of sigellae and distinct scutum at anterior two third. ( Figs 6 A–C, 7) as in Ceratinella Emerton, 1882 ( Ono et al. 2009: figs 63–66).The new genus can be differentiated from other genera on the basis of the following characters. Male carapace modified, cephalic pits present, the ocular region with thick spines pointing away from each other. Male palp: distal end of tibia dorsally with two tongue-shaped apophyses, densely covered with teeth ( Figs 6B , 7B ); embolus simple, sclerotized, very long and thick ( Figs 6 A–C, 7); anterior radical process as long as embolus, with distal frayed end ( Figs 6 A–C, 7). Epigyne: dorsal plate with scapus ( Figs 8–9 ) as in Paikiniana Eskov, 1992 ( Zhao & Li 2014: figs 75a–c, 76c–d); copulatory ducts column-shaped; spemathecae present at lateral sides of dorsal plate ( Figs 8–9 ).

Description

BODY. Small (1.75–1.9); male cephalic lobe and pits distinct, ocular area with thick spines; female palpal claw absent; AER slightly procurved, PER recurved; both male and female abdomen with four sigillae; tracheal system desmitracheate, with two trunks confined to abdomen. Chaetotaxy: 1–1–1–1. TmI 0.16– 0.25, TmIV 0.12–0.18; leg formula IV–I–II–III; legs yellow without obvious patterns.

MALE PALP ( Figs 1–2 , 6–7 ). Patella as long as tibia; tibia with one retrolateral and one dorsal trichobothrium, dorsally with two tongue-shaped apophyses, densely covered with teeth; paracymbium hookshaped; tegulum with long transparent protegulum; distal suprategular apophysis sclerotized, distal end curved, extending forward. Embolic division: tail piece long, slightly overlapping suprategulum; embolic membrane transparent, tapered towards tip; embolus long arc-shaped, distally connected with thick sclerotized anterior radical process, as long as embolus extending forward.

EPIGYNE ( Figs 3–4 , 8–9 ). Ventral plate concave, covered with thick spines; posterior margin of dorsal plate with scapus; copulatory openings between dorsal and ventral plate; copulatory ducts long, columnshaped; dorsolateral spermathecae separated by ¾ of their diameter; fertilization ducts small, extending mesally.

Natural History

Mainly lives under leaf litter layer of broad-leaved and shrubbery forest; breeding season from October through April; adapted to temperatures from 0°C to 39°C.

Distribution

China (Hunan Provice, Fig. 11 ).

Figures

Fig. 1. Yuelushannus alatus sp. nov., male palp, holotype (HNDWS-18-04~01). A. Prolateral view. B. Retrolateral view. C. Ventral view. D. Dorsal view. Scale bars: 0.1 mm.

Fig. 2. Yuelushannus alatus sp. nov., male palp, holotype (HNDWS-18-04~01). A. Prolateral view. B. Retrolateral view. Scale bars: 0.1 mm.

Fig. 3. Yuelushannus alatus sp. nov., female, allotype HNDWS-18-04~02. A. Epigyne, ventral view (before being dissected from the body). B. Epigyne, ventral view (after being dissected from the body). C. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 4. Yuelushannus alatus sp. nov., female, allotype HNDWS-18-04~02. A. Epigyne, ventral view. B. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 5. Yuelushannus alatus sp. nov., male, holotype HNDWS–18–04~01 (A–B, E–F) and female allotype HNDWS–18–04~02 (C–D, G). A, C. Habitus, dorsal view. B, D. Habitus, ventral view. E, G. Cephalothorax, dorsal view. F. Habitus, lateral view. Scale bars: A–D = 0.5 mm; E, G = 0.1 mm; F = 0.2 mm.

Fig. 6. Yuelushannus barbatus sp. nov., male palp, holotype YLS-17-0301~01. A. prolateral view. B. Retrolateral view. C. Ventral view. D. Dorsal view. E, F. Embolic division. Scale bars: 0.1 mm

Fig. 7. Yuelushannus barbatus sp. nov., male palp, holotype (HNU-YLS-17-0301~01). A. Prolateral view. B. Retrolateral view. Scale bars: 0.1 mm.

Fig. 8. Yuelushannus barbatus sp. nov., female, allotype (YLS-17-0301~02). A. Epigyne, ventral view (before being dissected from the body). B. Epigyne, ventral view (after being dissected from the body). C. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 9. Yuelushannus barbatus sp. nov., female, allotype (HNU-YLS-17-0301~02). A. Epigyne, ventral view. B. Vulva, dorsal view. Scale bars: 0.1 mm.

Fig. 10. Yuelushannus barbatus sp. nov., male, holotype, YLS–17–0301~01 (A–C) and female, allotype, YLS–17–0301~02 (D–F). A, D. Habitus, dorsal view. B, E. Habitus, lateral view. C, F. Habitus, ventral view. Scale bars: 0.5 mm.

Fig. 11. Distribution of Yuelushannus alatus sp. nov. (green dot) and Y. barbatus sp. nov. (red triangles).