Lingulatus longulus, Mu & Zhang, 2022

Mu, Yannan & Zhang, Feng, 2022, Lingulatus gen. nov., a new genus with description of three new species and one new combination (Araneae: Phrurolithidae), Zootaxa 5178 (3), pp. 265-277 : 271-272

Lingulatus longulus sp. nov. (Kfflfl)

Figs 1D , 5–6 , 9

Type material. Holotype ♂: CHINA: Sichuan Province: Yibin City, Xingwen County, Shihai Town (28°11′27.42″N, 105°08′14.15″E), 853 m a.s.l., 9.VII.2021, leg. Hongru Xu.

Etymology. The specific name is derived from the Latin word “ longulus ”, referring to the long tegular sheet; adjective.

Diagnosis. This new species is most similar to L. pingbian sp. nov. by having a flake-shaped embolus and long TS, but can be distinguished by: 1) the TS located prolaterally on the tegulum (vs ventrally); 2) the thin, flakeshaped embolus (vs broad); 3) the triangular TA (vs absent). It can also be distinguished from L. brevis sp. nov. by: 1) the long TS (vs short); and 2) the flake-shaped embolus (vs acicular).

Description. Male (holotype): total length 2.99, carapace 1.45 long, 1.23 wide; abdomen 1.54 long, 0.98 wide. Carapace nearly round, black, smooth. Cervical groove inconspicuous. Fovea dark red, long, with several markings resembling flowing water droplets beside fovea. Eye sizes and interdistances: AME 0.08, ALE 0.08, PME 0.08, PLE 0.09; AME–AME 0.05, AME–ALE 0.02, ALE–ALE 0.23, PME–PME 0.10, PME–PLE 0.04, PLE–PLE 0.35, ALE–PLE 0.06. EAW 0.49, CRW 0.62, EAW/CRW 0.79, CRW/CW 0.50. MOA 0.23 long, anterior width 0.20, posterior width 0.27. CH 0.12, CH /AME 1.50. Labium 0.15 long, 0.21 wide. Sternum 0.80 long, 0.76 wide. Abdomen black, with dense hairs, with medium-sized dorsal scutum, narrower than abdomen width and more than half length of abdomen. Four transverse light color stripes vaguely visible on posterior of dorsal scutum. Row of transverse white hairs anterior to anal tubercle. Sternum brown, without pattern. Labium and endite as same color as sternum. Abdomen yellow in ventral view, black around spinnerets. Legs yellow, with distinct black annuli on distal ends of femora and tibiae.

Palp as in Figs 6A–D . FA strongly raised, thumb-shaped, located at middle part. Tibia shortest, cymbium longest, patella shorter than femur. A round vTA with long and thin tip on ventral of tibia; RTA medium in size, with broad base and curved thin tip; rDTA long and large, with broad base and curved tip directed prolaterally. Sperm duct distinct, “U” shaped, occupying more than 1/2 length of tegulum in prolateral view. Tegulum oval, tegular apophysis small, triangular. TS long and wide, originating on prolateral side of tegulum, located at base of embolus, with small apophysis directed towards anterior, extending past posterior edge of tegulum. Embolus base wide, tapering off from base to tip, tip flake-shaped and slightly curved. Conductor absent.

Leg measurements:

Distribution. China (Sichuan Province)

Figures

FIGURE 1. Left chelicerae: A. Lingulatus pingbian sp. nov., retromarginal view (male holotype); B. Same, retromarginal view (female paratype); C. Same, promarginal view (female paratype); D. L. longulus sp. nov., retromarginal view (male holotype); E. L. brevis sp. nov., retromarginal view (male holotype); F. Same, retromarginal view (female paratype).

FIGURE 5. Habitus of Lingulatus longulus sp. nov.: A. Male holotype, dorsal view; B. Same, ventral view. Abbreviations: DS—dorsal scutum.

FIGURE 6. Lingulatus longulus sp. nov.: A. Male left palp, prolateral view; B. Same, ventral view; C. Same, retrolateral view; D. Same, dorsal view. Abbreviations: E—embolus; FA—femoral apophysis; rDTA—retrodorsal tibial apophysis; RTA— retrolateral tibial apophysis; TA—tegular apophysis; TS—tegular sheet; vTA—ventral tibial apophysis.

FIGURE 9. Distribution of Lingulatus gen. nov., (triangle: L. longulus sp. nov.; square: L. pingbian sp. nov.; circle: L. brevis sp. nov.; pentagon: L. christae (Jäger & Wunderlich, 2012) comb. n.).