Mimetus bucerus sp. nov.

urn:lsid:zoobank.org:act: D5CAEEF0-D171-45E9-A913-E391575E45E6

Figs 1–2, 7

Differential diagnosis

The male of this new species resembles that of M. lingbaoshanensis sp. nov., but can be distinguished from the latter by: 1) vexillum of male palp ox-horned in retrolateral view (Figs 1C, 2B) versus handlelike in M. lingbaoshanensis sp. nov. (Figs 3C, 4B); 2) distal portion of paracymbium claviform in retrolateral view (Figs 1C, 2B) versus lamelliform in M. lingbaoshanensis sp. nov. (Figs 3C, 4B); 3) tibia about 2 times longer than cymbium (Figs 1C, 2B) versus as long as cymbium in M. lingbaoshanensis sp. nov. (Figs 3C, 4B).

Etymology

The specific name comes from the Latin ‘ bucerus ’ (‘ox-horned’), refers to the shape of the vexillum of the cymbium.

Type material

Holotype CHINA • ♂; Guizhou, Tongren city, Leishan County, Leigongshan National Nature Reserve, Xiangshuiyan; 26°22′24″ N, 108°12′20″ E; 1642.1 m; 21 Jul. 2017, Cheng Wang, Feng-e Li, Gui-jie Tian and Hong Liu leg.; GZ-MIM-2017-005.

Description

Male (holotype)

MEASUREMENTS. Total length 2.92.

PROSOMA. 1.51 long, 1.32 wide, pear-like, yellow, with a longitudinal brown band, fovea oval, situated posteriorly (Fig. 1A),

CLYPEUS. 0.15 high.

EYE. Sizes and interdistances: AME 0.14, ALE 0.09, PME 0.11, PLE 0.10, AME–AME 0.13, ALE–AME 0.14, PME–PME 0.98, PME–PLE 0.17. MOA anterior width 0.49, posterior width 0.51, length 0.52.

CHELICERAE (Figs 2 C–D). Red-brown, with 10 promarginal peg setae and 2 retromarginal teeth. Endites light yellow, longer than wide. Labium light yellow, longer than wide. Sternum pear-shaped, glabrous, colouration as labium except for margin with few macrosetae.

LEGS. Slim, spiniferous, with brown patches. Length of legs: I 9.25 (2.51, 3.22, 2.41, 1.11), II 6.70 (1.89, 2.22, 1.58, 1.01), III 4.12 (1.28, 1.23, 0.82, 0.79), IV 4.97 (1.70, 1.45, 1.01, 0.81). Leg formula: 1243.

OPISTHOSOMA. 1.43 long, 1.31 wide, oval, with irregular red-brown patches and white spots, covered with sparse long hairs (Fig. 1A); ventral side with three brown patches, median area glabrous and grey, both sides with white spots.

PALP (Figs 1 B–C, 2A–B). Cymbium slightly domed, with a ox-horned vexillum and several long hairs at the apex (Figs 1 B–C, 2A–B).

PARACYMBIUM. Elongated, sclerotized, with irregular margin, a beak-like basal outgrowth and a claviform distal outgrowth in retrolateral view (Figs 1C, 2B).

BULB. With a semicircular subtegulum and a sheet-like membrane, the distal division sulciform, rolls up to protect the embolus (Figs 1 B–C, 2A–B).

EMBOLUS. Slender, band-shaped, with a pointed end (Figs 1B, 2A).

Female

Unknown.

Distribution

China (Guizhou, Fig. 7).