Guiaphaenops deuvei Tian, Feng & Wei

Feng, Bin, Wei, Guofu & Tian, Mingyi, 2017, A review of the cavernicolous genus Guiaphaenops Deuve, with the description of a new species (Coleoptera, Carabidae, Trechinae), ZooKeys 669, pp. 53-63 : 55-57

Guiaphaenops deuvei Tian, Feng & Wei sp. n. Figs 1c, 2, 3a, 4a, 5a, b, 6

Holotype.

male, an anonymous cave near Yangli Cun, Jiayou Zhen, Lingyun Xian, Baise Shi, Guangxi, 24°28'39"N, 106°37'52"E, 643 m, VII-25-2012, Mingyi Tian, Weixin Liu, Feifei Sun & Haomin Yin leg., in South China Agricultural University, Guangzhou, China (SCAU).

Diagnosis.

A larger species, latero-margins of pronotum strongly sinuate before hind angles which are distinctly lobed and reflexed (Fig. 3a); the 1st pore of the humeral set of umbilicate pores at level before anterior dorsal pore, while the 7th pore behind the level of the preapical pore (Fig. 4a); the median lobe of aedeagus a little slenderer, with apical lobe narrowly constricted towards apex in dorsal view (Fig. 5a, b).

Description.

Length: 7.0 mm, width: 2.0 mm. Fore body (including mandibles) shorter than elytra. Habitus as in Fig. 2.

Yellowish brown, with pale appendages. Moderately shiny. Body smooth and glabrous, except genae, underside of head and prosternum each with several sparse setae, ventrites IV-VI with a few short setae between paramedian setae. Microsculptural engraved meshes finely transverse striated.

Head much longer than wide (HLm/HW = 2.45, HLl/HW = 1.75); genae fairly developed, slightly dilated laterally, slightly constricted posteriorly until the well-marked neck constriction; widest at about middle of head from labrum to base; frons and vertex convex, frontal furrows deep and well-marked, divergent at base and apex, ended a little behind the widest part; clypeus transverse, quadrisetose; labrum transverse, frontal margin more or less serrate, 6-setose; anterior and posterior frontal setiferous pores located at about middle of head from labrum to neck constriction and 1/3 from base to labrum respectively; ligula well developed, bisetose at apex; submentum 8-setose. Antennae long, the 1st antennomere stouter than other, slightly shorter than the 2nd which is slightly shorter than the 11th; the 5th and 6th longest, each about twice as long as the 1st, then gradually shortened towards the 10th.

Prothorax (Fig. 3a) shorter than head (PrL/HLm = 0.55, PrL/HLl = 0.77), widest at about 1/3 from base, longer than wide (PrL/PrW = 1.08), wider than head (PrW/HW = 1.25), slightly wider than pronotum (PrW/PnW = 1.11), much narrower than elytra (PrW/EW = 0.46). Pronotum (Fig. 3a) longer than wide (PnL/PnW = 1.20), and wider than head (PnW/HW = 1.13), base wider than front (PbW/PfW = 1.29); lateral sides and finely bordered throughout, base and front unbordered; lateral margin slightly expanded medially, widest at a little behind middle, strongly sinuate before hind angles which are broadly lobed, fore angle obtuse; latero-marginal setae at about 1/4 of pronotum from front and a little before hind angles respectively. Scutellum small.

Elytra (Fig. 4a) longer than head plus prothorax (EL/(HL+PrL) = 1.21), longer than wide (EL/EW = 1.71); widest at about middle, prehumeral borders evidently ciliate, and nearly oblique; disc moderately convex; striae present though superficial. Chaetotaxy: anterior and posterior dorsal pores at about 1/5 of elytra from base and middle of elytra, preapical pore at 1/6 of elytra from apex, much closer to suture than to apical margin; the 1st pore of the humeral set of umbilicate pores located before anterior dorsal pore, while the 7th pore behind the preapical.

Legs thin and rather long, the 1st tarsomere as long as the 2 nd– 4th tarsomeres together in fore, but longer in middle and hind legs.

Male genitalia (Fig. 5a, b): Weakly sclerotized, small but stouter than in G. lingyunensis , apical lobe narrower at apical part.

Etymology.

Dedicated to Dr. Thierry Deuve of the National Museum of Natural History, Paris, a well-known carabidologist who has described many new ground beetles of China.

Distribution.

China (Guangxi) (Fig. 1c). Known only from the limestone cave near Yangli, Jiayou, Lingyun Xian. This cave opens at bottom of a hill near Yangli Cun on the right side of the road from Lingyun to Leye. It is short cave and the large part inside was dry. The single type specimen was collected in a small wet area. Other cave animals observed in this cave were millipedes, crickets and bats.