Pseudochillus, Fouquè, 2015

Fouquè, René, 2015, A review of the genera Indostola, Tagenostola, Indochillus, Pseudethas, and Pseudochillus gen. nov. in South East Asia (Coleoptera: Tenebrionidae: Stenosini), Acta Entomologica Musei Nationalis Pragae 55 (1), pp. 217-242 : 226

Pseudochillus gen. nov.

Type species. Indochillus bangaloreanus Kaszab, 1981 , here designated.

Description. Body length 3.15–6.2 mm. Eyes completely divided by genae. Inner side of eyes with suborbital keel which is sometimes somewhat reduced. Genae widest before anterior margin of eyes. Tempora convex, narrowing to cervical constriction. Clypeus often concave with small tooth ( Fig. 13 ), sometimes without tooth and straight. Antennomere 3 longer than antennomere 4. Pronotum with dense punctation, sometimes with mid-longitudinal impression. Pronotum longer than wide, widest between anterior quarter and anterior third. Lateral margin concave before pronotal base. Elytra oval, elytral base at most as wide as pronotal base. Elytra with 10 rows of punctures and 4 keels in intervals 3, 5, 7, and 9. Junction of interval 7 and 9 sometimes forming a small obliquely directed humeral corner ( Figs 14–15 ). Wings absent. Posterior tibiae longer and thinner, width/length ratio of posterior tibia more than 0.16. Differential diagnosis. Pseudochillus gen. nov. can be distinguished from two closely related genera, Indochillus Koch, 1941 and Pseudethas Fairmaire, 1896 , by elytral base at most as wide as pronotal base. Pseudochillus also has convex tempora; occiput without impression or with not sharply bordered impression withouth mid-longitudinal keel; antennomere 3 longer than antennomere 4; width/length ratio of posterior tibia more than 0.17, while Indochillus Koch, 1941 has concave tempora; occiput with sharply bordered triangular impression with midlongitudinal keel; antennomere 3 as long as antennomere 4; width/length ratio of posterior tibia 0.20.

Etymology. The name is a combination of Greek pseudo- (= false) and part of the name of the genus Indochillus for their close relation, gender masculine.

Figures

Figs 10–16. 10–12 – dorsal view:10 – Pseudochillus (Micropseudochillus) palawanus sp.nov., holotype♂, Philippines (Palawan); 11 – P.(M.) thailandicus sp. nov., holotype ♂, Thailand.; 12 – P.(M.) indochinensis sp. nov., paratype ♀, Vietnam. 13 – P.(M.) indochinensis sp. nov., tooth on clypeus; 14–15 – humeral corner: 14 – P.(Kaszabochillus) helferi sp. nov.; 15 – P.(Pseudochillus) bangaloreanus (Kaszab, 1981). 16 – P.(P.) bangaloreanus (Kaszab, 1981), punctures on epipleura. Scale bar = 4 mm (Figs 10–12).