Heterocerus evzeni, Skalický, 2018

Skalický, Stanislav, 2018, Heterocerus evzeni nov. sp. from Mexico (Coleoptera, Heteroceridae), Linzer biologische Beiträge 50 (2), pp. 1657-1660 : 1657-1658

Heterocerus evzeni nov.sp.

T y p e m a t e r i a l: Holotype: ♂: " Mexico – Jalisco Chamela 15.X.2016 S. Prepsl leg." // " Holotype Heterocerus evzeni SKALICKÝ 2018 Det. Skalický 2018 " [red label] CSU.

D e s c r i p t i o n: Total length 2.55 mm (to apex of labrum); elytra 1.45 mm long, 0.90 mm wide across shoulders. Ground colour black to brown with ochre pattern as in Fig. 1 , labrum and head black, mandibles pale brown, antennae pale brown with darker club, legs pale brown, tibiae darker laterally. Ventral surface brown, abdomen pale brown. Labrum ( Fig. 2 ) short, visible part almost square, lateral angles rounded, softly serrate in median portion with dense short setae. Mandibles ( Fig. 2 ) short and robust, dorsal subapical tooth rounded, dental lobe with two spines. Prostheca with teeth on dental lobe, without prosthecal notch. Antennae 11-segmented, with 7-segmented club, scape triangular, pedicel oval, antennomeres 1 and 2 with sparse long erect setae. Clypeus ( Fig. 2 ) without pair of anterior horns, anterior margin shallowly emarginate, with dense, short, pale setae intermixed with long erect ones. Head finely granular, setae sparse, short, intermixed with long erect setae above eyes. Pronotum as wide as the base of elytra, oval, pronotal base completely rimmed; surface densely regularly granular, setae sparse, long, erect. Scutellum pointed, triangular, about 1.5 times longer that wide. Elytra without longitudinal furrows and without scutellar depressions, humeral depressions shallow and short. Surface of elytra microgranular, with intermixed punctures approximately twice large as eye facets. Setae on elytra yellowish, double, short adjacent and long semi-erected long. Epipleural ridges absent. Ventral surface sparsely setose. Metasternum with post-mesocoxal ridge. Mesosternum with a pair of spines in front of each mesocoxa. Protibia with 10 stout spines along its lateral margin and two spines at its inner apical angle, mesotibia with 9 weak and metatibia with an uncertain number of thin spines. Tibiae with dense, long setae. Post-metacoxal line absent. Stridulatory arch marked, with striae. Spiculum gastrale 0.5 mm long, V-shaped as in Fig. 3 , arms connected by membrane apically. Aedeagus 0.50 mm long, well sclerotized, shape as in Figs. 4-8 .

Female: unknown.

D i f f e r e n t i a l d i a g n o s i s:Theshapeoftheaedeagusof H. evzeni nov.sp. differs from that of all known species of the genus. Partially similar appearance of male genitalia (oval phallobase with long and narrow parameters) is known from the Nepalese species Augyles hartmanni MASCAGNI, 2003 (see Figs 5-6 in MASCAGNI 2003).

E t y m o l o g y: The new species is named after my beloved tomcat Evžen.

Figures

Figs 1-8: Heterocerus evzeni nov.sp., holotype. (1) pronotum and elytra, dorsal view; (2) labrum, left mandible and clypeus, dorsal view; (3) spiculum gastrale, dorsal view; (4) aedeagus, dorsal view; (5) parameres and phallobase dorsal view; (6) the same, lateral view; (7) penis, dorsal view; (8) the same, lateral view.Figs 1-2 not in scale.