Calcaeron, Kazantsev, Sergey V., 2004

Kazantsev, Sergey V., 2004, Contribution to the knowledge of Macrolycini with description of Calcaeron, new genus (Coleoptera, Lycidae), Zootaxa 493, pp. 1-32 : 22-23

Calcaeron gen. nov.

Type species: Calcaeron sundaicus sp. nov. (present designation)

Description

Head transverse, slightly narrowed behind eyes, conspicuously wider than pronotal anterior margin. Frons plane at blunt angle with vertex. Labrum transverse, feebly emarginated medially, not rigidly attached to epistomal sulcus. Eyes spherical. Mandibles small, evenly rounded. Palpomeres slender, with ultimate segment narrowed and glabrous at apex; maxillary palpi 4­segmented, labial palpi 3­segmented. Prementum undivided. Antennal prominence inconspicuous, antennal sockets more or less approximate. Antennae 11­segmented, compressed from antennomere 3; antennomeres 3 to 11 almost parallelsided. Antennomere 2 small, transverse and about 5 times shorter than antennomere 3. Antennal pubescence short and decumbent, with scaliform setae on antennomeres 3 to 11. Pronotum elongate, conspicuously produced anteriorly, with conspicuous hind angles; median suture manifest only in anterior half. Mesothoracic spiracles well sclerotized, not extending laterally beyond coxal line. Scutellum relatively wide, more or less parallelsided and almost not emarginate at apex. Mesepimeron narrow. Elytra slightly narrowing posteriorly, dehiscent behind middle, with three primary costae, costae 2 and 3 gradually weakening towards apex, costa 1 robust only basally, interstices with irregular reticulation; elytral pubescence uniform. Procoxae elongate, approximate distally; mesocoxae transverse, separated; metacoxae divided by sutures into presumably coxal, meral and trochantinal parts, with coxal/basal part similar to mesocoxa. Trochanters elongate, about 2 times longer than wide, but considerably shorter than femurs, connected to femurs apically; tibiae almost straight, subequal in length to pertinent femurs; protibiae with large inner unpaired spur (Fig. 48), other tibial spurs absent; tarsi narrow, tarsomere 4 slightly widened, plantar pads on tarsomeres 1 to 4, tarsomeres 1 and 2 with apical plantar pad; male claws feebly bifid apically (Fig. 49). Male ultimate sternite with long, basally asymmetrical spiculum gastrale (Fig. 50). Aedeagus with symmetrical median lobe and sclerotized internal sac and asymmetrical phallobase (Figs. 51–54).

Diagnosis

Calcaeron gen. n., being undoubtedly closely related to Mesolycus , can be easily separated by the conspicuous unpaired protibial spur (Fig. 48).

Etymology

Derived from the Latin "calcar" for "spur". Gender masculine.