Currhaeus, Nascimento & Bressan & Bocakova, 2020

Nascimento, Elynton Alves Do, Bressan, Tamires Diniz & Bocakova, Milada, 2020, Currhaeus a new genus of net-winged beetles and phylogenetic analysis of Eurrhacini (Coleoptera: Lycidae: Lycinae), Zootaxa 4869 (3), pp. 387-403 : 391-392

publication ID 10.11646/zootaxa.4869.3.5

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gen. nov.

Currhaeus gen. nov.

Type species: Currhaeus striatus sp. nov.

Diagnosis: Currhaeus is described herein only from males and can be differentiated from all other Eurrhacini genera by the combination of the following characters: maxillary palpomere 2 longer than 4 (shorter or as long as palpomere 4 in other Eurrhacini ); male antennae flabellate (filiform only in Haplobothris ); pronotum subpentagonal, almost as long as wide medially (considerably elongate in Calocladon ); longitudinal carinae on pronotum forming thin areola at basal 1/3 to 2/3 (similar only to Lycoplateros , whose pronotum has medioposterior projection usually covering half of scutellum); male genitalia lacking parameres (feature shared only with Eurrhacus ); phallus Sshaped, twisted clockwise from proximal to distal perspective (while simply rod-like in Eurrhacus ). Anterior end of phallus fused to phallobase (in Eurrhacus phallus is fused to parameres), suspensorial arms flattened, dorsal margin of phallobase often with lateroapical thorns.

Description: Coloration. Head, antennae, thorax and abdomen dark brown. Pronotum with brown median patch and margins yellow. Elytral coloration variable forming yellow/dark brown patterns ( Figs. 4–10 View FIGURES 4–10 ).

Head largely covered by pronotum. Eyes medium to large, eye diameter 1.4–2.0× longer than interocular distance.Antennae flabellate, length of branches increasing apically ( Fig. 1 View FIGURES 1–3 ). Labrum anteriorly emarginate. Mandibles well developed, curved. Maxillary palpi elongate, ultimate palpomere apically rounded, apical margin flattened dorsoventrally, palpomere 2 about 2–3× longer than 3 and 1.2–1.6× longer than 4 ( Fig. 2 View FIGURES 1–3 ). Labial palpi short. Pronotum, subpentagonal, widest at basal margin, sometimes almost parallel-sided, basal margin bisinuous, median longitudinal carina moderately divergent medially forming extremely slender areola at posterior 1/2–1/3, or sometimes slightly widened at basal 1/3 ( Fig. 3 View FIGURES 1–3 ). Prosternum triangular to trapezoidal, mesoventrite trapezoidal. Scutellum with shallow distal emargination. Elytra elongate, each elytron with four strong primary costae (costae 2 and 4 more elevated), and five weak secondary costae. Intercostal intervals provided with irregular subrectangular or subquadrate to oval cells ( Figs. 4–10 View FIGURES 4–10 ). Legs slightly flattened, hind femora as long as tibiae, 2.7–3.6× longer than trochanter length. Attachment of femur to trochanter variably oblique. Abdomen with a shallow median distal emargination on 7th ventrite, 8th elongate, rounded apically and pointed basally. Aedeagus slender and elongate, Sshaped, twisted clockwise, dorsoventrally compressed in median portion in lateral aspect ( Figs. 11D, 13D View FIGURES 11–14 ), widened at this portion in dorsal aspect ( Fig. 11A View FIGURES 11–14 ). Apex sometimes bent to right in dorsal view, showing distal expansion. Phallus apex exposed and explanate in dead specimens. Parameres absent, no indication of rudiments. Phallobase elongate, considerably wider than phallus, medially fused to phallus, suspensorial arms flattened, dorsal margin of phallobase often with lateroapical thorns ( Figs. 11–17 View FIGURES 11–14 View FIGURES 15–17 ). Females are unknown.

Etymology: The name of the new genus is an anagram of the genus Eurrhacus Waterhouse, 1879 , referring to close relationships of Currhaeus gen. nov. to Eurrhacus .

Distribution: Brazil, Panama and Mexico ( Fig. 18 View FIGURE 18 ).

Composition: The genus Currhaeus described here comprises seven new species: C. striatus sp. nov., C. nigroapicalis sp. nov., C. championi sp. nov., C. tabascensis sp. nov., C. ruschii sp. nov., C. polegattoi sp. nov., and C. paranaensis sp. nov.











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