Lycorectus sordidus ( Gorham, 1880 ), 2025

González-Ramírez, Mireya, Zaragoza-Caballero, Santiago, Morrone, Juan J. & Ochoterena-Booth, Helga, 2025, A phylogenetic analysis based on morphology reveals the placement of Lycomesus Zaragoza-Caballero & González-Ramírez, 2019 and Lyconotus Green, 1949 within Lycini (Coleoptera: Lycidae), with the description of a new genus from North America, European Journal of Taxonomy 1022, pp. 202-242 : 227-230

Lycorectus sordidus ( Gorham, 1880) gen. et comb. nov.

Figs 6L, 10–11

Lycostomus sordidus Gorham, 1880: 5 .

Diagnosis

Lycorectus sordidus gen. et comb. nov. is closely related to Rhyncheros championi . In both species, the elytra are weakly dilated, and the tibiae are strongly curved. The most notable differences between R. championi and L. sordidus are observed in the width of the rostrum. In R. championi , the rostrum is slender, whereas in L. sordidus , it is robust. The length of the antennae differs between the two species. In R. championi , the antennae are relatively short, while in L. sordidus , they are considerably longer. The width of the macula of the pronotum may be narrow in R. championi but is broad in L. sordidus . The colouration of the elytra is distinct in the two species. The humeral region and sides of the pronotum of R. championi are fulvous, whereas in L. sordidus , this colouration is limited to the humeral region. In addition, the colouration of the apex of the femora and the abdomen in R. championi is rufo-testaceous, whereas in L. sordidus it is dark brown.

Material examined

Syntype

GUATEMALA • ♀; “Calderas, / Guatemala, / Champion // B.C.C. Col. III. (2) / Lycostomus / sordidus // ( Lycus ) / Lycostomus / sordidus , G // Type // Type. / Sp. figured”; NHMUK 014591974 .

Other material examined

COSTA RICA • 1 ♂; km 12 Turrialba–Siquirres ; 25 Apr. 1984; E. Barrera leg.; CNIN, QR 68429 .

MEXICO • 1 ♀; C. Hoffmann leg.; Col. Coleoptera ; CNIN, QR 68430 .

Redescription

Female ( syntype)

MEASUREMENTS. Length of body 11.22 mm; width 3.63 mm.

COLOUR. Body slender; general coloration dark brown, except for the sides of the pronotum and the humeral margin of the elytra, which are yellowish ( Fig. 10A). Body with dorsal setae fine, short, pubescence yellowish ( Fig. 10B).

HEAD. Prognathous; interocular space concave, integument brilliant and pilose; interantennal distance ( 0.05 mm) less wide than antennal fossae ( 0.44 mm); eyes finely faceted, semispherical, not prominent, longer ( 0.46 mm) than wide ( 0.30 mm); antennae serrated, long, exceeding beyond posterior coxae, antennomere III longer than antennomere IV; rostrum longer ( 0.74 mm) than wide ( 0.55 mm); labrum semi-square, anterior margin straight; mandibles straight, slender and slightly curved at apex, as long as labrum; last maxillary and labial palpomere long, distally flattened, and more or less dilated.

THORAX. Pronotum wider ( 2.96 mm) than long ( 1.56 mm), subpentagonal, transverse, with roughly dotted surface, anterior and lateral margins widely rounded, pronotal margin 0.80 mm wide, anterior angles non-prominent, decumbent setae; prosternum strongly carinated; scutellum subquadrangular, longer than wide, with emarginated posterior border; elytra long, slightly dilated at base, four times as long ( 11.36 mm) as wide ( 2.09 mm), surface rugose, opaque; long legs, pro and mesolegs similar to each other, the metalegs longer, fusiform femurs, tibia channelled, a little dilated at the apex, metatibiae slightly arched, two symmetric tibial spurs long and acute present in pro, meso and meta legs, tarsomeres laterally compressed ( 0.44 mm), fourth bifid, covering the fifth, claws simple.

ABDOMEN. Abdominal sternites with rounded posterior angles, posterior border of the sixth sternite slightly concave right, last sternite with posterior margin slightly emarginated ( Fig. 10B). Ovipositor with stylus elongated, coxites fused to valvifers, coxites slightly longer ( 1.27 mm) than valvifers ( 1.04 mm); valvifers divergent posteriorly; proctiger plate long, well-sclerotized ( Fig. 10D).

Male

MEASUREMENTS. Length of body 13.38 mm; width 6.63 mm.

COLOUR. Body slender; general coloration dark brown, except for sides of pronotum and humeral margin of elytra, which are yellowish ( Fig. 11A). Body with dorsal setae fine, short, pubescence yellowish ( Fig. 11B).

HEAD. Prognathous; interocular space concave, integument brilliant and pilose; interantennal distance ( 0.04 mm) narrower than antennal fossae ( 0.39 mm); eyes finely faceted, semispherical, not prominent, longer ( 0.48 mm) than wide ( 0.30 mm); antennae serrated, long, exceeding beyond posterior coxae, antennomere III longer than antennomere IV; rostrum longer ( 0.81 mm) than wide ( 0.5 mm); labrum semi-square, anterior margin straight; mandibles straight, slender and slightly curved at apex, as long as labrum; last maxillary and labial palpomere long, distally flattened, and more or less dilated.

THORAX. Pronotum wider ( 3.62 mm) than long ( 2.29 mm), subpentagonal, transverse, with roughly dotted surface, anterior margin rounded, lateral margins straight, pronotal margin of 0.54 mm wide, anterior angles slightly prominent, decumbent setae; prosternum strongly carinated; scutellum subquadrangular, longer than wide, with emarginated posterior border; elytra long, slightly dilated at base, three times as long ( 11.09 mm) as wide ( 3.27 mm), surface rugose, opaque; long legs, pro and mesolegs similar to each other, metalegs longer, fusiform femurs, tibia channelled, a little dilated at the apex, metatibiae slightly arched, two symmetric tibial spurs long and acute present in pro, meso and meta legs, tarsomeres laterally compressed, fourth bifid, covering the fifth, claws simple.

ABDOMEN. Abdominal sternites with rounded posterior angles, posterior border of seventh sternite slightly convex ( Fig. 6L), last sternite triangular; aedeagus long, slender, with asymmetrical basal piece ( 0.93 mm) longer than parameres ( 0.46 mm) ( Fig. 11C), with posterior margin slightly concave, parameres concave, apically slightly acute ( Fig. 10E), phallus slender, laterally channelled, median orifice apical, without thorns medially ( Fig. 11C–E).