Lycomesus Zaragoza-Caballero & González-Ramírez, 2019

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 : 222-223

Genus Lycomesus Zaragoza-Caballero & González-Ramírez, 2019

Figs 7E, 9A

Lycomesus Zaragoza-Caballero & González-Ramírez, 2019: 99 .

Type species

Lycomesus llorentei Zaragoza-Caballero & González-Ramírez, 2019 .

Diagnosis

Lycomesus shares similarities with Lyconotus , but it differs in the shape of the anterior margin of the labrum, which is truncated; the presence of a radiomedial loop with sharp edges; the structure of the aedeagus, with parameres that are short and rounded, last abdominal sternite and phallus are characterised by an angled curvature measuring 45°, as well as the lack of thorns on the phallus. Additionally, the phallus is not modified for the reception of the parameres ( Fig. 7E).

Material examined

Refer to Supp. file 1.

Redescription

Body slender. Head concealed by pronotum, rostrum long and slightly widened. Interantennal distance less than 0.09 mm. Antennomere III almost as long as antennomere IV. Labrum semi-square. Mandibles longer than labrum. Pronotum widest at base, with anterior border rounded and anterior margins not prominent, pronotal margin less than 0.52 mm in wide. Elytra with three distinct costae on each elytron ( Fig. 9A). Radiomedial loop angle on wing sharp. Trochanters with acute internal angle, metatibial spurs equal and short. Last sternite partially curved. Male genitalia with short, rounded parameres, phallus laterally compressed, slightly widened, and curved at apex (curvature of about 45°), phallus without thorns ( Fig. 7E).

Distribution

Lycomesus has only been reported from the type locality in Mexico (Nearctic region) ( Zaragoza-Caballero & González-Ramírez 2019).