Coxelus Dejean, 1821

ALEKSEEV, VITALII, MCKELLAR, RYAN C. & BUKEJS, ANDRIS, 2024, A revision and addition to Zopheridae (Coleoptera: Tenebrionoidea) in Baltic amber: possible connections between modern Holarctic distributions and Eocene ‘ amber forests’, Zootaxa 5536 (2), pp. 201-247 : 207

Genus Coxelus Dejean, 1821

Type species: Bolitophagus pictus Sturm, 1807

Taxonomic assignment. The inclusion under study possesses a combination of characters corresponding to the diverse tribe Synchitini within the subfamily Colydiinae : (1) antennal insertions concealed dorsally; (2) antennae distinctly clubbed, glabrous, lacking scale-like setae; (3) procoxal cavities open posteriorly; (4) all tarsi tetramerous, not dilated; (5) protibiae without apical spurs; and (6) metacoxae separated by triangular process of abdominal ventrite 1. The new extinct species is assigned to the genus Coxelus based on the combination of the following characters: antennae 11-segmented with 2-segmented club; eyes hemispherical; pronotal disc without special sculpture, pronotum narrowed at anterior angles and evenly rounded laterally; short antennal groove present ventrad eye; elytra non carinate; intercoxal process of abdominal ventrite 1 about as wide as metacoxal lenght, and abdominal ventrite 5 without marginal groove; body elongate, and dorsal surface covered with narrow erect setation.