Ceratophila, a new genus of erotylid beetles (Erotylidae: Pharaxonothinae) inhabiting male cones of the cycad Ceratozamia (Cycadales: Zamiaceae) Author Tang, William Author Skelley, Paul Author Pérez-Farrera, Miguel Angel text Zootaxa 2018 2018-10-31 4508 2 151 178 journal article 28054 10.11646/zootaxa.4508.2.1 da79b654-bd50-4715-8ed3-80fa7a00d469 1175-5326 2606934 5E2BC894-1919-4F63-8EF5-BAAC91913388 Ceratophila ( Ceratophila ) Tang, Skelley & Pérez-Farrera, nominate subgenus Type species. Ceratophila ( Ceratophila ) picipennis , n. sp. , here designated. Adult diagnosis. The subgenus C . ( Ceratophila ) is distinguished from the subgenus C . ( Vovidesa ) by the convex pronotal surface near lateral carina; lateral carina distinctly thicker anteriorly; metatibia triangularly dilated toward apex; and apparently lacking sexual dimorphism. Adult description. Length 3.03–5.11 mm , width 1.26–2.04 mm . Mouthparts: submentum without long erect or reclining setae. Pronotum: nearly quadrate, length/width = 0.78–0.90; anterior margin near eyes weakly emarginate, anterior angles slightly projecting, anterior angles rounded; surface near lateral carinae not explanate, carinae in dorsal view evenly arcuate; in lateral view thickening anteriorly, 2× thicker than posterior edge; pronotal disc lacking longitudinal groove extending anteriorly from lateral basal pore in margin. Elytra: in most populations often laterally with dark coloration that may extend to disc, maculation merges gradually with lighter ground color anteriad and posteriad; lacking visible setae on surface. Legs: protibia with distal lateral tooth strongly developed in both sexes, apex of tooth with cluster of 3 short stout spinules; meso- and metatibiae moderately angularly dilated at apex which is fringed with short stout spinules. Male genitalia: median lobe and tegmen compressed laterally, penile struts 1.15–1.90× longer than median lobe. Sexual dimorphism absent, except in C . ( C .) chemnicki . Remarks . Ceratophila ( Ceratophila ) is notably different from C . ( Vovidesa ) in an apparent lack of external sexual dimorphism (exception, see remarks under C. chemnicki ) and in other noted external characters. Many populations of Ceratozamia appear to have a member of each subgenus on the male cones. The morphological differences between these beetles imply they occupy different niches on the cones, fulfilling different functions.