Rhodotritoma Arrow, 1925

Xu, Huixin, Pang, Jiaxin, Li, Jing & Cheng, Zhiqiang, 2022, A newly-recorded species of the genus Rhodotritoma Arrow, 1925 (Coleoptera, Erotylidae) from China, Biodiversity Data Journal 10, pp. 96740-96740 : 96740

Rhodotritoma Arrow, 1925

Rhodotritoma Arrow, 1925 - Arrow 1925: 115. Type-species: Triplax coccinea Crotch, 1876.

Diagnosis

Parts of the following characters combined the features from Arrow (1925) and Chûjô (1969).

Body oval, dorsally convex in lateral view. Head with a pair of stridulatory files on occipital region, both sides with ridge processes, anterior part of frons shallowly impressed at each side. Clypeus with anterior border feebly emarginate. Antennae slender, antennomere Ⅱ short, antennomere Ⅲ more than twice as long as wide, antennomeres Ⅵ-Ⅷ slender, antennal club composed of last three antennomeres loosely articulated. Eyes small, finely faceted, interocular distance wide. Terminal maxillary palpomere more than three times as wide as long. Ligula narrow, the middle of front margin slightly emarginated. Labial palpus short, with the terminal palpomere semi-circular. Mentum slightly longer than width. Anterior margin of pronotum with translucent membranous areas, lateral and basal margins with narrow and complete marginal border. Well-marked punctations on anterior and posterior angles. Prosternum flat, narrowed between procoxal cavities, then broadening behind the coxa. Metaventrite process narrow. All the coxal lines absent.

Compared to female, male has longer antennae, stronger legs and wider tarsi. In some species, inner edge of the male femur has two small rows of nodules or odontoid processes.