Clypastraea, 2022

Li, Yan-Da, Zhang, Yu-Bo, Szawaryn, Karol, Huang, Di-Ying & Cai, Chen-Yang, 2022, Earliest fossil record of Corylophidae from Burmese amber and phylogeny of Corylophidae (Coleoptera: Coccinelloidea), Arthropod Systematics & amp; Phylogeny 80, pp. 411-422 : 411

Tribe Xenostanini Li, Szawaryn & Cai trib. nov.

Type genus.

Xenostanus gen. nov.

Diagnosis.

Body elongate (oval to circular in most Corylophidae except for Foadiini , Aenigmaticini and Stanini ). Head partially exposed and visible from above (concealed by produced pronotum in Peltinodini , Cleidostethini , Sericoderini , Parmulini , Corylophini , Teplinini and Rypobiini ). Antennae 10-segmented, with 3-segmented club (antennae 8-, 9-, or 11-segmented, or with 5-segmented club in some other tribes). Pronotum widest basally (narrowed posteriorly in Aenigmaticini and some Foadiini ); anterior pronotal margin straight (produced or emarginate in various corylophid groups except for Aenigmaticini and Stanini ). Prosternum in front of coxae as long as procoxal longitudinal diameter (distinctly longer or shorter in various corylophid groups except for Aenigmaticini , Stanini and Cleidostethini ); prosternal carinae absent (present in Periptycinae ). Procoxal cavities externally closed (open in Peltinodini ). Elytra somewhat truncate apically, exposing pygidium (conjointly rounded and concealing all abdominal tergites in many Corylophidae except for Foadiini , Aenigmaticini , Stanini , Sericoderini and some Parmulini ). Transverse mesoventral carina absent (present in Stanini ). Mesocoxal cavities laterally closed (laterally open in Cleidostethini , Orthoperini and Teplinini ). Metaventrite with distinct postcoxal lines (metaventral postcoxal lines absent in most Corylophidae except for Peltinodini and Orthoperini ). Tibiae with two small apical spurs. Abdominal ventrite 1 with strongly arcuate postcoxal lines (abdominal postcoxal lines absent in most Corylophidae except for Foadiini , Peltinodini , and some Corylophini ; such lines straight in Foadiini ).