Petrosyne, Ponomarenko, 1969

Yan, Evgeny V., Beutel, Rolf G. & Ponomarenko, Alexander G., 2017, Ademosynidae (Insecta: Coleoptera): A new concept for a coleopteran key taxon and its phylogenetic affinities to the extant suborders, Palaeontologia Electronica 5 (8), pp. 1-22 : 13

Petrosyne : Ponomarenko, 1969, p. 135

Type species. Petrosyne liassica Ponomarenko, 1969 by original designation.

Differential diagnosis. Anterior margin of metanepisterna straight; anterior process of metaventrite elevated.

Revised diagnosis. Medium sized beetles with elongate body. Lateral margins of prosternum curved. Procoxal rests short and narrow. Mesoventral posterior process very narrow. Metaventrite parallel-sided, its posterior angles protruding posterolateraly. Anteromedian process of metaventrite elevated, incised apically. Metacoxae laterally extending to outer margins of metanepisterna. Anterior margin of metanepisterna straight.

Species included. Monotypic.