Fossil beetle genera

Triamyxa is an extinct genus of myxophagan beetle in the monotypic family Triamyxidae from the Carnian stage of Late Triassic, approximately 230 million years ago. It was found in the Keuper Claystone of Poland. The type species is Triamyxa coprolithica and it was identified from specimens found in the coprolite ZPAL AbIII/3520, likely belonging to the dinosauriform Silesaurus opolensis. Because Triamyxa specimens were found inside coprolites, this may offer a new method of finding insect fossils aside from amber. It is currently the oldest known member of Myxophaga. It was interpreted as

Coleopsis is an extinct genus of stem-group beetles. It contains a single species, Coleopsis archaica, and is the only member of the family Coleopsidae and superfamily Coleopsoidea. It is known from a single specimen from the Early Permian of southwestern Germany, estimated to be about 297 million years old. It is currently the oldest known beetle.

Calicovatellus is an extinct genus of dytiscid beetle in the subfamily Hydroporinae. , only one species is recognized, Calicovatellus petrodytes. It was found in the Barstow Formation in southern California and dates to the Miocene.

Parahygrobia natans is an extinct species of adephagan beetle. It is the only member of the genus Parahygrobia and family Parahygrobiidae. It is known only from larvae from the Late Jurassic of Russia. Cladistic analysis has placed it as the sister group to extant Hygrobiidae.

Procoelambus macrocephalus is an extinct species of beetle in the family Dytiscidae, the only species in the genus Procoelambus.

Cardiosyne is an extinct genus of beetles from the Triassic of Argentina. It was originally tentatively classified in Elateridae, but in 2020 it was transferred to Coleoptera incertae sedis.

Pterolophosoma is an extinct genus of beetle in the family Cerambycidae, containing a single known species, Pterolophosoma otiliae. It was described by Vitali in 2006 who found it in a Dominican amber dating to Early Miocene.

Avitortor is an extinct, fossil genus of hide beetle that lived during the Lower Cretaceous. Avitortor is the only genus of the subfamily Avitortorinae.

Magnocoleus is an extinct genus of beetles from the Early Cretaceous of China, between 130.0 and 125.45 Mya. The genus contains a single species, Magnocoleus huangjiapuensis, and is the only member of the family Magnocoleidae in the suborder Archostemata. Magnocoleus was first described by Chinese palaeoentomologist Hong Youchong in 1998, based on fossils of isolated elytra from the Qingshila Formation in Huangjiapu, near the Nantianmen village of Zhangjiakou in Hebei. Recent phylogenetic analyses have suggested that Magnocoleus is closely related to or placed within either Cupedidae or O

Blapsium is an extinct genus of beetles from the Middle Jurassic of England. The only described species is B. egertoni, which was first described by John O. Westwood in 1854. The species is known from a single specimen found by the Earl of Enniskillen in the Stonesfield Slate, now known as part of the Taynton Limestone Formation, which Sir Philip Egerton then passed to Westwood for description. The specimen is deposited in the Natural History Museum, London. It is incompletely preserved, lacking a head, pronotum and legs. It has a broad, convex body. It has a very short metathorax, which sugge

Mesogyrus is an extinct genus of fossil beetles in the family Gyrinidae, containing the following species:

Aphodiites is a genus of fossil beetles from the Lias (Lower Jurassic) of Schambelen (Aargau, Switzerland), and the oldest fossil in the superfamily Scarabaeoidea. Its affinities are not apparent; it was initially placed in the Aphodiinae (Scarabaeidae), but its diagnostic characters are shared by beetles such as Glaresis (Glaresidae).

Psyllototus is an extinct genus of flea beetles described from the late Eocene Rovno amber of Ukraine, and from the Baltic amber of Russia and Denmark. It was named by Konstantin Nadein and Evgeny Perkovsky in 2010, and the type species is Psyllototus progenitor. In 2016, a newly described extant flea beetle genus from Bolivia, Chanealtica, was found to be most similar to Psyllototus, based on the characters available for observation.

Mirimordella gracilicruralis is a fossil species of beetles in the family Mordellidae, the only species in the genus Mirimordella.