Tshekardocoleidae

[1] The Tshekardocoleidae are thought to have retained several plesiomorphies (ancestral characters) of Coleoptera in a broad sense.

For instance, their elytra are flattened, lack epipleura (outer margins), cover the body loosely, and their tips extend beyond the apex of the abdomen.

Their abdomens have a nearly cylindrical shape and are thought to have been flexible, apparently being able to strongly contract and expand.

In extant beetles, the elytra are tight-fitting, forming a subelytral space which is absent in Tshekardocoleidae.

[3] Kirejtshuk (2020) included the following genera in Tshekardocoleidae[1] The genus Uralocoleus had been placed in the family by some authors, but the type species Uralocoleus splendens Zalessky 1947 was considered incertae sedis by Kirejtshuk (2020), as the type specimen is in bad condition and cannot be reliably compared with other members of the family, and the second species placed in the genus "Uralocoleus" ultimus was rejected from placement in Uralocoleus and listed as "genus incertus" ultimus Ponomarenko, 2000, because it was based on an isolated elytron that could either belong to a beetle or a cockroach.

undescribed Tshekardocoleid larvae, Tshekarda site