Tshekardocoleidae Temporal range:
| |
---|---|
Fossil and life restoration of Moravocoleus permianus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Coleoptera |
Suborder: | † Protocoleoptera |
Family: | †
Tshekardocoleidae Rohdendorf, 1944 |
Genera | |
See text | |
Synonyms [1] | |
|
Tshekardocoleidae is an extinct family of beetles, known from the Permian. They represent amongst the oldest beetles. Like other primitive beetles, they are thought to have been xylophagous. [2] They first appeared during the Cisuralian, before becoming extinct at the beginning of the Guadalupian. [2] A claimed Jurassic record is doubtful. [1] The oldest known beetle, Coleopsis, was originally assigned to this family, but is now assigned to its own family Coleopsidae. [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 a possible beetle or cockroach. The second species placed in the genus "Uralocoleus" ultimus was rejected from placement in Uralocoleus and listed as "genus incertus" ultimus Ponomarenko, 2000. [1]
Tshekardocoleidae Temporal range:
| |
---|---|
Fossil and life restoration of Moravocoleus permianus | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Arthropoda |
Class: | Insecta |
Order: | Coleoptera |
Suborder: | † Protocoleoptera |
Family: | †
Tshekardocoleidae Rohdendorf, 1944 |
Genera | |
See text | |
Synonyms [1] | |
|
Tshekardocoleidae is an extinct family of beetles, known from the Permian. They represent amongst the oldest beetles. Like other primitive beetles, they are thought to have been xylophagous. [2] They first appeared during the Cisuralian, before becoming extinct at the beginning of the Guadalupian. [2] A claimed Jurassic record is doubtful. [1] The oldest known beetle, Coleopsis, was originally assigned to this family, but is now assigned to its own family Coleopsidae. [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 a possible beetle or cockroach. The second species placed in the genus "Uralocoleus" ultimus was rejected from placement in Uralocoleus and listed as "genus incertus" ultimus Ponomarenko, 2000. [1]