Tshekardocoleidae

Definition

An extinct family of stem-group beetles (Protocoleoptera) known from the Early Permian (Cisuralian), representing among the earliest definitive beetle lineages. Members are characterized by primitive elytra and were likely xylophagous. The family persisted until the beginning of the Guadalupian; a disputed Jurassic record remains unverified. The genus Coleopsis, originally described within this family, has been reassigned to the separate family Coleopsidae.

Etymology

From Tshekarda, the type locality in Russia, plus -coleidae (beetle family suffix)

Example

Fossil elytra from Tshekardocoleidae preserve venation patterns that help distinguish early beetles from related neuropteroid ancestors, illustrating the gradual evolution of the hardened forewings characteristic of modern Coleoptera.

Related Terms

• Coleopsidae
• Protocoleoptera
• stem group Coleoptera
• Elytra
• Cisuralian
• Xylophagous
• Permian insects
• Coleopsis

Usage Notes

Used in paleoentomology and coleopteran systematics to refer specifically to this Early Permian family, not as a general term for primitive beetles. Distinguish from Coleopsidae, which now houses the oldest known beetle genus Coleopsis. The family's temporal range is strictly Paleozoic; post-Permian records require critical evaluation.