Protodiplatyidae

Definition

An extinct family of basal earwigs (Dermaptera) in the suborder Archidermaptera, known from Jurassic and Early Cretaceous compression fossils. Diagnostic features include unsegmented, forceps-like cerci and tarsi with four to five segments—plesiomorphic traits distinguishing them from modern earwig families with segmented cerci and three-segmented tarsi. Protodiplatyidae represents one of three families in Archidermaptera, alongside Dermapteridae and Turanoviidae.

Etymology

From Greek protos (first, primitive) + Diplatyidae (a family of modern earwigs, from Greek diploos double + latys broad, referring to the forceps), with the family suffix -idae.

Example

Fossils of Protodiplatyidae from the Middle Jurassic Daohugou beds of China preserve detailed wing venation and unsegmented cerci, providing key evidence for the transition from primitive to modern dermapteran body plans.

Related Terms

• Archidermaptera
• Dermaptera
• Dermapteridae
• Turanoviidae
• cercus
• Tarsus
• Plesiomorphy
• compression fossil
• earwig

Usage Notes

Protodiplatyidae is strictly fossil; no extant representatives are known. The family is distinguished from Dermapteridae (also extinct, but with different wing characters) and Turanoviidae by tarsal segmentation and cercal structure. Some classifications merge or synonymize these archidermapteran families; current usage follows Martynov's 1925 establishment. The name is sometimes misspelled 'Protodiplatyidae' in older literature; the stem is Protodiplatys-.