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Issue: Vol. 7 No. 4: August 2024
Type: Article
Published: 2024-08-30
DOI: 10.11646/palaeoentomology.7.4.11
Page range: 513-528
Abstract views: 167
PDF downloaded: 10

The first dermapterid earwigs from the Lower Cretaceous Yixian Formation of northeastern China (Dermaptera: Dermapteridae)

Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China
Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China; Department of Paleobiology, National Museum of Natural History, Smithsonian Institution, Washington, DC 20013-7012, USA
Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, New York 10024-5192, USA; Facultad de Ciencias Biológicas, Universidad Nacional Mayor de San Marcos, Lima, Perú; Departamento de Entomología, Museo de Historia Natural, Universidad Nacional Mayor de San Marcos, Av. Arenales 1256 Jesús María, Lima 14, Perú
Key Lab of Insect Evolution and Environmental Change, College of Life Sciences, Capital Normal University, 105 Xisanhuanbeilu, Haidian District, Beijing 100048, China
Dermapteridae earwigs new genus new species Dermaptera

Abstract

A new dermapterid genus Grammoderma gen. nov. is described, with four included species—Grammoderma identicum sp. nov., G. uniforme sp. nov., G. kocareki sp. nov., and G. insolitum sp. nov.—all from the Lower Cretaceous, Yixian Formation of Huangbanjigou Village, Liaoning Province, northeastern China. Currently, existing specimens of Dermapteridae are frequently fragmentary although tegmina are well documented for all of the genera, particularly the tegminal venation. The new genus can be distinguished from all other genera based on the tegminal markings and venation, as well as the form of the cerci, where known for other genera. The four new species expand the limited diversity of the family, particularly for the Early Cretaceous where Dermapteridae were formerly known from a single species. In addition, these species also provide additional information for future phylogenetic studies of evolutionary relationships among Dermaptera.

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