The first Eocene tumbling beetle of the genus Isotrilophus (Insecta: Coleoptera: Mordellidae) from the Green River Formation (Colorado, United States)

The first fossil representative of the genus Isotrilophus Liljeblad (Mordellidae), I. rasnitsyni sp. nov., from the Lower Eocene of the Green River Formation (Colorado) is described. The new species differs from its only congener, I. erraticus (Smith, 1883), in the shape of eye, metepisternum, confi...

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Bibliographic Details
Published in:Paleontological journal 2016-11, Vol.50 (6), p.609-611
Main Authors: Odnosum, V. K., Perkovsky, E. E.
Format: Article
Language:English
Subjects:
Coleoptera
Earth and Environmental Science
Earth Sciences
Eocene
Freshwater
Insecta
Mordellidae
Paleontology
Rivers
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Description
Summary:The first fossil representative of the genus Isotrilophus Liljeblad (Mordellidae), I. rasnitsyni sp. nov., from the Lower Eocene of the Green River Formation (Colorado) is described. The new species differs from its only congener, I. erraticus (Smith, 1883), in the shape of eye, metepisternum, configuration of temporal angle, lateral edge of the prothorax, and in the length ratio of the prothorax and elytra. The first I. erraticus south of Nicaragua (e.g., in Costa Rica and Peru) are recorded.
ISSN:0031-0301
1555-6174
DOI:10.1134/S0031030116060113