Journal
PALEONTOLOGICAL JOURNAL
Volume 43, Issue 6, Pages 652-659Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S0031030109060082
Keywords
China; Coleoptera; Jurassic; new genus
Categories
Funding
- Ministry of Science and Technology of China [2006CB806400]
- National Natural Science Foundation of China [40872015, 40523004, 40632010]
- Russian Foundation for Basic Research [07-0492105-GFEN-a]
- Presidium, Russian Academy of Sciences
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Daohugounectes primitivus, a new genus and species of coptoclavid beetles, is described from 67 fossil larvae from the Jurassic locality of Daohugou, northeastern China. It differs from other coptoclavids in the combination of the following characters: lateral lobes of nasale present; legs relatively short, with tarsi flat and slightly dilated; abdominal tergite VIII almost circular; derivative of abdominal segment IX present; urogomphi short; and helical thickening of tracheae weak. Most of these features are plesiomorphic for the family Coptoclavidae and the superfamily Dytiscoidea. Among dytiscoids, a derivative of abdominal segment IX is present only in the larvae of the recently discovered relic family Aspidytidae.
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