Plateumaris germari

Members of the genus Plateumaris can be distinguished from related Donaciinae genera by their relatively robust body form and the structure of the antennae. Specific identification of P. germari requires examination of male genitalia and comparison with closely related species in the western North American fauna. The species may be separated from P. shoemakeri and other sympatric Plateumaris by subtle differences in elytral sculpture and coloration, though reliable identification typically requires dissection and reference to taxonomic keys.

Aquatic and semi-aquatic environments including marshes, ponds, lakeshores, and slow-moving streams. Associated with emergent vegetation such as sedges, rushes, and other wetland plants that serve as larval hosts.

Western North America. Documented from Alberta, British Columbia, and Labrador in Canada, with range extending southward through the western United States.

• Plateumaris shoemakeriOverlapping distribution in western North America; requires genitalic examination for reliable separation
• Donacia speciesSympatric aquatic leaf beetles in the same subfamily; Donacia typically has more elongate body form and different antennal structure

• aquatic beetle
• wetland insect
• Chrysomelidae
• Donaciinae
• western North America

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