Graphoderus occidentalis
Horn, 1883
Graphoderus occidentalis is a predaceous diving beetle in the Dytiscidae. It is found in North America, with records from the western United States, Canada, and a recent record from Mississippi. As a member of the Graphoderus, it is adapted to aquatic environments. The has been the subject of morphological studies examining its antennal .
Pronunciation
How to pronounce Graphoderus occidentalis: //ɡræfɔˈdɛrəs ˌɒksɪˈdɛntælɪs//
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Distribution
North America. Documented from Alberta and British Columbia in Canada, and the western United States. A 2010 record from Mississippi represents a new state record, extending the known eastern range of the .
More Details
Morphological Research
The antennal ultrastructure of G. occidentalis has been studied in detail. The terminal antennal segment bears approximately 50 of nine different types, including six types of uniporous chemosensilla, one type of nonporous mechanosensitive peg, and two types of multiporous pegs. Some sensilla exhibit structural adaptations that may reflect an aquatic or dual aquatic-terrestrial lifestyle.
Sources and further reading
- BugGuide
- Wikipedia
- GBIF taxonomy match
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
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- The fine structure of uniporous and nonporous pegs on the distal antennal segment of the diving beetle Graphoderus occidentalis Horn (Coleoptera: Dytiscidae)