Trigonorhinus riddelliae
Trigonorhinus riddelliae is a of in the . It belongs to the tribe Eugonini, which comprises small to -sized weevils often associated with fungal substrates. The Trigonorhinus is characterized by its distinctive triangular shape. This species is part of a poorly studied group of North anthribids with limited published biological information.
Pronunciation
How to pronounce Trigonorhinus riddelliae: /ˌtraɪɡənoʊˈraɪnəs rɪˈdɛli.aɪ/
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Identification
Trigonorhinus riddelliae can be distinguished from other Trigonorhinus by the combination of: triangular with margins converging strongly toward the ; antennal extending beyond the margin of the ; and specific elytral sculpturing patterns. The species name honors the , suggesting the series was based on specimens from a specific collector's efforts. Close examination of rostral shape and antennal proportions is required for accurate species-level identification within this .
Distribution
United States ( locality and associated collection records)
Similar Taxa
- Trigonorhinus rotundatusShares the triangular characteristic of the but differs in rostral proportions and antennal length relative to position
- Other Eugonini generaSimilar small but distinguished by the unique triangular shape that gives Trigonorhinus its name
More Details
Taxonomic Note
The epithet 'riddelliae' is a Latin genitive form honoring a female , likely Mrs. Riddell or a collector with the surname Riddell. This follows the standard practice in of using genitive case for . The species was described in the 20th century as part of revisions to North , though exact publication details require verification against primary literature.
Data Limitations
This is known from few specimens in museum collections. Published biological data including associations, seasonal activity, and stages are absent from the accessible literature. Most information about the species comes from taxonomic descriptions rather than ecological studies.