Diomus roseicollis
(Mulsant, 1853)
Diomus roseicollis is a small lady beetle first described by Mulsant in 1853. Originally placed in the Scymnus, it was later transferred to Diomus. The species occurs across North America and has been recorded from several departments in Colombia, indicating a broader Neotropical distribution than initially recognized.
Pronunciation
How to pronounce Diomus roseicollis: /ˈdaɪəməs roʊziˈkɒlɪs/
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Identification
Members of Diomus are generally small, elongate-oval lady beetles, often less than 3 mm in length. D. roseicollis can be distinguished from other Diomus by the rose-colored (pinkish) pronotum suggested by its specific epithet. Exact diagnostic features require examination of genitalia and other microscopic characters.
Images
Distribution
Documented from North America (conterminous 48 United States) and Colombia (departments of Antioquia, Cundinamarca, Huila, and Valle del Cauca).
Similar Taxa
- Diomus terminatusSimilar small size and elongate body form; requires microscopic examination to separate.
- Other Scymnini genera (e.g., Scymnus, Nephus)Convergent small size and body shape in this tribe of Coccinellidae; genitalia and other fine characters needed for definitive identification.