Desmopachria convexa

(Aubé, 1838)

Desmopachria convexa is a of predaceous diving beetle in the Dytiscidae, first described by Aubé in 1838. It belongs to the Hydroporinae and tribe Hyphydrini. The species has a broad distribution spanning North and South America. Like other members of the Desmopachria, it is adapted to aquatic and exhibits the compact, convex body form characteristic of this group of small diving beetles.

Desmopachria (10.3897-zookeys.923.47104) Figures 1–10 by Miller KB (2020) Two new species of Desmopachria Babington, 1841 in the D. convexa species group (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Hyphydrini). ZooKeys 923: 65-77. https://doi.org/10.3897/zookeys.923.47104. Used under a CC BY 4.0 license.

Desmopachria (10.3897-zookeys.923.47104) Figures 37–57 by Miller KB (2020) Two new species of Desmopachria Babington, 1841 in the D. convexa species group (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Hyphydrini). ZooKeys 923: 65-77. https://doi.org/10.3897/zookeys.923.47104. Used under a CC BY 4.0 license.

Desmopachria (10.3897-zookeys.923.47104) Figures 11–36 by Miller KB (2020) Two new species of Desmopachria Babington, 1841 in the D. convexa species group (Coleoptera, Adephaga, Dytiscidae, Hydroporinae, Hyphydrini). ZooKeys 923: 65-77. https://doi.org/10.3897/zookeys.923.47104. Used under a CC BY 4.0 license.

Pronunciation

How to pronounce Desmopachria convexa: /dɛsmoʊˈpækria kənˈvɛksa/

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Identification

The specific epithet 'convexa' refers to the convex body shape typical of this . As a member of Desmopachria, it can be distinguished from other small dytiscid by its compact, rounded body form and reduced elytral striation. Species-level identification within Desmopachria requires examination of male genitalia and other fine structural details; the convex body profile and overall proportions are consistent with the species name.

Images

Distribution

North America and South America. Records indicate presence in both continents, though specific country-level distributions are not detailed in available sources.

Similar Taxa

Other Desmopachria speciesCongeneric share the compact, convex body form and aquatic habits; require examination of male genitalia and subtle structural differences for definitive separation.
Small Hydroporinae genera (e.g., Hyphydrus, Allodessus)Similar size and general body plan, but Desmopachria is distinguished by its more strongly convex profile and reduced elytral .

More Details

Taxonomic history

Originally described by Aubé in 1838, this has maintained stable . The Desmopachria currently contains approximately 70 described species distributed primarily in the New World tropics and subtropics, with some species extending into temperate North America.

Phylogenetic placement

Molecular and morphological studies place Desmopachria within the tribe Hyphydrini of Hydroporinae, a diverse group of small diving beetles characterized by reduced wing venation and simplified male genitalia structures compared to more basal Dytiscidae.