Optioservus quadrimaculatus

(Horn, 1870)

four-spotted riffle beetle

Optioservus quadrimaculatus is a of riffle beetle in the Elmidae, described by Horn in 1870. The species is found in North America, with records from Canadian provinces including Alberta, British Columbia, and Saskatchewan. Riffle beetles in this family are aquatic insects associated with running water . The specific epithet "quadrimaculatus" refers to four spots, likely describing a distinctive elytral pattern.

Pronunciation

How to pronounce Optioservus quadrimaculatus: /ˈɑp.ti.oʊˌsɜr.vəs ˌkwɑː.drɪˌmæk.jəˈleɪ.təs/

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Habitat

Aquatic , specifically riffles and running water environments. Members of the Elmidae are typically found in well-oxygenated streams and rivers.

Distribution

North America. Recorded from Alberta, British Columbia, and Saskatchewan in Canada.

More Details

Taxonomic Status

The Catalogue of Life lists Optioservus quadrimaculatus as a synonym of Heterlimnius quadrimaculatus (Horn, 1870), while GBIF accepts it as a valid under Optioservus. This taxonomic uncertainty reflects ongoing revisions in the Elmini tribe.

Etymology

The specific epithet "quadrimaculatus" derives from Latin "quadri-" (four) and "maculatus" (spotted), referring to the four-spotted pattern on the characteristic of this .