Optioservus castanipennis
(Fall, 1925)
Optioservus castanipennis is a of in the , first described by Fall in 1925. It belongs to a of small aquatic inhabiting running water systems. The species is recognized as part of the Nearctic fauna and has been subject to taxonomic revision based on male and elytral characteristics.
Pronunciation
How to pronounce Optioservus castanipennis: //ˌɒpti.oʊˈsɜrvəs ˌkæstənaɪˈpɛnɪs//
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Identification
This can be distinguished from other Nearctic Optioservus based on male and elytral pattern and shape. The 1978 revision of the established these features as more reliable than previously used external characters, which were found to be extremely variable.
Habitat
As a member of , this inhabits aquatic environments with flowing water. are typically associated with streams and rivers where they occupy the hyporheic zone and surface substrates.
Distribution
North America. The is part of the Nearctic fauna.
Similar Taxa
- Optioservus canusBoth are Nearctic Optioservus distinguished by male and elytral patterns
- Optioservus fastiditusAnother Nearctic requiring examination of male for accurate identification
- Optioservus quadrimaculatus Nearctic in the same , separated by elytral pattern and
More Details
Taxonomic history
Originally described in the Heterlimnius, later transferred to Optioservus. The 1978 revision by H. H. established the current and provided diagnostic characters for the .