Stream-associated
Guides
Gehringia
Gehringia is a monotypic genus of ground beetles in the family Carabidae, containing the single species Gehringia olympica. The genus was established by Philip Jackson Darlington, Jr. in 1933, named in honor of physician John George Gehring. Its sole species is a tiny, shiny-black beetle with distinctive stout bristles, restricted to the Pacific Northwest of North America.
Hesperinus
Hesperinus is the sole genus in the relict family Hesperinidae, a small group of nematoceran flies in the infraorder Bibionomorpha. The genus contains approximately 8 extant species distributed primarily across the Palaearctic region, with single species in the Nearctic and Neotropical regions. Three fossil species have been described from Eocene Baltic amber. The family represents a phylogenetically isolated lineage with limited ecological and biological documentation.