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A new genus and two species of the subfamily Orthocladiinae are described from western North America. Oropuella gen. n. shows affinities to Parametriocnemus Goetghebuer and Paraphaenocladius Thienemann, but can be distinguished by morphology for all life stages. Two novel species are placed in the new genus, Oropuella eidolon sp. n and Oropuella pallida sp. n. Amendments to current genus keys are given to incorporate the new genus, and the current state of Orthocladiinae species taxonomy in the western Nearctic is discussed.
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Andrew Fasbender (2020) studied this question.
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