Studies on Oemopteryx vanduzeea (Claassen, 1937) and a new species in the O. vanduzeea species group (Plecoptera: Taeniopterygidae) from the Pacific Northwest, USA

This is the authors' abstract. We don't add key points for this paper.

The Holarctic genus Oemopteryx is represented in the Nearctic region by three species groups, including the far western O. vanduzeea group. In this paper, we redescribe and illustrate O. vanduzeea (Claassen, 1937) and describe O. leei sp. n. from California and Oregon, USA. The new species is distinguished in the male from O. vanduzeea by the epiproct complex having a tongue-shaped prong that is hood-like at the apex, by the sleeve containing a filament that bears a terminal hook, and by a ventral, elongate, finger-like process that inserts into the apex of the prong. The female of O. leei sp. n. exhibits a large, wide subgenital plate that terminates in a narrow notched apex, whereas the subgenital plate is smaller and trapezoidal, with a flat, truncate margin in O. vanduzeea.