Taxonomic Status of Berntsenus brachycephalus (Nematoda: Aphelenchina)

摘要

Berntsenus brachycephalus is redescribed from original material collected by Thorne in Utah, and hololectotype and paralectotypes are designated. This species is characterized by an expanded lip region, offset head, heavily sclerotized stylet conus, and two rows of oogonia and spermatogonia. The hololectotype male is 720 µm long, and paralectotype males are 864 to 952 µm long. Paralectotype females are 840 µm long. Tails of both sexes are amucronate.