First Record of Zodariellum planum (Araneae: Zodariidae) from Japan, with the First Description of the Female

Zodariellum planum (Zhang and Zhang, 2019) (Araneae: Zodariidae), originally described from Shaanxi, central China, is newly recorded from western Honshu, Japan, on the basis of specimens collected in a vineyard. Conspecificity between males and a previously unknown female is supported by identical partial mitochondrial cytochrome c oxidase subunit I sequences. The present paper provides photographs and illustrations of both sexes, detailed description and diagnosis of the female, DNA barcode data and a distribution map. In Japan, this species is currently known only from a single vineyard population, and its occurrence there may suggest a possible introduction, although this requires further investigation.