Breeding Season of Anemina arcaeformis (Bivalvia: Unionidae) in a Small Creek

Abstract

Breeding season of Anemina arcaeformis was studied in a small creek at Osato-cho, in Kumagaya City, Saitama Prefecture, Japan. In September, females began to incubate eggs in their outer gills. Glochidia hatched until the beginning of January, and then females discharged them from late January to April, mainly in March.