Allonais inaequalis (Annelida: Oligochaeta: Tubificidae) in North America

摘要

The oligochaete Allonais inaequalis (Stephenson, 1911), previously thought to be unknown in North America, was found in the effluent of a sewage treatment plant in New Jersey and recently in the Greater Miami River in Ohio. It is redescribed from this material and compared to the other two species, A. paraguayensis (Michaelsen, 1905) and A. pectinata (Stephen-son, 1910) reported from North America. Identifications of specimens collected from North America, previously thought to be A. paraguayensis, were determined to be incorrect; thus, this species is not yet known to occur in North America. Nais magnaseta Harman, 1973, which closely resembles A. pectinata, also is discussed.