Two New Species of Fridericia (Enchytraeidae, Oligochaeta) from Changbaishan Mountain, Jilin Province, China

Abstract

Two new enchytraeids from Changbaishan Mountain in north-eastern China are described. Both species lack lateral setae. Fridericia unisetosa sp. nov. is diagnosed by the absence of spermathecal diverticula and clitellar gland cells dorsally, while Fridericia paraunisetosa sp. nov. is characterized by having 6-8 sessile spermathecal diverticula and dorsal pores from XIII. The only other Fridericia species known to lack lateral setae entirely, the North American F. silvestris (Leidy, 1882), differs in having a longer body and more setae in each ventral bundle.