STUDIES ON THE AQUATIC OLIGOCHAETA OF CHINA Ⅳ. DIAGNOSES OF NEW RECORDS AND RARE SPECIES OF NAIDIDAE AND TLJBIFICIDAE

Altogether 9 species belonging to Naididae and Tubificidae are diagnostic. Among them,Branchiodrilus semperi. Dero trifida,Pristina synclites,Ilyodrilus templetoni,Aulodrilus americanus and Telmatodrilus vejdovskyi are recorded from China for the first time. The former subspecies Pristina amphibiotica changtuensis is regarded as a separate species,i. e. Pristinella changtuensis. Descriptions of two forms,Pristinella changtuensis and Telmatodrilus vejdovskyi,are given as follows.