Name Status: Accepted Name. Latest taxonomic scrutiny: Guiry M.D.
There are approximately 5 species in this genus.: N. gracilis · N. pellucida · N. radiatus · N. reticulata · N. senex
There are approximately 24 species in this genus.: C. achromaticum · C. adriaticum · C. archimedes · C. brandti · C. brandtii · C. catenatum · C. citron · C. cnidophorum · C. constrictum · C. faurei · C. geminatum · C. helicoides · C. helix · C. pellucidum · C. platycorne · C. polykrikoides · C. pulchellum · C. pupa · C. rosaceum · C. schuetti · C. schuettii · C. strangulatum · C. vinctum · C. virescens
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