A REVIEW OF THE TAXONOMIC NOMENCLATURE AND A CHECKLIST OF THE SPECIESOF THE BRANCHIOBDELLAE (ANNELIDA, CLITELLATA)

The taxonomic nomenclature of the branchiobdellidans is reviewed. This includes the higher rankings and the numerous generic names assigned during the first half of the 19th century, particularly the use of Bra nchiobdella for species of the marine leech, Branchellion. The current taxonomic situation is summarized to high light where inconsistencies and omissions exist in the data. The class Branchiobdellae consists o f one order, Branchiobdellida, with five families containing a total o f 21 genera and 149 species. The binomia are given with any junior syn onyms, and these are followed by the citation in which the rank was re duced to junior status. In addition, the valid taxon Sinodrilus hetero rchis has been placed in incertae sedis until the entry point of the s perm ducts into the glandular atrium can be determined, two species ar e considered nomen inquirenda and three others nomen nudem.