Contributions towards a review of the genus Rhynchelmis Hoffmeister (Clitellata: Lumbriculidae) Author Fend, Steven V. Author Brinkhurst, Ralph O. text Zootaxa 2010 2407 1 27 journal article 10.5281/zenodo.194252 d1e5b589-21c5-43a0-b1fc-3c618b0158aa 1175-5326 194252 Rhynchelmis Hoffmeister, 1843 Type species: R. limosella Hoffmeister, 1843 Apomorphies: first spermathecae in segment before GI (VIII); atria long and tubular; anterior testes (GI) reduced or absent; anterior vasa deferentia reduced, non functional or absent; posterior vasa without posterior loop; filiform proboscis; nephridia with dorsal loop and absent on 6/7. Spermathecae connected to gut in most species; if not, then elongated with sperm concentrated in ectal part. Branched lateral blood vessels usually present in middle and posterior segments (absent or reduced in some hyporheic or upland species).