Literature
  • 1966
  • Taxonomical studies on the Tubificidae (Annelida, Oligochaeta), supplement. Internationale Revue der gesamten Hydrobiologie 51(5): 727-742.
  • 1963
  • Taxonomical studies on the Tubificidae (Annelida, Oligochaeta). Internationale Revue der gesamten Hydrobiologie, Systematische Beihefte 2: 1-89.
  • Rouse, Fauchald 1995
  • The articulation of annelids. Zoologica Scripta 24(4): 269-301.
  • 1919
  • The branchiobdellid worms in the collections of the United States National Museum, with descriptions of new genera and new species. Proceedings of the United States National Museum 55(2267): 241-265.
  • Goodnight 1940
  • The Branchiobdellidae (Oligochaeta) of North American crayfishes. Illinois Biological Monographs 17(3): 3-75.
  • 1967
  • The crayfishes and their epizoötic ostracod and branchiobdellid associates of the Mountain Lake, Virginia, region. Proceedings of the United States National Museum 123(3602): 1-84.
  • 1980
  • The earthworm family Sparganophilidae (Annelida, Oligochaeta) in North America. Megadrilogica 3(12): 189-204.
  • 1977
  • The earthworms (Lumbricidae and Sparganophilidae) of Ontario. The Royal Ontario Museum, Toronto. 141 p.
  • , 1959
  • The Enchytraeidae critical revision and taxonomy of European species. Natura Jutlandica 8-9. 160 p.
  • , 1961
  • The Enchytraeidae critical revision and taxonomy of European species. Supplement 1. In: Natura Jutlandica 10. 23 p.
  • 1968
  • The genera of the family Lumbriculidae and the genus Dorydrilus (Annelida, Oligochaeta). Journal of Zoologie, London 156: 273-289.
  • 1985
  • The generic and subfamilial classification of the Naididae (Annelida: Oligochaeta). Proceedings of the Biological Society of Washington 98(2): 470-475.
  • Purschke 2000
  • The phylogenetic position of the Clitellata and the Echiura - on the problematic assessment of absent characters. Journal of Zoological Systematics and Evolution Research 38: 165-173.
  • Fauchald 1977
  • The polychaete worms: Definitions and keys to the orders, families and genera. Natural History Museum of Los Angeles County, Science Series 28: 1-188.
  • 1965
  • The systematic position of the Branchiobdellidae (Annelida: Clitellata). Systematic Zoology 14(1): 25-32.
  • Erséus 1992
  • The taxonomy of Spiridion Knöllner (Oligochaeta, Tubificidae), with a redescription of Spiridion phreaticola (Juget, 1987) comb. n. Stygologia 7(2): 77-83.
  • Healy 1979
  • Three new species of Enchytraeidae (Oligochaeta) from Ireland. Zoological Journal of the Linnean Society 67(2): 87-95.
  • Dumnicka 1983
  • Tubificidae (Oligochaeta) from subterranean waters, with description of two new genera. Bijdragen tot de Dierkunde 53(2): 255-261.
  • Lastochkin 1935a
  • Two new river Aeolosomatidae (Oligochaeta limicola). Annals and Magazine of Natural History (10)15(90): 636-645.
  • 1967
  • Two new species of the family Tubificidae from the Black Sea, with remarks about various species of the subfamily Tubificinae. Publications de la Faculté des Sciences de l'Université J.E. Purkyne, Brno 485: 331-356.