CLASSIFICATION OF
RHABDITIDA: CEPHALOBINA





SUPERFAMILY CEPHALOBOIDEA Filipjev, 1934

        Stoma distinctly jointed; cheilorhabdion wide, rest of stoma narrower.  Esophagus with cylindrical procorpus, isthmus barely seen, basal bulb with a valve. Female gonad prodelphic, reflexed down body, usually with an additional double flexure towards the end of the ovary.

Family Metacrobelidae Andrassy, 1974
                    Vulva close to anus.
                                      Genus: Meacrobeles Loof, 1962
Family Cephalobidae Filpijev, 1934
                     Vulva far from anus.
       Subfamily Cephalobinae: Only cheilorhabdions wider than other parts.
                                     Genera: Cephalobus Bastian, 1865
                                                 Eucephalobus Steiner, 1936
                                                 Heterocephalobus (Brzeski, 1960) Brzeski, 1961
                                                Teratolobus Andrassy, 1968
      Subfamily Acrobelinae Thorne, 1937: Cephalic probolae shorter than labial probolae
                                    Genera: Acrobeloides Cobb, 1924) Thorne, 1937
                                                Pseudacrobeles Steiner, 1938
                                                Placodera Thorne, 1937
                                                Chiloblacus Thorne, 1937
                                                Cervidellus Thorne, 1937
                                                Acrobelophis Andrassy, 1984
                                   (Combined from Acrobeles soosi Andrassy, 1953)
                                                Ypsilonellus Andrassy, 1984
                                   (Combimed from Cephalobus vexilliger De Man, 1880)
                                                Stegelleta Thorne, 1938
                                         Syn. Stegella Thorne, 1937
                                                Stegelletina Andrassy, 1984
                                    (Combined from Acrobeles lineatus Thorne, 1925)
                                                Zeldia Thorne, 1937
                                                Scottnema Timm, 1971
                                                Paracrobeles Heyns, 1968
                                                Nothacrobeles Allen & Noffsinger, 1971
                                                Acrobeles Linstow, 1877
           Subfamily Kirjanoviinae Andrassy, 1976: Cephalic probolae large, paddle-shaped, longer
                                                than labial probolae.
                                     Genera: Kirjanovia Ivanova, 1969
                                                 Acromoldavicus Nesterov, 1970
           Subfamily Panagrocephalinae Andrassy, 1976: Cheilo- and protostom wider and  the wall
                                                 more cuticularized than other parts.
                                      Genus: Panagrocephalus Andrassy, 1967

SUPERFAMILY PANAGROLAIMOIDEA Thorne, 1937

Anterior part of stoma wider than posterior one.
Posterior part of gonad straight.

Family Alirhabditidae Suryawanshi, 1971

Mouth cavity tubular, long and narow, not jointed.
           Subfamily Alirhabditinae Suryawanshi, 1971
                                      Genus: Alirhabditis Shuryawanshi, 1971
Family Brevibuccidae Paramonov, 1956
Stoma large, twice as long as wide. Vulva near anus
           Subfamily Brevibuccinae
                                    Genera: Plectonchus Fuchs, 1930
                                               Brevibucca Goodey, 1935
                                               Cuticonema Sanwal, 1959

 Family Panagrolaimidae Thorne, 1937

Stoma wide, cuticularized portion as long as wide. Vulvar about 2/3 of body.
Gonad with postvulvar portion.

           Subfamily Panagrolaiminae Thorne, 1937
                                  Genera: Procephalobus Steiner, 1934
                                              Panagrolaimus Fuchs, 1930
                                              Panagrobellus Thorne, 1939
                                              Panagrobelium Andrassy, 1984
                               (combined from Panagrobelus topayi Andrassy, 1960)
          Subfamily Panagrellinae Andrassy, 1976
                                  Genera: Panagrellus Thorne, 1938
                                             Anguilluloides Rhum, 1956
          Subfamily Turbatricinae Goodey, 1943
                                   Genus: Turbatrix Peters, 1927
          Subfamily Tricephalobinae Andrassy, 1976
                                 Genera: Tricephalobus Steiner, 1936
                                             Halicephalobus Timm, 1956

SUPERFAMILY MYOLAIMOIDEA Andrassy, 1984

Stoma wide short.  Esophagus cephaloboid. Gonad posterior to vulva not reflexed
twice. Bursa present with large ribs. Spicule absent.
Family Myolaimidae Andrassy, 1958
           Subfamily Myolaiminae
                                 Genus: Myolaimus Cobb, 1920

SUPERFAMILY ELAPHONEMATOIDEA Heyns, 1962

Head not symmetrical. Mouth ventrally directed, border laterally by membranous fins, dorsally by truncate appendage. Stoma narrow. Esophagus cephaloboid. Gonad posterior to vulva
not reflect twice.

Family Elaphonematidae Heyns, 1962
           Subfamily Elaphonematinae Heyns, 1962
                                 Genus: Elaphonema Heyns, 1962

SUPERFAMILY DRILONEMATOIDEA Pierantoni, 1916

Esophagus cylindrical.

Family Drilonematidae Pierantoni, 1916 or Family Osstellidae Heyns, 1962
          Subfamily Drilocephalobinae Ali, Suryawanshi & Chisti, 1973
                                  Genus: Drilocephalobus Coomans & Goodey, 1965
          Subfamily Osstellinae Heyns, 1962
                                  Genus: Osstella Heyns, 1962

 SUPERFAMILY TERATOCEPHALOIDEAAndrassy, 1958

Head with separate lips. Lip with strongly cuticularized edges with or without thin setae.

Family Teratocephalidae Andrassy, 1958
               Subfamily Teratocephalinae Andrassy, 1958: Ovary one
                                         Genera: Teratocephalus De Man, 1876
                                                     Steratocephalus Andrassy, 1984
                Subfamily Metateratocephalinae Eroshenko, 1973: Ovary two.
                                         Genera: Metateratocephalus Eroshenko, 1973
                                                     Euteratocephalus Andrassy, 1958

SUPERFAMILY CHAMBERSIELLOIDEA Thorne, 1937

Head with 6 simple or cirrated appendages. Stoma wide. Amphid oval. Corpus of
esophagus well separate from isthmus.

Family Chambersiellidae Thorne, 1937
                 Subfamily Macrolaiminae Sanwal, 1971
                                        Genera: Macrolaimellus Andrassy, 1966
                                                    Macrolaimus Maupas, 1900
                                                    Diastolaimus Rahm, 1928
                Subfamily Chambersiellinae Thorne, 1937
                                        Genera: Cornilaimus Truskova & Eroshenko, 1977
                                                    Geraldius Sanwal, 1971
                                                    Chambersiella Cobb, 1920
                 Subfamily Bicirronematinae Andrassy, 1978
                                          Genus: Bicirronema Andrassy, 1958
 



 Updated 14 February 2003

Constructed and maintained by Khuong B. Nguyen University of Florida