Suborder Rhabditina

Rev. 02/26/24

In the classifiaction system of DeLey et al., 2006 and De Ley and Blaxter, 2002, 2004 the suborder Rhabditina comprises 3 infraorders:

Infraorder Diplogasteromorpha

Superfamilies: Diplogastroidea, Cylindrocorporoidea, Odontopharyngoidea

Infraorder Rhabditomorpha

Superfamilies: Strongyloidea, Trichostrongyloidea Molineoidea, Helimosomoiodea, Metastronguloidea, Ancylostomatoidea, Mesorhabditoidea, Rhabditoidea.  The families in these superfamilies (see Rhabditida Menu) are approximately equivalent to the neatodes more classically referred to as the Strongylida.

The "Strongylida" or “bursate nematodes” are a diverse group of parasitic nematodes recognized by the distinctive patterns of rays in the male bursa. The supporting rays of the strogylid bursa are channels through which nerve tissue runs to the sensory papillae at the extremities. Molecular studies have provided support for recognition of the Strongylida as a monophyletic group.  The patterns of rays are used as diagnostic morphological characteristics of species; in may cases the species are difficult to differentiate based on female characteristics.

Bursa of Orloffia orloffi (Sankin, 1930) (Haemonchidae, Ostertagiinae), ventral view. Rays numbered per Chabaud et al (1970): 0, unpaired pre-cloacal papilla; 1, pre-bursal papilla; 2, ventro-ventral ray; 3, ventro-lateral ray; 4, 5, 6, lateral trident of rays composing the lateral trunk; 4, externo- (or antero-) lateral ray; 5, medio-lateral ray; 6, postero-lateral ray; 7, paired papillae on dorsal opening of cloaca; 8, externo-dorsal ray.

Width of bursa approx. 0.5 mm

Adapted from Beveridge et al., 2013

Infraorder Bunanematomorpha

Superfamily Bunonematoides

 

 

Biology and Life Cycles:

 

References:

Beveridge, I., Spratt, D.M., Durette-Desset, M-C. 2013. Order Strongylida (Railliet & Henry, 1913). Handbook Of Zoology Online. De Gruyter

Chabaud, A. G., Puylaert, F., Bain, O., Petter, A. J., Durette-Desset, M.-C. 1970. Remarques sur l’homologie entre les papilles cloacales des Rhabditides et les cotes dorsales des Strongylida. C. R. Hebd. Seances Acad. Sci. 271: 1771-1774.

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