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The World of Protozoa, Rotifera, Nematoda and Oligochaeta

[ref. ID; 7652 (Khera, 1970)]

Dorygasteridae n. fam.


Dorylaimoidea. Cuticle thick and smooth, subcuticle with minute transverse striae. Amphids stirrup-shaped. Stoma with an axial stylet carrying simple extension. Guiding ring present. Oesophagus with a bulb-like valvular portion at the end of the first part, followed by an isthmus and then a typically dorylaimoid posterior part.


Family Campydoridae (Thorne, 1935) Clark, 1961 is characterzied by the slender anterior part of the oesophagus followed by a swollen, basal bulb-like last fifth, containing a valvular triquetrous chamber. The new genus cannot be accommodated in this family or any other family of Dorylaimoidea because of the presence of a bulb-like valvular portion at the end of the first part of oesophagus and in the presence of a small isthmus immediately following the bulb - hence a new family Dorygateridae to accommodate the new genus. It is interesting to note that families Campydoridae and Dorygasteridae show similar differences in the structure of oesophagus as found in the superfamilies Rhabditoidea (Orley, 1880) Travassos, 1920, Diplogasterioidea (Micoletzky, 1922) Goodey, 1963 - a case of parallel evolution. (ref. ID; 7652)

Type genus

Dorygaster n. g.