Ref ID : 1762
A. Coomans and J. Heyns; Oncholaimus sahariensis sp. n. (Nematoda) from the Algerian Sahara. Hydrobiologia 107:193-201, 1983
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Oncholaimus sahariensis sp. n. is described from an oasis in the Algerian Sahara. It differs from O. aquaedulcis Schneider, 1937 and O. deconincki Heyns & Coomans, 1977, the only other freshwater species in the genus, in the more posteriorly situated vulva, the spicules which are longer than in O. deconincki but shorter than in O. aquaedulcis, and various other characteristics. The new species is unusual in that the whole female reproductive system as well as the demanian system are located on the left side of the intestine, whereas the reproductive system is normally to the right in Oncholaimoidea. Problems concerning the validity and differentiation of Oncholaimium Cobb, 1930 are discussed, at the same time explaining why the new species is placed in Oncholaimus rather than in Oncholaimium.