The Status of Species of Trichostrongylus of Birds

Abstract

Two species of Nematodes belonging to the genus Trichostrongylus, namely, T. tenuis (Mehlis 1846) Railliet and Henry 1909, and T. pergracilis (Cobbold 1873) Railliet and Henry 1909, have been described from birds, the location of both species being the caeca. A third species, described as Strongylus douglasi Cobbold 1882 emend. Gedoelst 1911, from the proventriculus of the ostrich, is considered by some authors as belonging to the genus Trichostrongylus, and by others, notably Lane (1923) and Nagaty (1932), as necessarily referred to a distinct genus, Libyostrongylus, with which latter opinion we are inclined to agree, as a result of examination of specimens of this species.