Abstract
The structure of the stoma of Brumptaemilius gabonensis Adamson, 1983 (Ransomnematinae; Nematoda), a parasite of the diplopod Pachybolus sp. in Gabon, is described with the aid of the scanning electron microscope. Three trifid teeth (one dorsal and two subventral) are present at the base of the buccal cavity (telostome), and in line with each and slightly anterior in the buccal cavity is a prominent lanceolate cuticular projection with fringed outer edges and lamellar and hair-like modifications on its inner surface. These projections partially occlude the buccal cavity and may function as filters to food particles. They are characteristic of the Ransomnematinae and the extent of their development varies with the genus, sex and/or developmental stage of the worm. Sexual dimorphism in these structures may lessen competition between the sexes for the food
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