Konnov N P, Anisimov P I, Kondrashkina K I, Sinichkina A A, Luk'ianova A D, Demchenko T A
Parazitologiia. 1979 Jan-Feb;13(1):26-8.
The proventriculus of the flea X. cheopis was studied by means of scanning electron microscopy. The external surface of the proventriculus is a rigid structure with an alveolate surface ("wasp nest") formed by muscular cords. The internal surface of the proventriculus is represented by numerous acanthae which fall close together. They have a shape of bent dens with longitudinal sharply angular edges and concave spaces between them. Some edges are crenate.
