The ultrastructure of
Proechinophthirus zumpti
Werneck, 1955, mainly the external chorionic features of the egg, is described
through electronic microscopy techniques. This species was first cited in
Argentina, infesting Arctocephalus australis (Zimmermann, 1873). The morphological
adaptations of adults and nymphs are described in both species of
Proechinophthirus
parasitic on Otariidae:
P.
fluctus
(Ferris, 1916) and
P. zumpti
.