J. Eggers collected a Diplasiolejeunea in Costa Rica with peculiar lobe dentition, described here, as Diplasiolejeunea eggersii, new to science. The main differences from the related Diplasiolejeunea pluridentata and D. papilionacea are given. Because the latter species, from Venezuela, had only a very short protologue, an additional description is given here, based mainly on specimens collected from near the type locality.