Genus Desmanthus Topsent,1894

Lophacanthus Hentschel, 1912

TYPE SPECIES. — Aciculites incrustans Topsent, 1889 by subsequent designation (Topsent 1894).

DEFINITION. — Desmanthidae with desmas differentiated into two distinct types: basal desmas without unbranched rhabdome (desmas I) and peripherally located rhabdome-bearing desmas (II), rhabdomes pointing outward. Desmas are tetracrepid.