Genus Diplopoma Pfeiffer, 1859

Type species by original designation Diplopoma architectonicum Pfeiffer, 1859.

Description. Medium-sized, high-spired. No modification of the shell for a breathing device. Axial ribs may form prominent fused tufts, spiral threads present or absent. Multispiral operculum with strongly oblique, calcified spiral lamella that is almost reflected over the corneous layer. Opercular lamella with curved smaller lamellae.

Remarks. Diplopoma encompasses a large variety of species distinguished by their opercula and high spires. It is probably polyphyletic. It is very close to Parachondria and the distinction between them may be arbitrary. Species allocated to either Diplopoma or Parachondria need to be restudied. Opercular features may reallocate some species. Diplopoma has also been recorded from Cuba, Hispaniola, and the Lesser Antilles.

Etymology. G. diplo - two + G. - poma, door—double or two-part operculum.