NMITA: Neogene Marine Biota of Tropical America

Sincola Olsson and Harbison, 1953

IV. Subgenus Dorsina Jung, 1989.

Morphologic Description: protoconch 2 1/2 to 3 1/2 volutions; outer lip protoconch sigmoid or sinusigerous; sculpture on early teleoconch absent; sculpture on late teleoconch absent; dorsal hump weak to prominent; hump to the left of aperture well developed; posterior canal weak; thickness outer lip moderate; outer lip slightly extended adapically; small angle between axis of columella and main shell axis.


Return to taxonomic listing of subgenera for Sincola.