Thericium Monterosato, 1890

Sacchetti, Claudia, Landau, Bernard & Ávila, Sérgio P., 2023, The Lower Pliocene marine gastropods of Santa Maria Island, Azores: Taxonomy and palaeobiogeographic implications, Zootaxa 5295 (1), pp. 1-150 : 28

Genus Thericium Monterosato, 1890

Type species. Cerithium vulgatum Bruguière, 1792 , by original designation ( Monterosato 1890: 163). Present-day, Mediterranean.

Note. Most authors have placed these Atlantic cerithiid species in the genus Cerithium Bruguière, 1789 . Landau et al. (2004a: 5) argued that true Cerithium (sensu stricto) was an Indo-Pacific genus, characterised by a flaring outer lip with a tooth-like extension abapically projecting over the anterior siphonal canal, and a relatively longer siphonal canal. We follow those authors in using Thericium Monterosato, 1890 , at full genus level.