†Tympanotonos margaritaceus grateloupi d'Orbigny 1852 (horn snail)
Gastropoda - Cerithioidea - Potamididae
Alternative combination: Cerithium grateloupi
Belongs to Tympanotonos margaritaceus according to G. Henriques da Silva 1956
Sister taxa: none
Ecology: epifaunal grazer
Distribution: found only at Plantation Santa Joana (Miocene of Sao Tome and Principe)