Sinum planulatum
Illustration of juvenile (7–9) and adult (10–12) S. planulatum from Weinkauff.
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Subclass:	Caenogastropoda
Order:	Littorinimorpha
Family:	Naticidae
Genus:	Sinum
Species:	S. planulatum
Binomial name
Sinum planulatum (Récluz, 1843)
Synonyms[1]
Ectosinum pauloconvexum Iredale, 1931 Ectosinum planulatum (Récluz, 1843) Sigaretus gualtierianus Récluz, 1851 Sigaretus planulatus Récluz, 1843 (original combination) Sinum (Ectosinum) planulatum (Récluz, 1843) accepted - alternate representation Sinum planatum (misspelling)

Sinum planulatum , the flattened ear snail, is a species of sea snail, a marine gastropod mollusk in the family Naticidae, also known as the moon snails.^[1]

The size of the shell varies between 22 and 33 mm (0.87 and 1.30 in).

This section needs expansion. You can help by adding to it. (March 2016)

The marine species occurs off Tanzania and Mozambique.

• Spry J.F. (1961) The sea shells of Dar es Salaam: Gastropods Tanganyika Notes and Records

• Gastropods.com: Sinum planulatum^{[permanent dead link‍]}