Malacology is the study of mollusks. This includes animals like octopus, snails, slugs, and clams. It is the second largest phylum of animals, making them one of the most successful groups on the planet. There are over 80,000 described species of mollusks with many more left to be discovered. Mullusca is composed of 8 recognized classes including Cephalopoda, Gastropoda, Polyplacophora, Scaphapoda, Monoplacophorans, the Aplacophorans, Caudofoveata and Solenogastres, and Bivalvia.
Emperor Helmet Snail
ANSP 243787, ANSP 407570
Maximum length (mm): 409
The is a large shell that has a very reduced spire and an enlarged body whorl. This shell typically has three rows of blunt knobs and smaller lines of spiral folds. It has an elongated aperture with folds on both sides of the inner aperture. A dark brown stain will develop between the folds of the inner aperture. Adults develop a thick flattened lip. This shell can vary in color from white to tan and sometimes has brown markings and blotches.
North Carolina to Barbados
3 to 183 meters
Carnivore; They feed on a variety seaurchins.
Marine; Soft substrate and among seagrass
This is the largest helmet shell found on the east coast of the United States. This shell is also sometimes called Clench's Helmet.
MolluscaBase eds. (2021). MolluscaBase. Cassis madagascariensis Lamarck, 1822. Accessed through: World Register of Marine Species at: https://www.marinespecies.org/aphia.php?p=taxdetails&id=419778 on 2021-06-23
Rosenberg, G., F. Moretzsohn, and E. F. Garc�a. 29. Gastropoda (Mollusca) of the Gulf of Mexico, Pp. 579�699 in Felder, D.L. and D.K. Camp (eds.), Gulf of Mexico�Origins, Waters, and Biota. Biodiversity. Texas A&M University Press, College Station, Texas.
Morris, P. A. (1987). A field guide to shells: Atlantic and Gulf coasts and the West Indies (3rd ed.). Houghton Mifflin.
Rosenberg, G. 2009. Malacolog 4.1.1: A Database of Western Atlantic Marine Mollusca. [WWW database (version 4.1.1)] URL http://www.malacolog.org/