Achatinidae is a family of medium to large sized tropical land snails, terrestrial pulmonate gastropod mollusks from Africa.
The aperture is an opening in certain kinds of mollusc shells: it is the main opening of the shell, where the head-foot part of the body of the animal emerges for locomotion, feeding, etc.
Bulimulus is a genus of small to medium-sized tropical or sub-tropical, air-breathing land snails, pulmonate gastropod mollusks in the subfamily Bulimulinae within the family Bulimulidae.
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs. Unlike most molluscs, the blood of ram's horn snails contains iron-based hemoglobin instead of copper-based hemocyanin. As a result, planorbids are able to breathe oxygen more efficiently than other molluscs. The presence of hemoglobin gives the body a reddish colour. This is especially apparent in albino animals.
Dentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.
Cadulus is a large genus of small tusk shells in the family Gadilidae. It contains over fifty-one described species.
Diplommatina is a genus of land snails with an operculum, terrestrial gastropod mollusks in the family Diplommatinidae.
Tornidae is a family of very small and minute sea snails with an operculum, marine gastropod mollusks in the clade Littorinimorpha. This family used to be known as the Vitrinellidae. Iredale has shown that the family Adeorbidae Monterosato, 1884 should be called Tornidae
George Washington Tryon Jr. was an American malacologist who worked at the Academy of Natural Sciences in Philadelphia.
Dentalium is a large genus of tooth shells or tusk shells, marine scaphopod molluscs in the family Dentaliidae. The genus contains 50 described species and about 50 extinct species.
Syntomodrillia is a genus of sea snails, marine gastropod mollusks in the family Drilliidae.
Gadila is a genus of small tusk shells, which are marine scaphopod molluscs in the family Gadilidae.
Rectaxis is a genus of predatory air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Spiraxidae.
Entalinidae is a family of tusk shells, marine scaphopod mollusks in the order Gadilida.
Rhabdus rectius, also known as a straight tusk shell, is a species of scaphopod, a small marine mollusc native to the coast of central California whose shell, like that of all the members of its order, resembles a tusk. Most members of the scaphopoda have shells that exhibit a noticeable and characteristic anterior curvature— the shell of R. rectius, however, is unusually straight, hence the Latin word "rectius" in its binomial designation. R. rectius is a generalist carnivore found in shallow silty and sandy substrates. Aside from the usual diet of foraminiferans, it also eats sediment and fecal pellets. Its thin, straight shell becomes fragile when dehydrated. Some adult specimens are more than 10 centimetres (3.9 in) long, and have a maximum diameter of about 6 mm.
Fustiaria is a genus of scaphopods in the order Dentaliida and is the only genus comprising the family Fustiariidae, with 24 species.
The Jama Formation is a Pliocene to Early Pleistocene geologic formation in Ecuador. The claystones and sandstones were deposited in an coastal environment. The age of the Jama Formation is constrained by 40Ar/39Ar dating of tephra beds. The formation is correlated to the Charco Azul Formation of western Panama and southeastern Costa Rica.
The Canoa Formation is a Piacenzian to Calabrian geologic formation in Ecuador. The sandstones were deposited in a coastal environment. The formation is correlated to the Charco Azul Formation of western Panama and southeastern Costa Rica.
Compressidentalium is a genus of tusk shells, marine scaphopod mollusks.
Gadilinidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.
