21 Scaphopods

The tusk shells or tooth shells, technically the Scaphopoda, are members of a class of shelled marine mollusc with worldwide distribution, and are the only class of exclusively infaunal marine molluscs. Shells of species within this class range from about 0.5 to 15 cm in length. Members of the order Dentaliida tend to be significantly larger than those of the order Gadilida.

Antalis diarrhox is a species of tusk shell, a marine scaphopod mollusk in the family Dentaliidae.

Antalis vulgaris, commonly known as the common tusk shell, is a species of scaphopods mainly encountered on sandy bottoms from 5 to 1000 meters depth.

Cadulus is a large genus of small tusk shells in the family Gadilidae. It contains over fifty-one described species.

Cadulus delicatulus is a species of small tusk shell, a marine scaphopod mollusk in the family Gadilidae. This species is endemic to New Zealand.

Costentalina is a genus of medium-sized tusk shells, marine scaphopod molluscs in the family Entalinidae.

Dentaliida is one of the two orders of scaphopod mollusks, commonly known as elephant's tusk shells. The order Dentaliida contains most of the larger scaphopods, and is distinguished from the other order by the shape of its shell, the shape of the foot, and the arrangement of some of their internal organs.

Dentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.

Dentalium elephantinum, the elephant tusk, is a species of scaphopod mollusc. Its shell is often deep green fading to white at its tip and has between eight and 17 strong ribs along its sides. Adults are about 70 mm in length with an diameter of about 11 mm at the shell aperture. It is native to Amboyna, the Philippine Islands, and the Red Sea.

Entalinidae is a family of tusk shells, marine scaphopod mollusks in the order Gadilida.

Fustiaria is a genus of scaphopods in the order Dentaliida and is the only genus comprising the family Fustiariidae, with 24 species.

Gadilida is an order of very small tusk shells, marine scaphopod molluscs.

Gadilidae is a family of tusk shells in the order Gadilida.

Gadilinidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.

Laevidentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.

The Rhabdidae are scaphopod members of the same molluscan family, belonging to the order Dentaliida. It includes only one genus, Rhabdus, and five species, as follows:Rhabdus aequatorius Rhabdus dalli Rhabdus perceptus Rhabdus rectius Rhabdus toyamaense

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.

Siphonodentalium colubridens is a tusk shell or scaphopod in the family Gadilidae of the order Dentaliida.