Dentaliida is one of the two
orders of
scaphopod mollusk
Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks (). Around 85,000 extant species of molluscs are recognized. The number of fossil species is e ...
s, commonly known as elephant's
tusk shells. The order Dentaliida contains most of the larger scaphopods, and is distinguished from the other order (the
Gadilidae
Gadilidae is a family of tusk shells in the order Gadilida.
Genera
* ''Bathycadulus'' Scarabino, 1995
* '' Cadulus'' Philippi, 1844
* ''Dischides'' Jeffreys, 1867
* '' Gadila'' Gray, 1847
* ''Polyschides'' Pilsbry & Sharp, 1898
* ...
) by the shape of its shell (the Dentaliid shell tapers uniformly from anterior to posterior; the Gadilid one has an anterior shell opening slightly smaller than the shell's widest point), the shape of the foot (the Dentaliid foot is boat-shaped with a central trough; the Gadilid foot is star-shaped), and the arrangement of some of their internal organs.
Families
*
Anulidentaliidae
*
Calliodentaliidae
*
Dentaliidae
Dentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order Dentaliida.
Genera
* '' Antalis'' H. & A. Adams, 1854
* '' Coccodentalium'' Sacco, 1896
* '' Compressidentalium'' Habe, 1963
* '' Dentalium'' ...
*
Fustiariidae
*
Gadilinidae
*
Laevidentaliidae
Laevidentaliidae is a family of relatively large tusk shells, scaphopod mollusks in the order
Order, ORDER or Orders may refer to:
* Categorization, the process in which ideas and objects are recognized, differentiated, and understood
* Het ...
*
Omniglyptidae
*
Rhabdidae
References
Scaphopods
Mississippian first appearances
Extant Carboniferous first appearances
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