cardinal teeth


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cardinal teeth

[′kärd·nəl ‚tēth]
(invertebrate zoology)
Ridges and grooves on the inner surfaces of both valves of a bivalve mollusk near the anterior end of the hinge.
References in periodicals archive ?
According to the fossil mussel's trigonal outline, freshwater habitat and above mentioned hinge characters (opisthodetic external ligament, and hinge consisting of two strong cardinal teeth in the left valve and one in the right), Protopleurobema numantina may be included in the order Unionoida.
The hinges are nevertheless very similar in both, with cardinal teeth that are markedly pyramidal.
Left valve with two crenulated cardinal teeth very close together, and two thick lateral teeth (only the anterior part preserved).