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 ?
tigerina is heterodont with two to three wedge-shaped cardinal teeth set in the center near the umbones.
The left valve presents two grooved cardinal teeth, which fit in the two opposite sockets.
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.
Left valve with two crenulated cardinal teeth very close together, and two thick lateral teeth (only the anterior part preserved).