unicuspid


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unicuspid

[¦yü·nə′kəs·pəd]
(anatomy)
Having one cusp, as certain teeth.
References in periodicals archive ?
Unicuspid aortic valve in adults: a systematic review.
Two of the Arkansas specimens [NLU 23654 (mixed), 75186, Table 1] were re-identified as L unicuspis based on tooth counts, tooth structure (unicuspid vs.
hirtosa left distinct grazing strokes upon the artificial wax substrate; these strokes generally matched the broad unicuspid shape of the teeth (Figs.
Phrynosomatids (excluding Phrynosoma) differ in having at least some tricuspate teeth and anterior unicuspid teeth are usually more pointed than those of Eumeces.
4) The radula central tooth is unicuspid. 5) Lateral teeth 0-2; when present with two short cusps.
Teeth in about 5 rows; 7-8 plus one emerging tooth along middle, 29 along posterior margin; compressed, along margins and anteriorly slender, unicuspid; mediad and caudad slightly coarser and longer, bicuspid, with strong posterior, antrorse cusp and minor anterior blunt cusp subdistally.
preblei by its small size (total length, 82 mm; length of tail, 36 mm; length of hind foot, 10 mm; weight, 2.5 g), relative size of unicuspid teeth (third slightly larger than the fourth), and presence of a small medial tine on [I.sup.1] (Junge and Hoffmann, 1981).
Premaxilla and dentary with many irregularly distributed unicuspid, slightly curved teeth of different sizes and small number of larger teeth in outer row of upper and lower jaws.
We did not remove the skull but the diagnostic dental features were easily visible when the lips were parted; the third unicuspid was larger than the fourth and the median surfaces of unicuspid teeth were pigmented.
Subdistal segments of posterior branch of ray 4 bearing thorn-like spines; two halves of posterior branch separated; 13-16 large unicuspid retrorse serrae on right half of ray 4, diminishing in size anteriorly; 9 or 10 serrae on left half of ray 4, smaller anteriorly and a few bicuspid (two-horned processes) proximally.
As in many Haplochromis species, posteriormost tooth in upper jaw unicuspid. Teeth of inner rows smaller and tricuspid.