denticle


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Related to denticle: dorsal

denticle

[′dent·ə·kəl]
(zoology)
A small tooth or toothlike projection, as the type of scale of certain elasmobranchs.
References in periodicals archive ?
At that time, the company was unable to produce marketable shark leather because of the inability to remove the dermal denticles of the shark hides, which were described by Ehrenreich as being "hard as steel.
Sample size for each range of values is given in brackets as number of individuals for morphometric ratios, and number of combs or fingers for pectine teeth and denticle counts, respectively.
1] element: anterior part of blade high, cusp big and wide, next to cusp posterior denticle is also big and high, slightly inclined posteriorly.
The dermal denticles (Figs 8 and 9) are characteristic; they have a central strong ridge terminating in a long point, and two shorter ridges on wing-like sides.
there is less friction on the small surface of the denticle tips.
Movable finger with small lobe (eminence) proximally; movable finger length 72-89% (L) or 99-105% (9) greater than length along ventroexternal carina (Table 1); dentate margins of fixed and movable fingers each with eight oblique denticle rows, in addition to short apical row of four denticles; each row terminating in large denticle at proximal and distal ends; rows slightly imbricated, terminal denticle of each row displaced distally from the main row by space of one or more denticles; internal and external supernumerary denticles present in addition to internal and external accessory denticles; fingers each with an enlarged terminal denticle.
bigelowi, and lack points coming off the central denticle, unlike in its two congeners, which are taller in height and possess small points coming off the central denticle (Shirai & Tachikawa 1993).
Claw with strong denticle in middle of inner edge of claw.
Peristome markedly oblique, more or less in one tangential plane; aperture subcircular to roundly quadrate; columella lip robust, with 2 relatively massive teeth, the upper one slightly more robust, the lower one somewhat narrower and with a small denticle on its lower margin; parietal and umbilical region covered with well-developed, glossy callus which flares outward over base; callus porcelaneous and mostly smooth, but with some beads of unequal size in region adjacent to columella teeth; one particularly strong bead at base of lower columella tooth; edge of callus raised and flaring where it joins flared margin of outer lip.
Each tooth has a number of denticles, added during growth, affixed to a bar, with the longest denticle lateral.