dermal denticle


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dermal denticle

[¦dər·məl ′dent·i·kəl]
(vertebrate zoology)
A toothlike scale composed mostly of dentine with a large central pulp cavity, found in the skin of sharks.
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References in periodicals archive ?
The seven categories (and sections) are: Anatomy and morphology (body size, colouration, dermal denticles, dentition, skeletal components, egg cases); Checklists and biological inventories (distribution ranges); Habitats and feeding habits; Life-history patterns (reproduction, age, growth and longevity); Fisheries (soutiieast Pacific, soutiiwest Atlantic); Genetics; and Parasites.
Dermal denticles low, small, truncate, distinctly block-like crowns without any spines, irregularly arranged along head and trunk; denticles on caudal fin more rhomboid in shape and relatively anteriorly oriented; smaller specimens possessing dermal denticles with pointed crowns.
Development of dermal denticles in skates (Chondrichthyes, Batoidea): Patterning and cellular differentiation.
Reif (1985) suggested that dermal denticles are family, genus, and in some cases even species specific.
Its dermal denticles decrease drag and turbulence by directing water flow over the body, which allows surrounding water to pass over the shark more effectively.