dermal bone


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dermal bone

[¦dər·məl ′bōn]
(anatomy)
A type of bone that ossifies directly from membrane without a cartilaginous predecessor; occurs only in the skull and shoulder region. Also known as investing bone; membrane bone.
References in periodicals archive ?
The pelvic girdle was firmly attached to the vertebral column, and the pectoral girdle had smaller extrascapular dermal bone components (with the exception of the clavicle, which was larger).
Diagnosis: Scleropages inscriptus differs from all other Scleropages in having highly distinctive angulated linear markings on dermal bones of circum-orbital and opercular series on sides of head and on scales on sides of body.
The longspined bullhead Taurulus bubalis has spinulose dermal bones on the head and, according to Hayward & Ryland (1995), minute spinules on the trunk.