hemal spine


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he·mal spine

the middle point on the underside of the hemal arch of a vertebra in lower vertebrates.

hemal spine

That part of the hemal arch of a typical vertebra that closes it in.
See also: spine
References in periodicals archive ?
A Principal Component Analysis was performed onto the caudal series (from the 20th element backward), using the configuration including the hemal spine. The first two components account for the 84.5% of the total variance (Fig.
In many teleosts caudal rays ate attached also to the parhypural (PH) and to the hemal spine of the preural 2 (PU2).
E, epurals; Hs, hemal spines; Na, neural arches; H, hypurals; DL, dorsal lobe; VL, ventral lobe; PH, parahipural; PBR, principal branched rays; PSR, principal simple rays.