neural arch

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Related to neural arches: neural arch of vertebra, hemal arches

neural arch

[′nu̇r·əl ′ärch]
(anatomy)
References in periodicals archive ?
Geringophis vertebrae are typical of many Eocene and Oligocene erycine snakes in that they are relatively small, short, and wide, but they are unique among these boids in having flattened neural arches, relatively high and long neural spines that are swollen dorsally, and well-developed hemal keels and subcentral ridges (Holman, 8; Sullivan and Holman, 9).
It was necessary to use several neural arches per shark in order to differentiate a clear set of bands (annuli).
Interestingly, vertebrae of the geographically restricted water snake Nerodia harteri are similar to those of Thamnophis in having strongly posteriorly directed hypapophyses; low neural spines; and moderately depressed neural arches.
In living sea snakes, which have strongly compressed paddle-like tails, the caudal vertebrae are modified in their morphology (usually by strong lateral compression and often tall, narrow neural spines and/or compressed ventrolateral processes that project ventrally rather than laterally) and articulation (strongly overlapping neural arches to give rigidity to the tail region).
The vertebrae are distinguished from living Heterodon based on their more vaulted neural arches (Holman, 1977).
The two vertebrae (12528) have higher neural arches than those of similar-sized species of Lampropeltis, but lower than those of Pituophis.