[het-er-uh-sur-kuh l] /ˌhɛt ər əˈsɜr kəl/

adjective, Ichthyology.
having an unequally divided tail, characteristic of sharks, rays, and skates.
(ichthyol) of or possessing a tail in which the vertebral column turns upwards and extends into the upper, usually larger, lobe, as in sharks Compare homocercal


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