Definition of Protocercal. Meaning of Protocercal. Synonyms of Protocercal
Here you will find one or more explanations in English for the word Protocercal.
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Definition of Protocercal
Protocercal Protocercal Pro`to*cer"cal, a. [Proto- + Gr. ? the tail.]
(Zo["o]l.)
Having a caudal fin extending around the end of the vertebral
column, like that which is first formed in the embryo of
fishes; diphycercal.
- often fan-shaped. The tail may be heterocercal, reversed heterocercal, protocercal, diphycercal, or homocercal. Heterocercal: vertebraeextend into the... - not extend to the tip the upper lobe (e.g. in stem Neopterygii) (B) - Protocercalmeans the vertebraeextend to the tip of the tail and the tail is symmetrical... - main propulsion organs. Most median fins disappeared, leaving only a protocercal tailfin. Since the shallows were subject to occasionaloxygen deficiency...
