|
|
Definition of Heterocercal fin
1. Noun. A tail fin with unequal lobes in which the vertebral column turns upward into the larger lobe as in sharks.
Lexicographical Neighbors of Heterocercal Fin
Literary usage of Heterocercal fin
Below you will find example usage of this term as found in modern and/or classical literature:
1. Palaeontology Or A Systematic Summary of Extinct Animals and Their by Richard Owen (1861)
"... the base of the Devonian system, which shew a dorsal fin, pectoral fins, and
a large heterocercal fin, besides a well-marked capsule of the eye-ball. ..."
2. A Text-book of Zoology by Thomas Jeffery Parker, William Aitcheson Haswell (1921)
"... tail-fin is really quite as unsymmetrical as the heterocercal fin of the
Dog-fish, since, its morphological axis being constituted by the notochord, ..."
3. Catalogue of the Preparations of Comparative Anatomy in the Museum of Guy's by Philip Henry Pye-Smith, Guy's Hospital Museum (1874)
"Notice the cartilaginous spinal column, with the greatest number of vertebra
known (365), and the long tail with a small heterocercal fin. ..."
4. The Popular Science Review: A Quarterly Miscellany of Entertaining and (1878)
"1), Professor Owen remarks :f " If a heterocercal fin were added to the restoration,
a correct idea would be given of the Old Red fossil, which, ..."
5. Vertebrate Zoölogy by Horatio Hackett Newman (1920)
"... developed heterocercal fin. The Holocephali may be dismissed then as an
interesting but not especially significant side-line of elasmobranch evolution. ..."
Other Resources:
