How To Use Heterocercal In A Sentence

Now, in the development of a teleost fish (Fig. 68), as has been shown by Alexander Agassiz, the tail-fin is first like Fig. 70; then becomes heterocercal, like Fig. 69; and, finally, becomes homocercal like Fig. 68. Darwin, and After Darwin (Vol. 1 and 3, of 3) An Exposition of the Darwinian Theory and a Discussion of Post-Darwinian Questions
The sturgeon's heterocercal tail is extremely flexible and the upper tail lobe trails the lower during the fin beat cycle.
Paddlefish are not closely related to sharks, but they do share some common characteristics including a skeleton primarily composed of cartilage, and a deeply forked, abbreviate heterocercal tail fin (the top fin lobe is slightly larger than the lower fin lobe). Archive 2007-01-01
The body shows well-developed paired lateral fins (presumably true pectoral fins), indicating good stability, dorsal and anal fins, and a heterocercal tail (the lower lobe of the tail is elongated).
The sturgeon heterocercal tail is extremely flexible and the upper tail lobe trails the lower during the fin beat cycle.

They also possess a heterocercal caudal fin and remnants of ganoid scales; both are uncommon among extant actinopterygians.
They also have a cartilaginous skeleton, heterocercal tail, and lack scales.
Sharks, and similar chondrichthyes, have heterocercal tails; the diphycercal tails are found in lungfish and their relatives; and the homocercal tail is characteristic of bony fish.
The tail is heterocercal, with the upper lobe containing long, thread-like filaments.
The current literature contains several hypotheses about the function of caudal fins of different shapes, and much of this discussion has focused on the difference between heterocercal and homocercal tails.
While the classical view of shark tail function was corroborated by the three-dimensional kinematic study of leopard sharks, the pattern of heterocercal tail function in sturgeon proved to be quite different.