heterocercal

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.