diphycercal

/dif-uh-sur-kuhl/US // ˌdɪf əˈsɜr kəl //UK // (ˌdɪfɪˈsɜːkəl) //

偶蹄类,偶蹄类动物,偶蹄类化合物,偶蹄类的

Definitions

adj.形容词 adjective

1
Ichthyology.
- : having a tail or caudal fin with the spinal column extending horizontally to the end of the tail, characteristic of lungfish, several other primitive fishes, and the juvenile stage of modern bony fishes.

In Dipterus there are no marginal teeth, and the tail is heterocercal, not diphycercal, as in the other Dipnoans generally.
In the Ctenodontidæ the tail is diphycercal, and no jugular plates are present in the known specimens.
The tail is diphycercal in all, ending in a long point, and the body is covered with cycloid scales.
The tail is heterocercal, but in some cases (Squatina) approaches the diphycercal condition.
The blade of the caudal fin is then divided into two nearly equal portions, and is said to be diphycercal.