Examples from the Web for diphycercal
The tail is diphycercal in all, ending in a long point, and the body is covered with cycloid scales.
The tail is diphycercal, heterocercal, or else it degenerates into a whip-like organ, a form which has been called leptocercal.
The tail may be heterocercal, as in Acipenser, or diphycercal as in Polypterus.The Vertebrate Skeleton|Sidney H. Reynolds
In Dipterus there are no marginal teeth, and the tail is heterocercal, not diphycercal, as in the other Dipnoans generally.
In most primitive types, as in most embryonic fishes, the vertebræ grow smaller to the last (diphycercal).