This is a class of monsters which, like the chimera, are assembled from pieces of other beasts or monsters.  A great many of the classic monsters of heraldry may be described in this manner: e.g., the griffin, with the forequarters of an eagle and the hindquarters of a lion.  But the term usually denotes those monsters with no independent history.  They are thus usually blazoned by parts, e.g., “A monster with the forequarters of a dragon, hindquarters of a lion”, or the “cock with the head of a goat” in the arms of von Kockorsch, 1605 [Siebmacher 74].

There are exceptions, such as the Hrassvelg monster, which have been given special names; but this is no longer done, out of pity for the artists.

The Baron of Lions Gate bears as a badge:  A monster rampant with the body of a lion sable and the head and tail of an alligator argent. [A “lionsgator”.]

Siobhán Nic Bhloscaidh bears:  Per fess purpure and sable, a boar-headed horse with lion’s forelegs rampant Or.

Mandrigal of Mu bears:  Gules, a monster couchant with the forequarters of a domestic cat and the wings and hindquarters of a dragon Or.