The schizognathous formation is doubtless the most primitive, and its representatives form a tolerably natural FIG.
This skull is unusually schizognathous, the vomer (v.) being very small, and the maxillo - palatine process (mxp) much aborted.
Parker.) gnathism has been produced in half a dozen ways, implying numerous cases of convergence without any nearer relationship than that they are all derived from some schizognathous group or other.
The Aegithognathae, meant to comprise the passeres, woodpeckers and swifts, &c., are really schizognathous but with a vomer which is broadly truncated in front.
Order Galliformes.-Schizognathous, herbivorous, terrestrial.