𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Has evolution resulted in linear reduction of the jaw?

✍ Scribed by Perlow, Jack

Book ID
122560951
Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
232 KB
Volume
98
Category
Article
ISSN
1097-6752

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## Abstract This study reveals the existence of four distinct but genetically related types of upper jaw mechanisms: 1. The non‐protractile, with no mechanism for the protrusion of the pre‐maxillae. The maxillaries form part of the upper margin of the mouth, as in Isospondyli, Apodes and Haplomi.