, Volume 66, Issue 4, pp 337-399

Schädelmorphologie und Kiefermechanik der Caprimulgidae (Aves)

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Abstract

The goatsuckers are able to enlarge the opening of the mouth in two dimensions. A very broadened occipital region, a division of the Musculus pterygoideus in two parts, and two pairs of highly adapted intramandibular articulations are the morphological conditions for the mechanism. The jaws are spread by several simultaneous movements. As a result of these movements the five parts of the lower jaw, the two quadrates and the skull base integrate into the annular gular frame of the expanded mouth. The unusual kinetik is an adaptation to nocturnal living.

Dissertation der Naturwissenschaftlichen Fakultät der Universität Hohenheim.