Figure 4

Rostral view of the linguo-laryngeal apparatus of D. novaehollandiae . a: The normal resting position of the tongue body (T), root (R) and laryngeal mound. Note the wide glottis (G) and the tongue root which protrudes into the glottis. Mucosal covered arytenoid cartilage (Ar), lips of the glottis (L) and their round protrusion (star) and lateral lingual papilla (*). b: With the linguo-laryngeal apparatus in position note how the caudal protrusion of the tongue root is positioned over the rostral aspect of the laryngeal mound and adducted glottis and approximates the round protrusions of the glottal lips.