“On base of the comparison study presents here, it seems that tooth bases of chameleons living in closed habitats are not in contact (larger interdental gaps of bigger teeth), while chameleons with wider heads from open habitats have tooth bases in contact or nearly so (imbricate teeth alignment).”…
http://www.geology.cz/bulletin/fulltext/1259_Cernansky_b.pdf
http://www.geology.cz/bulletin/fulltext/1259_Cernansky_b.pdf