Evolvability of the vertebrate craniofacial skeleton. (July 2019)

• Record Type: Journal Article
• Authors: Fish, Jennifer L.
• Is Part Of: Seminars in cell & developmental biology. Volume 91(2019)
• Page Start: 13
• Page End: 22
• Publication Date: 2019-07
• Subjects: Cranial neural crest -- Morphological variation -- Evolution of development -- Hinge -- FEZ -- Origin of jaw; Cytology -- Periodicals; Developmental biology -- Periodicals; 571.6
• DOI: 10.1016/j.semcdb.2017.12.004
• Languages: English
• ISSNs: 1084-9521

Abstract

Abstract: The skull is a vertebrate novelty. Morphological adaptations of the skull are associated with major evolutionary transitions, including the shift to a predatory lifestyle and the ability to masticate while breathing. These adaptations include the chondrocranium, dermatocranium, articulated jaws, primary and secondary palates, internal choanae, the middle ear, and temporomandibular joint. The incredible adaptive diversity of the vertebrate skull indicates an underlying bauplan that promotes evolvability. Comparative studies in craniofacial development suggest that the craniofacial bauplan includes three secondary organizers, two that are bilaterally placed at the Hinge of the developing jaw, and one situated in the midline of the developing face (the FEZ). These organizers regulate tissue interactions between the cranial neural crest, the neuroepithelium, and facial and pharyngeal epithelia that regulate the development and evolvability of the craniofacial skeleton.