The skin of the Newt is quite devoid of any exoskeletal structures.
In Teleostei dental plates are usually developed as an exoskeletal covering on parts of the branchial arches.
The teeth are exoskeletal structures, partly of dermal, partly of epidermal origin.
Frequently, however, this exoskeletal somite may be differentiated into various regions.
The skin of the frog is smooth and quite devoid of scales or other exoskeletal structures.
Other exoskeletal structures besides feathers are commonly well developed.
Mammals show two principal kinds of exoskeletal structures which are entirely or partially dermal in origin, viz.
exoskeleton ex·o·skel·e·ton (ěk'sō-skěl'ĭ-tn)
All hard parts, such as hair, teeth, and nails, that develop from the ectoderm or mesoderm in vertebrates.
A hard outer structure, such as the shell of an insect, that provides protection or support for an organism.
A hard, protective outer body covering of an animal, such as an insect, crustacean, or mollusk. The exoskeletons of insects and crustaceans are largely made of chitin. Compare endoskeleton.