Plagiosaurus
Encyclopedia
Plagiosaurus is an extinct genus of temnospondyl amphibian
. They were paedomrphic, retaining the larval gill
s on adulthood. They had weak simplified vertebrae, consisting of large intercentra and neural arches, the stereospondyl
condition.
Amphibian
Amphibians , are a class of vertebrate animals including animals such as toads, frogs, caecilians, and salamanders. They are characterized as non-amniote ectothermic tetrapods...
. They were paedomrphic, retaining the larval gill
Gill
A gill is a respiratory organ found in many aquatic organisms that extracts dissolved oxygen from water, afterward excreting carbon dioxide. The gills of some species such as hermit crabs have adapted to allow respiration on land provided they are kept moist...
s on adulthood. They had weak simplified vertebrae, consisting of large intercentra and neural arches, the stereospondyl
Stereospondyli
The Stereospondyli are a group of extinct temnospondyl amphibians. Relative to other early tetrapods , they had simplified backbones, where the whole vertebra was made of a single intercentrum, topped by a neural arch. The whole vertebral structure was rather weak, meaning that most stereospondyls...
condition.