: LCA Turtles and birds (link).
Range: from the Late Carboniferous.
Phylogeny: Sauropsida: Mesosauridae + *: Anapsida + Eureptilia.
Characters: Tabular small or absent; large posttemporal fenestra; suborbital foramen (small
hole near the lateral
6. Typhlonectidae TAYLOR, 1968 Aquatic caecilians with no tail
and a rounded cloacal opening. Dermal scales lacking or very reduced
as in Typhlonectes compressicauda. Small tentacles, originating
between the nasal opening and the eye.
The lepospondyls consist of four orders of mostly small aquatic tetrapods. All
are limited to the Carboniferous and/or early Permian. They may or may not be
an artificial (polyphyletic) group. They may be ancestral to modern am
The pectoral fin of Panderichthys and the origin of
digitsatherine A. Boisvert1, Elga Mark-Kurik2 & Per E.
One of the identifying characteristics of tetrapods
(limbed vertebrates) is the presence of fingers and toe
extinct genus of lungfish
from the late Devonian
period of Australia and
Tarpons, bonefish, eels , etc.
Range: possibly from Jurassic, certainly from the
Phylogeny: Elopocephala: Clup
Derived (modified) different from the ancestral condition
- feet of terrestrial vertebrates
Shared derived character - synapomorphies
Plesiomorphies similar to the ancestor
- vertebral column