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Assembling the Squamate Tree of Life: Perspectives from the Phenotype and the Fossil Record
TLDR
This study relied on traditionally prepared specimens as well as high-resolution computed tomography scans that afforded unprecendented access to the cranial anatomy of Squamata to provide an unparalleled sample of the phenotype enabling it to more fully explore the extreme incongruences between molecular and morphological topologies for the squamate tree of life.
An ancestral turtle from the Late Triassic of southwestern China
TLDR
A new 220-million-year-old turtle from China is described that documents an intermediate step in the evolution of the shell and associated structures and shows that the turtle shell is not derived from a fusion of osteoderms.
Studies on skeleton formation in reptiles: Patterns of ossification in the skeleton of Chelydra serpentina (Reptilia, Testudines)
  • O. Rieppel
  • Environmental Science, Geology
  • 1 November 1993
TLDR
Convergence of ontogenetic repatterning in the ossification of the axial skeleton in Chelydra and Squamata is discussed, as are problems of adaptive modification of oSSification patterns.
Reptile phylogeny and the interrelationships of turtles
TLDR
The results refute earlier hypotheses that turtles are related to parareptiles, i.e. to procolophonids or pareiasaurs, and strongly supports a monophyletic Parareptilia, sister-group of a monphyletic Eureptilia.
A fossil snake with limbs.
TLDR
Phylogenetic analysis of the relationships of the new taxon, as well as reanalysis of Pachyrhachis, shows both to be related to macrostomatans, a group that includes relatively advanced snakes such as pythons, boas, and colubroids to the exclusion of more primitive snake such as blindsnakes and pipesnakes.
Patterns and processes
Classification, Evolution and the Nature of Biology.By Alec L. Panchen.Cambridge University Press: 1992. Pp. 403. £45, $80 (hbk); £16.95, $34.95 (pbk).
Studies on skeleton formation in reptiles. v. Patterns of ossification in the skeleton of Alligator mississippiensis DAUDIN (Reptilia, Crocodylia)
  • O. Rieppel
  • Biology, Environmental Science
  • 1 November 1993
TLDR
Ontogenetic repatterning in the ossification of the axial skeleton is discussed as it bears on the serial homology of dorsal ribs, sacral ribs and caudal ribs (transverse processes).
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