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Cranial Anatomy of Ennatosaurus tecton (Synapsida: Caseidae) from the Middle Permian of Russia and the Evolutionary Relationships of Caseidae
Phylogenetic analysis of Caseidae yields a single most parsimonious tree and its topology reveals that the pattern of dental complexity in terms of the number of apical cuspules is homoplasious, cautioning against its use as a unidirectional phylogenetic character.
Reappraisal of the Early Permian amphibamid Tersomius texensis and some referred material
Evolution of the Amphibian Ear with Implications for Lissamphibian Phylogeny: Insight Gained from the Caecilian Inner Ear
Characters of the ear seemingly provide synapomorphies that unite lissamphibians with amphibamid temnospondyls, potentially improving the resolution of concepts about the affinities of frogs, salamanders, and caecilians and clarifying issues of tetrapod ear evolution.
A redescription of Carrolla craddocki (Lepospondyli: Brachystelechidae) based on high‐resolution CT, and the impacts of miniaturization and fossoriality on morphology
The results suggest brachystelechid cranial morphology is strongly influenced by miniaturization (enlarged sensory organs, anterior placement of the jaw articulation, and combination of both reduced‐ and hyper‐ossifications) and burrowing habits and future efforts should continue to focus on fine details of anatomy minimally affected by these influences to contribute to the resolution of the question of the origin of caecilians.
Histological microstructure of the claws of the African clawed frog, Xenopus laevis (Anura: Pipidae): implications for the evolution of claws in tetrapods.
Observations do not support homology of claws on a structural level in these two groups; however, further experimental work may confirm a conserved pattern of cornification in these structures in tetrapods.
The Braincase of Eocaecilia micropodia (Lissamphibia, Gymnophiona) and the Origin of Caecilians
The braincase of E. micropodia was examined via micro-computed tomography and Ancestral character state reconstruction confirms the braincase to be largely representative of the plesiomorphic condition of extant caecilians.
AN EARLY PERMIAN VARANODONTINE VARANOPID (SYNAPSIDA: EUPELYCOSAURIA) FROM THE RICHARDS SPUR LOCALITY, OKLAHOMA
Abstract Description of the first varanodontine varanopid material from the highly fossiliferous limestone fissure fill deposits at Richards Spur (Dolese Brothers Limestone Quarry), Oklahoma, is…
Evolutionary development of the neurocranium in Dissorophoidea (Tetrapoda: Temnospondyli), an integrative approach
This study refines hypotheses of large‐scale evolutionary trends within Dissorophoidea that may have facilitated the radiation of amphibamids and, projected forward, the origin of the generalized batrachian skull.
Is solid always best? Cranial performance in solid and fenestrated caecilian skulls
- T. Kleinteich, H. Maddin, J. Herzen, F. Beckmann, A. Summers
- BiologyJournal of Experimental Biology
- 1 March 2012
The results of the FEA suggest a strong relationship between the head angle and skull performance, implying there is an optimal head angle during burrowing.
Deciphering morphological variation in the braincase of caecilian amphibians (gymnophiona)
- H. Maddin
- BiologyJournal of morphology
- 1 July 2011
It is concluded that either currently unrecognized causes of heterochrony or combinations thereof have influenced morphology in different lineages independently and these data identify clades whose morphology can be reconsidered in light of previously unrecognized heterochronic events, thereby providing a foundation for future analyses of the evolution of morphology within Gymnophiona as a whole.