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Molecular phylogeny of advanced snakes (Serpentes, Caenophidia) with an emphasis on South American Xenodontines: a revised classification and descriptions of new taxa
A analise sugere algumas alteracoes de cunho taxonomico dentro dos xenodontineos, incluindo realocacoes genericas para Alsophis elegans, Liophis amarali e modificacoes substanciais em relacao a Xenodontini e a radiacao dos xenodermatideos das Antilhas.
Hemipenial morphology of the South American xenodontine snakes : with a proposal for a monophyletic Xenodontinae and a reappraisal of colubroid hemipenes. Bulletin of the AMNH ; no. 240
- H. Zaher
This work discusses Hemipenial Morphology in Snake Systematics, with Emphasis on the Xenodontines, and the Genera Placed in the Families Atractaspididae and "Colubridae".
A Complete Skull of an Early Cretaceous Sauropod and the Evolution of Advanced Titanosaurians
A new sauropod dinosaur from the Early Cretaceous of Brazil represents the earliest advanced titanosaurian known to date, demonstrating that the initial diversification of advanced titosaurians was well under way at least 30 million years before their known radiation in the latest Cret Jurassic.
A Cretaceous terrestrial snake with robust hindlimbs and a sacrum
The new fossil from the Upper Cretaceous period of Patagonia fills an important gap in the evolutionary progression towards limblessness and retains several features associated with a subterranean or surface dwelling life that are also present in primitive extant snake lineages, supporting the hypothesis of a terrestrial rather than marine origin of snakes.
Molecular phylogeny of the New World Dipsadidae (Serpentes: Colubroidea): a reappraisal
- Felipe G. Grazziotin, H. Zaher, S. Bonatto
- BiologyCladistics : the international journal of the…
- 1 October 2012
In order to maintain monophyly, the genus Umbrivaga is synonymized with Erythrolamprus, and two new genera are erected to accommodate Phimophis iglesiasi and Clelia rustica, as well as their closely related species.
Diversification in vipers: Phylogenetic relationships, time of divergence and shifts in speciation rates.
A New Notosuchian from the Late Cretaceous of Brazil and the Phylogeny of Advanced Notosuchians
- D. Pol, Paulo M. Nascimento, A. Carvalho, C. Riccomini, R. Pires-Domingues, H. Zaher
- BiologyPloS one
- 2 April 2014
The phylogenetic analysis results in a monophyletic genus Caipirasuchus, that is the sister group of a clade fomed by Sphagesaurus huenei, Caryonosuchus pricei, and Armadillosuchu arrudai, and Sphagesaurids also include a basal clade formed by Adamantinasuchus navae and Yacarerani boliviensis.
The skull of the Upper Cretaceous snake Dinilysia patagonica Smith-Woodward, 1901, and its phylogenetic position revisited
Results of a phylogenetic analysis support a basal position of Dinilysia, as the sister-taxon to all extant snakes, and confirm the presence of a crista circumfenestralis, which represents an important derived ophidian synapomorphy.
Redescription of the Cranial Morphology of Mariliasuchus Amarali, and Its Phylogenetic Affinities (crocodyliformes, Notosuchia)
The presence of procumbent premaxillary teeth, specialized tooth crown morphology, and fore–aft jaw movements suggests that this group presented complex jaw movements related to specialized feeding habits.
The anatomy of the upper cretaceous snake Najash rionegrina Apesteguía & Zaher, 2006, and the evolution of limblessness in snakes
Najash rionegrina documents an important gap in the evolutionary development towards limblessness, because its phylogenetic affinities suggest that it is the sister group of all modern snakes, including the limbed Tethyan snakes Pachyrhachis, Haasiophis, and Eupodophis.