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A new coccidian parasite (Apicomplexa: Eimeriidae: Eimeria) from the southern black racer, Coluber constrictor priapus (Reptilia: Ophidia: Colubridae) from Arkansas, USA

100%

McAllister C. T., Hnida J. A., Robison H. W.

Acta Parasitologica

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2018

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tom 63

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nr 3

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The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)

100%

Hsiou A. S., Albino A. M., Medeiros M. A., Santos R. A. B.

Acta Palaeontologica Polonica

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2014

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tom 59

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nr 3

South American Mesozoic snake diversity is mostly represented by genera from the Cenomanian (Najash), Santonian– Campanian (Dinilysia), and Campanian–Maastrichtian (Alamitophis, Patagoniophis, Rionegrophis, and Australophis) of Patagonia, Argentina. In this paper, we describe a new snake genus and species, Seismophis septentrionalis, from the Cenomanian (early Late Cretaceous) of the Alcântara Formation, Maranhão, northeastern Brazil. The new snake comprises a posteriormost trunk vertebra and possibly a poorly preserved midtrunk vertebra. Both vertebrae share small size, zygosphene moderately thick with a rectilinear roof, absence of paracotylar foramina, presence of parazygantral foramina, and strongly marked parasagittal ridges of the neural arch. The new snake is here considered of uncertain systematic affinities, but probably close to the limbed snake Najash rionegrina. Although the material is very fragmentary and the systematic assignment is still unresolved, this snake represents the oldest, as well as probably the most primitive snake from Brazil.

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Hematopoiesis in snakes [Ophidia]

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Dabrowski Z., Tabarowski Z., Sano-Martins I. S., Spadacci-Morena D. D., Witkowska-Pelc E., Krzysztofowicz E., Spodaryk K.

Folia Histochemica et Cytobiologica

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2002

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tom 40

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nr 2

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Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis

80%

Scanlon J. D.

Acta Palaeontologica Polonica

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2005

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tom 50

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nr 1

New material and additional morphological details of a rare and phylogenetically significant large fossil snake, Wonambi naracoortensis Smith, 1976, are described from Pleistocene and Pliocene cave deposits in southern South Australia. The new data refute some previous interpretations of the morphology of this species, and have implications for the phylogenetic position of Wonambi relative to extant snakes and other fossils, including other Madtsoiidae. The nature of contacts among palatal, braincase, snout, and mandibular elements imply similar functional attributes to those of extant anilioid snakes: maxillae from multiple individuals show corrugated contact surfaces for the prefrontal, implying a tight suture; structures on the anterior and medial surfaces of the palatine choanal process are interpreted as forming extensive contacts with the vomer and parasphenoid; and the distinctly bounded facets on the basipterygoid processes and pterygoid imply little or no capacity for anteroposterior sliding of the palatopterygoid arch, hence absence of the macrostomatan “pterygoid walk”. On the frontal, interolfactory pillars were either absent or very slender, and a deep, sculptured contact surface for the nasal implies a prokinetic joint was also absent. Margins of the frontal and parietal indicate broad entry of the sphenoid into the ophthalmic fenestra, as in Dinilysia. Similarity of elements and features of the braincase (trigeminal foramen, ear region, and basipterygoid processes) with both lizards and extant snakes show that differences between snakes and other squamates have sometimes been overstated. The case for macrostomatan affinities of Wonambi is not supported by new evidence.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

1 Acta Parasitologica

1 Folia Histochemica et Cytobiologica

1 Albino A. M.

1 Dabrowski Z.

1 Hnida J. A.

1 Hsiou A. S.

1 Krzysztofowicz E.

1 McAllister C. T.

1 Medeiros M. A.

1 Robison H. W.

1 Sano-Martins I. S.

1 Santos R. A. B.

1 Scanlon J. D.

1 Spadacci-Morena D. D.

1 Spodaryk K.

1 Tabarowski Z.

1 Witkowska-Pelc E.

1 2018

1 2014

1 2005

1 2002

A new coccidian parasite (Apicomplexa: Eimeriidae: Eimeria) from the southern black racer, Coluber constrictor priapus (Reptilia: Ophidia: Colubridae) from Arkansas, USA

The oldest Brazilian snakes from the Cenomanian (early Late Cretaceous)

Hematopoiesis in snakes [Ophidia]

Cranial morphology of the Plio-Pleistocene giant madtsoiid snake Wonambi naracoortensis