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1
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Enamel microstructure of permanent and deciduous teeth of a species of notoungulate Toxodon : Development, functional, and evolutionary implications

100%
Braunn P. R., Ferigolo J., Ribeiro A. M.
Acta Palaeontologica Polonica
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2021
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tom 66
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nr 2
2

Chiroptera (Mammalia) from the Holocene of Rio Grande do Sul State, Brazil

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Hadler P., Ferigolo J., Ribeiro A. M.
Acta Chiropterologica
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2010
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tom 12
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nr 1
The Chiroptera do not have an extensive fossil record. To date, for the Quaternary of Brazil, only material from Minas Gerais, São Paulo, Bahia and Goiás States are known. For Rio Grande do Sul State, in contrast to the studies about the Pleistocene megafauna, little is known about Holocene small mammals, this being the first contribution about the Chiroptera of this age found in Rio Grande do Sul. The material was excavated from two archaeological sites, dating from ± 9,400 yrs BP to ± 4,250 yrs BP. The taxa recorded were: Chrotopterus auritus, Pygoderma bilabiatum (Phyllostomidae); Eptesicus brasiliensis, E. fuscus, Myotis cf. Myotis ruber, Vespertilionidae aff. Lasiurus (Vespertilionidae); Tadarida brasiliensis, and Molossus molossus (Molossidae). The presence of E. fuscus extends its Holocene distribution far southwards into the south temperate zone; its previous Quaternary occurrences were in Bahia State, Brazil, as well as in Venezuela, Mexico and the USA.
3
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Reappraisal of the south American Miocene snakes of the genus Colombophis, with description of a new species

100%
Hsiou A. S., Albino A. M., Ferigolo J.
Acta Palaeontologica Polonica
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2010
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tom 55
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nr 3
365-379
A redescription of the extinct snake genus Colombophis is presented, on the basis of new specimens from the late Miocene of southwestern Brazilian Amazonia, and those previously reported for the middle Miocene of Colombia and Venezuela. The reappraisal of Colombophis allows the recognition of a new species,C. spinosussp. nov. The revised diagnosis of the genus is based on the midtrunk vertebrae, distinct from those of other snakes mainly in the features of the neural arch, position and shape of the neural spine, inclination of the zygapophyses, shape of the centrum, and development of the haemal keel. The affinities of Colombophis with “Anilioidea” are still unresolved; it is distinguished from all known extinct and extant “anilioids” due to its great vertebral size and the frequent presence of paracotylar foramina. The posterior paired apophyses of the haemal keel in some vertebrae, and the high neural spine of C. spinosus also contrast significantly with the “anilioid” genera, making the allocation of the genus into this probably paraphyletic group not well supported. Here, we recognized Colombophis as a basal alethinophidian of uncertain relationships.
4
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Isometry in mesosaurs: Implications for growth patterns in early amniotes

100%
Nunez Demarco P., Ferigolo J., Pineiro G.
Acta Palaeontologica Polonica
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2022
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tom 67
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nr 2
5
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New sauropodomorph and cynodont remains from the Late Triassic Sacisaurus site in southern Brazil and its stratigraphic position in the Norian Caturrita Formation

76%
Marsola J. C. A., Bittencourt J. S., Da Rosa A. A. S., Martinelli A. G., Ribeiro A. M., Ferigolo J., Langer M. C.
Acta Palaeontologica Polonica
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2018
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tom 63
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nr 4
Sacisaurus agudoensis is the only silesaurid known from the Triassic beds of the Santa Maria Supersequence and the correlation of its type locality to the other Triassic deposits of south Brazil has always been controversial. In an attempt to improve this, a handful of dinosaur and cynodont remains found associated to S. agudoensis are here described and compared. The anatomy of the sauropodomorph is more similar to that of Norian forms such as Pantydraco caducus and Unaysaurus tolentinoi than to that of Carnian taxa such as Saturnalia tupiniquim and Pampadromaeus barberenai. The cynodonts recovered based on isolated teeth include a brasilodontid and a Riograndia-like form. This assemblage is consistent with a Norian age, as is also suggested by local stratigraphic correlation, which positions the site in the Caturrita Formation.
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