Ben Creisler
New pseudosuchianÂpapers...
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Aphaurosuchus escharafacies gen. et. sp. nov.
Gustavo Darlim, Felipe C. Montefeltro & Max C. Langer (2021)
3D skull modelling and description of a new baurusuchid (Crocodyliformes, Mesoeucrocodylia) from the Late Cretaceous (Bauru Basin) of Brazil.
Journal of Anatomy (advance online publication)
doi:
https://doi.org/10.1111/joa.13442https://onlinelibrary.wiley.com/doi/10.1111/joa.13442Baurusuchidae is one of the most diverse groups of South American notosuchians, unambiguously recorded in Late Cretaceous deposits of Brazil and Argentina. The group is characterized by a reduced tooth formula, a lateromedially compressed rostrum, and a verticalized quadrate, representing one of the top predators of their faunas. Historically, skull morphology is the most employed tool to investigate the relationships of baurusuchids, as most of the species have been primarily based on cranial remains. The present study describes a new baurusuchid species from the Bauru Basin of Brazil, based on the first tridimensional digital reconstruction of individualized skull bones for Notosuchia, and discusses its phylogenetic position within the group. The new species differs from all the other known baurusuchids by a depression on the posterior portion of the nasal bearing a crest, an infraorbital crest of the jugal that extends until the anterior margin of the lacrimal, the dorsal surface of the frontal lacking a longitudinal crest or depression, and the lateral convexity of the squamosal prongs participating in the occipital wall. The new taxon is consistently positioned as sister to the remaining baurusuchines, with Aplestosuchus sordidus and Stratiotosuchus maxhechti, as successive sisterâtaxa to a monophyletic Baurusuchus (Ba. albertoi, Ba. Salgadoensis, and Ba. pachecoi). Our updated phylogenetic analysis helps to differentiate the two major Baurusuchidae lineages, Baurusuchinae and Pissarrachampsinae. Yet, the new species shares morphological features with both groups, suggesting the occurrence of "Zones of Variability" in the radiation of Baurusuchidae.
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Not yet mentioned:
Wolfgang Schirmer & Hendrik Klein (2021)
Chirotherien-FÃhrten aus der RÃt-Formation von der klassischen LokalitÃt Gambach, Unterfranken
[Chirothere footprints from the Roet Formation at the classical locality Gambach, Lower Franconia, Germany]
Jahresberichte und Mitteilungen des Oberrheinischen Geologischen Vereins Band 103: 299 - 317 (in German)
DOI: 10.1127/jmogv/103/0010
https://www.schweizerbart.de/papers/jber_oberrh/detail/103/97139/Chirotherien_Fahrten_aus_der_Rot_Formation_von_der_klassischen_Lokalitat_Gambach_UnterfrankenTwo Chirothere footprints from the "FrÃnkischer Chirotheriensandstein" (Upper Buntsandstein, Middle Triassic, Anisium) at the Gambach locality in Lower Franconia, Germany, are described for the first time. These are the only existing fossil specimens from the location, which for decades yielded a famous tetrapod ichnofauna. Other material seems lost, its documentation being restricted to very few photographs and short notes in the classical literature. The footprints are assigned to Chirotheriidae cf. Chirotherium barthii Kaup 1835 and match the present knowledge about trackmakers that are considered to be basal archosaurs. The paper includes an historical overview of different stratigraphy and footprint discoveries of the Gambach succession.
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