Ben Creisler
Some recent papers:
Free pdf:
Carlos Roberto Candeiro, Stephen Brusatte, Glayce Queiroz, Adelino Carvalho, DÃbora Maia, Tamires Dias, Luciano Vidal, Musa Maria Nogueira Gomes & Lucas Marques Barros (2020)
Late Cretaceous Bauru Group biota from Southern GoiÃs state, Brazil: history and fossil content.
Biota del Grupo Bauru del CretÃcico TardÃo del estado de GoiÃs Sur, Brasil: historia y contenido fÃsil.
Earth Sciences Research Journal 24(4): 387-306
DOI:
https://doi.org/10.15446/esrj.v24n4.82831https://revistas.unal.edu.co/index.php/esrj/article/view/82831
The southern GoiÃs state region of Central Brazil has an extensive and informative record of fossil biota. Particularly over the last five years, there has been a great increase in fossil finds, which has enabled a greater understanding of this region's fauna and flora during the Late Cretaceous. In this article, we provide an updated synthesis of the biota from the Cretaceous of the southern GoiÃs state, the record of plants, gastropods, turtles, crocodilians, titanosaurs, and theropod dinosaurs.
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GÃbor Botfalvai, ZoltÃn Csiki-Sava, LÃszlà Kocsis, GÃspÃr Albert, JÃnos Magyar, Emese R. Bodor, Daniel ÅabÄrÄ, Alexey Ulyanov & LÃszlà MakÃdi (2021)
âXâ marks the spot! Sedimentological, geochemical and palaeontological investigations of Upper Cretaceous (Maastrichtian) vertebrate fossil localities from the VÄlioara valley (DensuÅ-ciula formation, HaÈeg basin, Romania)
Cretaceous Research 104781 (advance online publication)
doi:
https://doi.org/10.1016/j.cretres.2021.104781https://www.sciencedirect.com/science/article/abs/pii/S0195667121000288Highlights
GIS and REE geochemistry analyses reveal origin of unprovenanced museum fossils.
Type localities of titanosaur Magyarosaurus, eusuchian Allodaposuchus are relocated.
New well-preserved and diverse Maastrichtian vertebrate remains were collected.
These fossils represent one the oldest faunal assemblages from the HaÅeg Basin.
The palaeoenvironment of this fauna is an otherwise rare, wetland-type floodplain.
Abstract
At the beginning of the 20th century, the Croatian-Hungarian palaeontologist OttokÃr KadiÄ discovered a rich Late Cretaceous vertebrate assemblage around VÄlioara in the HaÅeg Basin, including fossils of several dinosaurs and the lectotype of the eusuchian Allodaposuchus. These fossils were collected from seven main localities and have been housed in the collections of the Mining and Geological Survey of Hungary. However, the collection was mixed after World War II, and this unprovenanced material currently cannot be used for palaeoecological investigations. Nevertheless, the map marking the location of KadiÄâs sites has been recently uncovered, showing the positions of the fossiliferous localities, which allows matching these with the historically collected specimens using geochemistry. Based on KadiÄâs map, we georeferenced, relocated, and re-excavated these vertebrate-bearing outcrops, and documented their sedimentological context. Detailed stratigraphical investigations of the exposed successions indicate that this VÄlioara material represents one of the oldest (=earliest Maastrichtian) Late Cretaceous faunal assemblages known from the HaÅeg Basin. The vertebrate remains collected during our new excavations around VÄlioara represent turtles (Kallokibotion), crocodyliforms (Allodaposuchus, Doratodon, âTheriosuchusâ, Acynodon), dinosaurs (Zalmoxes, Telmatosaurus, titanosaurs, theropods), and mammals. In order to determine potential geochemical differences among the sites, we selected several specimens with recorded stratigraphic position, measured their trace element compositions, and used these as independent proxies to assess the probable stratigraphic origin of the historical vertebrate fossils. Our detailed sedimentological, geochemical and palaeontological investigations around VÄlioara contribute to a deeper understanding of the distribution, evolution and palaeoecology of the HaÅeg vertebrate faunas during the latest Cretaceous.
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