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Journal articles on the topic 'Abelisaurus'

Author: Grafiati

Published: 4 June 2021

Last updated: 16 February 2022

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1

Coria, Rodolfo A., Philip J. Currie, and Ariana Paulina Carabajal. "A new abelisauroid theropod from northwestern Patagonia." Canadian Journal of Earth Sciences 43, no. 9 (September 1, 2006): 1283–89. http://dx.doi.org/10.1139/e06-025.

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The Argentinean record of abelisauroid theropods begins in the Early Cretaceous (Ligabueino) and spans most of the Late Cretaceous, from Cenomanian (Ilokelesia, Xenotarsosaurus, and Ekrixinatosaurus) to Campanian–Maastrichtian (Abelisaurus, Carnotaurus, Aucasaurus, and Noasaurus). A fragmentary specimen of a theropod dinosaur was collected in 2000 from the middle section of the Lisandro Formation (Turonian?) at Cerro Bayo Mesa, Neuquén Province, Argentina. The fossil-bearing level, which is part of the Lisandro Formation that also yielded the remains of the basal ornithopod Anabisetia saldiviai, corresponds to a reddish, massive mudstone linked with fluvial channel deposits. The theropod identified as MCF-PVPH-237 is an abelisauroid theropod that increases our knowledge about the evolution of South American Abelisauroidea and is the first record of this clade from the Lisandro Formation.

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2

DELCOURT, RAFAEL. "Revised morphology of Pycnonemosaurus nevesi Kellner & Campos, 2002 (Theropoda: Abelisauridae) and its phylogenetic relationships." Zootaxa 4276, no. 1 (June 9, 2017): 1. http://dx.doi.org/10.11646/zootaxa.4276.1.1.

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Abelisaurid theropods were most abundant in the Gondwana during the Cretaceous Period. Pycnonemosaurus nevesi Kellner & Campos, 2002 was the first abelisaurid dinosaur described from the Bauru Group (Brazil, Upper Cretaceous). Nevertheless, its initial description was based on the comparison of a restricted number of remains with other abelisaurids. In this paper, I present a new description of the morphology of Pycnonemosaurus nevesi, including three new caudal transverse processes and a discussion of several new characteristics based on perspectives derived from recently described abelisauroids. Pycnonemosaurus nevesi differs from other abelisaurids based on the following features: a pubis with a small rounded foot and a ventrally-bowed anterior distal end; posterior caudal vertebrae with a hook-shaped transverse process that has an anterodistal expansion that is short and bowed; a strong and massive tibia with a well-developed lateral malleolus that is ventrally expanded. The unfused sutures represent signs of skeletal immaturity, but the specific ontogenetic stage is still uncertain. The current phylogenetic analysis suggests strongly relationship within Pycnonemosaurus and the most-derived abelisaurids (e.g Carnotaurus and Aucasaurus).

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3

Pol, Diego, and Oliver W. M. Rauhut. "A Middle Jurassic abelisaurid from Patagonia and the early diversification of theropod dinosaurs." Proceedings of the Royal Society B: Biological Sciences 279, no. 1741 (May 23, 2012): 3170–75. http://dx.doi.org/10.1098/rspb.2012.0660.

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Abelisaurids are a clade of large, bizarre predatory dinosaurs, most notable for their high, short skulls and extremely reduced forelimbs. They were common in Gondwana during the Cretaceous, but exceedingly rare in the Northern Hemisphere. The oldest definitive abelisaurids so far come from the late Early Cretaceous of South America and Africa, and the early evolutionary history of the clade is still poorly known. Here, we report a new abelisaurid from the Middle Jurassic of Patagonia, Eoabelisaurus mefi gen. et sp. nov., which predates the so far oldest known secure member of this lineage by more than 40 Myr. The almost complete skeleton reveals the earliest evolutionary stages of the distinctive features of abelisaurids, such as the modification of the forelimb, which started with a reduction of the distal elements. The find underlines the explosive radiation of theropod dinosaurs in the Middle Jurassic and indicates an unexpected diversity of ceratosaurs at that time. The apparent endemism of abelisauroids to southern Gondwana during Pangean times might be due to the presence of a large, central Gondwanan desert. This indicates that, apart from continent-scale geography, aspects such as regional geography and climate are important to reconstruct the biogeographical history of Mesozoic vertebrates.

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4

Chiarenza, Alfio Alessandro, and Andrea Cau. "A large abelisaurid (Dinosauria, Theropoda) from Morocco and comments on the Cenomanian theropods from North Africa." PeerJ 4 (February 29, 2016): e1754. http://dx.doi.org/10.7717/peerj.1754.

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We describe the partially preserved femur of a large-bodied theropod dinosaur from the Cenomanian “Kem Kem Compound Assemblage” (KKCA) of Morocco. The fossil is housed in the Museo Geologico e Paleontologico “Gaetano Giorgio Gemmellaro” in Palermo (Italy). The specimen is compared with the theropod fossil record from the KKCA and coeval assemblages from North Africa. The combination of a distally reclined head, a not prominent trochanteric shelf, distally placed lesser trochanter of stout, alariform shape, a stocky shaft with the fourth trochanter placed proximally, and rugose muscular insertion areas in the specimen distinguishes it fromCarcharodontosaurus,DeltadromeusandSpinosaurusand supports referral to an abelisaurid. The estimated body size for the individual from which this femur was derived is comparable toCarnotaurusandEkrixinatosaurus(up to 9 meters in length and 2 tons in body mass). This find confirms that abelisaurids had reached their largest body size in the “middle Cretaceous,” and that large abelisaurids coexisted with other giant theropods in Africa. We review the taxonomic status of the theropods from the Cenomanian of North Africa, and provisionally restrict the Linnean binominaCarcharodontosaurus iguidensisandSpinosaurus aegyptiacusto the type specimens. Based on comparisons among the theropod records from the Aptian-Cenomanian of South America and Africa, a partial explanation for the so-called “Stromer’s riddle” (namely, the coexistence of many large predatory dinosaurs in the “middle Cretaceous” record from North Africa) is offered in term of taphonomic artifacts among lineage records that were ecologically and environmentally non-overlapping. Although morphofunctional and stratigraphic evidence supports an ecological segregation between spinosaurids and the other lineages, the co-occurrence of abelisaurids and carcharodontosaurids, two groups showing several craniodental convergences that suggest direct resource competition, remains to be explained.

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5

Hassler, A., J. E. Martin, R. Amiot, T. Tacail, F. Arnaud Godet, R. Allain, and V. Balter. "Calcium isotopes offer clues on resource partitioning among Cretaceous predatory dinosaurs." Proceedings of the Royal Society B: Biological Sciences 285, no. 1876 (April 11, 2018): 20180197. http://dx.doi.org/10.1098/rspb.2018.0197.

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Large predators are overabundant in mid-Cretaceous continental dinosaur assemblages of North Africa. Such unbalanced ecosystem structure involves, among predatory dinosaurs, typical abelisaurid or carcharodontosaurid theropods co-occurring with long-snouted spinosaurids of debated ecology. Here, we report calcium (Ca) isotope values from tooth enamel (expressed as δ 44/42 Ca) to investigate resource partitioning in mid-Cretaceous assemblages from Niger (Gadoufaoua) and Morocco (Kem Kem Beds). In both assemblages, spinosaurids display a distinct isotopic signature, the most negative in our dataset. This distinct taxonomic clustering in Ca isotope values observed between spinosaurids and other predators provides unambiguous evidence for niche partitioning at the top of the trophic chains: spinosaurids foraged on aquatic environments while abelisaurid and carcharodontosaurid theropods relied almost exclusively on terrestrial resources.

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6

Russell, Dale A. "China and the lost worlds of the dinosaurian era." Paleontological Society Special Publications 6 (1992): 257. http://dx.doi.org/10.1017/s2475262200008170.

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What is known of dinosaurian biogeography suggests a centre of evolution first on a fragmenting Pangea-Gondwana and then on a consolidating Laurasia. By Cretaceous time members of Gondwanan low-latitude abelisaur-titanosaur assemblages often bore “back-fans,” while those in polar latitudes were relictual and/or highly derived. The time of last contact between South America and Africa is not well constrained, but links to Antarctica continued beyond the end of the Cretaceous. Many Gondwanan tetrapods appear to have waif-dispersed to Laurasia across southern Europe; few crossed in the opposite direction until the end of the period. Laurasian assemblages were then typically dominated by tyrannosaurids and hadrosaurids.Land masses (“lost worlds”) periodically became isolated from Gondwana-Laurasia. (1) Eastern Asia was isolated between middle Jurassic through Neocomian time, although related temnospondyls and carnosaurs may have co-existed in Austral regions. Mamenchisaurs were the dominant giant terrestrial herbivores, while whip-tailed diplodocids filled the same role in Pangea. Groups of European-North American affinity then replaced many Asian endemics in a manner reminiscent of the Neogene mammalian turnover in South America. (2) In North America. Late Jurassic dinosaur assemblages exhibited Gondwana affinities, but by Late Cretaceous time they were dominated by forms of Asian ancestry. The apparent low diversity of Aptian-Albian dinosaur assemblages and absence of well-marked endemism may have been the result of a brief period of isolation. (3) European archipelagos were a filter bridge between northern lands and Gondwana analogous to the East Indies, which separate comparably different modern biotas in southeast Asia and Australia. (4) During Barremian time India probably hosted an polar dinosaurian assemblage, but low-latitude Gondwana forms (abelisaurids, titanosaurids) were present during at least part of this interval. Isolation ended with the immigration of northern taxa in Maestrichtian time.Underexplored Mesozoic horizons of great biogeographic interest include (1) the Middle Jurassic-Neocomian of China for microvertebrate materials, (2) the pre-Maestrichtian Cretaceous of India, and (3) the post-Cenomanian of Africa, Australia and Antarctica. Paradoxically, the two recently discovered dinosaurian specimens of the latter age in Antarctica, which represent about as much biogeographic information as all described materials of similar age from Africa combined (none are known from Australia), are presently referred to families with Laurasian distributions.

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7

Méndez, Ariel H., Fernando E. Novas, and Sankar Chatterjee. "An abelisaurid humerus from the Upper Cretaceous of India." Paläontologische Zeitschrift 84, no. 3 (February 3, 2010): 421–25. http://dx.doi.org/10.1007/s12542-010-0055-z.

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8

PAULINA CARABAJAL, ARIANA. "Braincases of abelisaurid theropods from the Upper Cretaceous of north Patagonia." Palaeontology 54, no. 4 (May 30, 2011): 793–806. http://dx.doi.org/10.1111/j.1475-4983.2011.01055.x.

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9

Méndez, Ariel H., Fernando E. Novas, and Sankar Chatterjee. "Erratum to: An abelisaurid humerus from the Upper Cretaceous of India." Paläontologische Zeitschrift 85, no. 1 (July 2, 2010): 113. http://dx.doi.org/10.1007/s12542-010-0077-6.

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10

Gianechini, Federico A., Sebastián Apesteguía, Walter Landini, Franco Finotti, Rubén Juárez Valieri, and Fabiana Zandonai. "New abelisaurid remains from the Anacleto Formation (Upper Cretaceous), Patagonia, Argentina." Cretaceous Research 54 (May 2015): 1–16. http://dx.doi.org/10.1016/j.cretres.2014.11.009.

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11

LE LOEUFF, JEAN, EDDY MÉTAIS, DIDIER B. DUTHEIL, JEAN LOUP RUBINO, ERIC BUFFETAUT, FRANÇOIS LAFONT, LIONEL CAVIN, et al. "An Early Cretaceous vertebrate assemblage from the Cabao Formation of NW Libya." Geological Magazine 147, no. 5 (March 10, 2010): 750–59. http://dx.doi.org/10.1017/s0016756810000178.

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AbstractFossil vertebrates from the Cabao Formation discovered in the area of Nalut in northwestern Libya include the hybodont shark Priohybodus, the crocodilian Sarcosuchus, an abelisaurid, a baryonichine spinosaurid and a large sauropod with spatulate teeth. The Cabao Formation may be Hauterivian to Barremian in age, although an earlier Berriasian to Valanginian age cannot be excluded. Its dinosaur assemblage is reminiscent of that of the El Rhaz and Tiouraren formations of Niger and strongly differs from both the Cenomanian assemblages of Morocco and Egypt and the Late Aptian to Albian fauna of Tunisia. Fossil vertebrates may be an important tool to establish the stratigraphical framework of the poorly dated Early Cretaceous continental deposits of Africa.

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12

Lamanna, Matthew C., Rubén D. Martínez, and Joshua B. Smith. "A definitive abelisaurid theropod dinosaur from the early Late Cretaceous of Patagonia." Journal of Vertebrate Paleontology 22, no. 1 (March 14, 2002): 58–69. http://dx.doi.org/10.1671/0272-4634(2002)022[0058:adatdf]2.0.co;2.

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13

Cerroni, Mauricio A., and Ariana Paulina-Carabajal. "Novel information on the endocranial morphology of the abelisaurid theropod Carnotaurus sastrei." Comptes Rendus Palevol 18, no. 8 (December 2019): 985–95. http://dx.doi.org/10.1016/j.crpv.2019.09.005.

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14

Smith, Joshua B., and Matthew C. Lamanna. "An abelisaurid from the Late Cretaceous of Egypt: implications for theropod biogeography." Naturwissenschaften 93, no. 5 (March 16, 2006): 242–45. http://dx.doi.org/10.1007/s00114-006-0092-3.

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15

Novas, Fernando E., Ismar de Souza Carvalho, Luiz Carlos Borges Ribeiro, and Ariel H. Méndez. "First abelisaurid bone remains from the Maastrichtian Marília Formation, Bauru Basin, Brazil." Cretaceous Research 29, no. 4 (August 2008): 625–35. http://dx.doi.org/10.1016/j.cretres.2008.01.010.

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16

Longrich, Nicholas R., Xabier Pereda-Suberbiola, Nour-Eddine Jalil, Fatima Khaldoune, and Essaid Jourani. "An abelisaurid from the latest Cretaceous (late Maastrichtian) of Morocco, North Africa." Cretaceous Research 76 (August 2017): 40–52. http://dx.doi.org/10.1016/j.cretres.2017.03.021.

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17

Iori, Fabiano Vidoi, Hermínio Ismael de Araújo-Júnior, Sandra A. Simionato Tavares, Thiago da Silva Marinho, and Agustín G. Martinelli. "New theropod dinosaur from the Late Cretaceous of Brazil improves abelisaurid diversity." Journal of South American Earth Sciences 112 (December 2021): 103551. http://dx.doi.org/10.1016/j.jsames.2021.103551.

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18

Sereno, Paul C., and Stephen L. Brusatte. "Basal Abelisaurid and Carcharodontosaurid Theropods from the Lower Cretaceous Elrhaz Formation of Niger." Acta Palaeontologica Polonica 53, no. 1 (January 2008): 15–46. http://dx.doi.org/10.4202/app.2008.0102.

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19

Smith, Joshua B., and Fabio M. Dalla Vecchia. "An abelisaurid (Dinosauria: Theropoda) tooth from the Lower Cretaceous Chicla formation of Libya." Journal of African Earth Sciences 46, no. 3 (October 2006): 240–44. http://dx.doi.org/10.1016/j.jafrearsci.2006.05.007.

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20

Tortosa, Thierry, Eric Buffetaut, Nicolas Vialle, Yves Dutour, Eric Turini, and Gilles Cheylan. "A new abelisaurid dinosaur from the Late Cretaceous of southern France: Palaeobiogeographical implications." Annales de Paléontologie 100, no. 1 (January 2014): 63–86. http://dx.doi.org/10.1016/j.annpal.2013.10.003.

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21

Novas, Fernando E., Diego Pol, Juan I. Canale, Juan D. Porfiri, and Jorge O. Calvo. "A bizarre Cretaceous theropod dinosaur from Patagonia and the evolution of Gondwanan dromaeosaurids." Proceedings of the Royal Society B: Biological Sciences 276, no. 1659 (December 16, 2008): 1101–7. http://dx.doi.org/10.1098/rspb.2008.1554.

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Fossils of a predatory dinosaur provide novel information about the evolution of unenlagiines, a poorly known group of dromaeosaurid theropods from Gondwana. The new dinosaur is the largest dromaeosaurid yet discovered in the Southern Hemisphere and depicts bizarre cranial and postcranial features. Its long and low snout bears numerous, small-sized conical teeth, a condition resembling spinosaurid theropods. Its short forearms depart from the characteristically long-armed condition of all dromaeosaurids and their close avian relatives. The new discovery amplifies the range of morphological disparity among unenlagiines, demonstrating that by the end of the Cretaceous this clade included large, short-armed forms alongside crow-sized, long-armed, possibly flying representatives. The new dinosaur is the youngest record of dromaeosaurids from Gondwana and represents a previously unrecognized lineage of large predators in Late Cretaceous dinosaur faunas mainly dominated by abelisaurid theropods.

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22

Canale, Juan I., Ignacio Cerda, Fernando E. Novas, and Alejandro Haluza. "Small-sized abelisaurid (Theropoda: Ceratosauria) remains from the Upper Cretaceous of northwest Patagonia, Argentina." Cretaceous Research 62 (July 2016): 18–28. http://dx.doi.org/10.1016/j.cretres.2016.02.001.

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23

Filippi, Leonardo S., Ariel H. Méndez, Rubén D. Juárez Valieri, and Alberto C. Garrido. "A new brachyrostran with hypertrophied axial structures reveals an unexpected radiation of latest Cretaceous abelisaurids." Cretaceous Research 61 (June 2016): 209–19. http://dx.doi.org/10.1016/j.cretres.2015.12.018.

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24

Martinelli, Agustín G., Thiago S. Marinho, Federico Brisson Egli, E. Martín Hechenleitner, Fabiano V. Iori, Fábio H. Veiga, Giorgio Basilici, Marcus V. T. Soares, André Marconato, and Luiz C. B. Ribeiro. "Noasaurid theropod (Abelisauria) femur from the Upper Cretaceous Bauru Group in Triângulo Mineiro (Southeastern Brazil)." Cretaceous Research 104 (December 2019): 104181. http://dx.doi.org/10.1016/j.cretres.2019.07.011.

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25

Holtz, Thomas R. "Endemicity analysis of global Cretaceous dinosaurian faunas." Paleontological Society Special Publications 6 (1992): 132. http://dx.doi.org/10.1017/s2475262200006924.

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It has often been assumed that the intensively studied dinosaur faunal assemblages of western North America and the Gobi Desert of Mongolia and China represent “typical” Late Cretaceous terrestrial vertebrate communities. This assumption has led to a paleoecological scenario in which a global ecological shift occurs from the dominance of high-browsing saurischian (i.e., sauropod) to low-browsing ornithischian (i.e., iguanodontian, marginocephalian, ankylosaurian) herbivore communities. Furthermore, the assumption that the Asiamerican dinosaur faunas are communities “typical” of the Late Cretaceous has forced the conclusion that the sauropod-dominated Argentine population must have been an isolated relict ecosystem of primitive taxa (i.e., titanosaurid sauropods, abelisaurid ceratosaurs). Recent discoveries and reinterpretations of other Late Cretaceous assemblages, however, seriously challenge these assumptions.Paleogeography and paleobiogeography have demonstrated that terrestrial landmasses became progressively fractionated from the Late Jurassic (Kimmeridgian-Tithonian) to the Late Cretaceous (Campanian), owing to continental drift and the development of large epicontinental seas (the Western Interior Seaway, the Turgai Sea, etc.). The Maastrichtian regressions resulted in the reestablishment of land connection between long isolated regions (for example, western and eastern North America). These geographic changes are reflected in changes in the dinosaurian faunas. These assemblages were rather cosmopolitan in the Late Jurassic (Morrison, Tendaguru, and Upper Shaximiao Formations) but became more provincialized throughout the Cretaceous.Cluster analysis of presence/absence data for the theropod, sauropod, and ornithischian clades indicates that previous assumptions for Late Cretaceous dinosaurian paleoecology are largely in error. These analyses instead suggest that sauropod lineages remained a major faunal component in both Laurasia (Europe, Asia) and Gondwana (South America, Africa, India, and Australia). Only the pre-Maastrichtian Senonian deposits of North America were lacking sauropodomorphs. Furthermore, the abelisaurid/titanosaurid fauna of Argentina is, in fact, probably more typical of Late Cretaceous dinosaurian communities. Rather, it is the coelurosaurian/ornithischian communities of Asiamerica (and particularly North America) that are composed primarily of dinosaurs of small geographic distribution. Thus, the Judithian, Edmontonian, and Lancian faunas, rather than being typical of the Late Cretaceous, most likely represent an isolated island-continent terrestrial vertebrate population, perhaps analogous to the extremely isolated vertebrate communities of Tertiary South America. Furthermore, the shift from high-browsing to low-browsing herbivore “dynasties” more likely represents a local event in Senonian North America and does not represent a global paleoecological transformation of Late Cretaceous dinosaur community structure.

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Cerroni, M. A., M. J. Motta, F. L. Agnolín, A. M. Aranciaga Rolando, F. Brissón Egli, and F. E. Novas. "A new abelisaurid from the Huincul Formation (Cenomanian-Turonian; Upper Cretaceous) of Río Negro province, Argentina." Journal of South American Earth Sciences 98 (March 2020): 102445. http://dx.doi.org/10.1016/j.jsames.2019.102445.

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27

RUIZ, JAVIER, ANGÉLICA TORICES, HUMBERTO SERRANO, and VALLE LÓPEZ. "The hand structure of Carnotaurus sastrei (Theropoda, Abelisauridae): implications for hand diversity and evolution in abelisaurids." Palaeontology 54, no. 6 (September 19, 2011): 1271–77. http://dx.doi.org/10.1111/j.1475-4983.2011.01091.x.

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28

Zitouni, Slimane, Christian Laurent, Gareth Dyke, and Nour-Eddine Jalil. "An abelisaurid (Dinosauria: Theropoda) ilium from the Upper Cretaceous (Cenomanian) of the Kem Kem beds, Morocco." PLOS ONE 14, no. 4 (April 2, 2019): e0214055. http://dx.doi.org/10.1371/journal.pone.0214055.

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29

Burch, Sara H., and Matthew T. Carrano. "An articulated pectoral girdle and forelimb of the abelisaurid theropodMajungasaurus crenatissimusfrom the Late Cretaceous of Madagascar." Journal of Vertebrate Paleontology 32, no. 1 (January 2012): 1–16. http://dx.doi.org/10.1080/02724634.2012.622027.

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Canale, Juan I., Carlos A. Scanferla, Federico L. Agnolin, and Fernando E. Novas. "New carnivorous dinosaur from the Late Cretaceous of NW Patagonia and the evolution of abelisaurid theropods." Naturwissenschaften 96, no. 3 (December 5, 2008): 409–14. http://dx.doi.org/10.1007/s00114-008-0487-4.

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31

Hendrickx, Christophe, and Phil R. Bell. "The scaly skin of the abelisaurid Carnotaurus sastrei (Theropoda: Ceratosauria) from the Upper Cretaceous of Patagonia." Cretaceous Research 128 (December 2021): 104994. http://dx.doi.org/10.1016/j.cretres.2021.104994.

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32

Ibrahim, Nizar, Paul C. Sereno, David J. Varricchio, David M. Martill, Didier B. Dutheil, David M. Unwin, Lahssen Baidder, Hans C. E. Larsson, Samir Zouhri, and Abdelhadi Kaoukaya. "Geology and paleontology of the Upper Cretaceous Kem Kem Group of eastern Morocco." ZooKeys 928 (April 21, 2020): 1–216. http://dx.doi.org/10.3897/zookeys.928.47517.

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The geological and paleoenvironmental setting and the vertebrate taxonomy of the fossiliferous, Cenomanian-age deltaic sediments in eastern Morocco, generally referred to as the “Kem Kem beds”, are reviewed. These strata are recognized here as the Kem Kem Group, which is composed of the lower Gara Sbaa and upper Douira formations. Both formations have yielded a similar fossil vertebrate assemblage of predominantly isolated elements pertaining to cartilaginous and bony fishes, turtles, crocodyliforms, pterosaurs, and dinosaurs, as well as invertebrate, plant, and trace fossils. These fossils, now in collections around the world, are reviewed and tabulated. The Kem Kem vertebrate fauna is biased toward large-bodied carnivores including at least four large-bodied non-avian theropods (an abelisaurid, Spinosaurus, Carcharodontosaurus, and Deltadromeus), several large-bodied pterosaurs, and several large crocodyliforms. No comparable modern terrestrial ecosystem exists with similar bias toward large-bodied carnivores. The Kem Kem vertebrate assemblage, currently the best documented association just prior to the onset of the Cenomanian-Turonian marine transgression, captures the taxonomic diversity of a widespread northern African fauna better than any other contemporary assemblage from elsewhere in Africa.

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Aranciaga Rolando, Mauro, Mauricio A. Cerroni, Jordi A. Garcia Marsà, Federico l. Agnolín, Matías J. Motta, Sebastián Rozadilla, Federico Brisson Eglí, and Fernando E. Novas. "A new medium-sized abelisaurid (Theropoda, Dinosauria) from the late cretaceous (Maastrichtian) Allen Formation of Northern Patagonia, Argentina." Journal of South American Earth Sciences 105 (January 2021): 102915. http://dx.doi.org/10.1016/j.jsames.2020.102915.

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34

Persons, W. Scott, and Philip J. Currie. "Dinosaur Speed Demon: The Caudal Musculature of Carnotaurus sastrei and Implications for the Evolution of South American Abelisaurids." PLoS ONE 6, no. 10 (October 17, 2011): e25763. http://dx.doi.org/10.1371/journal.pone.0025763.

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35

Bittencourt, Jonathas S., and Max C. Langer. "Mesozoic dinosaurs from Brazil and their biogeographic implications." Anais da Academia Brasileira de Ciências 83, no. 1 (March 2011): 23–60. http://dx.doi.org/10.1590/s0001-37652011000100003.

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The record of dinosaur body-fossils in the Brazilian Mesozoic is restricted to the Triassic of Rio Grande do Sul and Cretaceous of various parts of the country. This includes 21 named species, two of which were regarded as nomina dubia, and 19 consensually assigned to Dinosauria. Additional eight supraspecific taxa have been identified based on fragmentary specimens and numerous dinosaur footprints known in Brazil. In fact, most Brazilian specimens related to dinosaurs are composed of isolated teeth and vertebrae. Despite the increase of fieldwork during the last decade, there are still no dinosaur body-fossils of Jurassic age and the evidence of ornithischians in Brazil is very limited. Dinosaur faunas from this country are generally correlated with those from other parts of Gondwana throughout the Mesozoic. During the Late Triassic, there is a close correspondence to Argentina and other south-Pangaea areas. Mid-Cretaceous faunas of northeastern Brazil resemble those of coeval deposits of North Africa and Argentina. Southern hemisphere spinosaurids are restricted to Africa and Brazil, whereas abelisaurids are still unknown in the Early Cretaceous of the latter. Late Cretaceous dinosaur assemblages of south-central Brazil are endemic only to genus or, more conspicuously, to species level, sharing closely related taxa with Argentina, Madagascar, Indo-Pakistan and, to a lesser degree, continental Africa.

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Sales, Marcos A. F., Isabel A. P. de Oliveira, and Cesar L. Schultz. "The oldest abelisaurid record from Brazil and the palaeobiogeographic significance of mid-Cretaceous dinosaur assemblages from northern South America." Palaeogeography, Palaeoclimatology, Palaeoecology 508 (November 2018): 107–15. http://dx.doi.org/10.1016/j.palaeo.2018.07.024.

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Martinelli, Agustín G., Thiago S. Marinho, Fabiano V. Iori, and Luiz Carlos B. Ribeiro. "The firstCaipirasuchus(Mesoeucrocodylia, Notosuchia) from the Late Cretaceous of Minas Gerais, Brazil: new insights on sphagesaurid anatomy and taxonomy." PeerJ 6 (September 5, 2018): e5594. http://dx.doi.org/10.7717/peerj.5594.

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Field work conducted by the staff of the Centro de Pesquisas Paleontológicas Llewellyn Ivor Price of the Universidade Federal do Triângulo Mineiro since 2009 at Campina Verde municipality (MG) have resulted in the discovery of a diverse vertebrate fauna from the Adamantina Formation (Bauru Basin). The baurusuchidCampinasuchus diniziwas described in 2011 from Fazenda Três Antas site and after that, preliminary descriptions of a partial crocodyliform egg, abelisaurid teeth, and fish remains have been done. Recently, the fossil sample has been considerably increased including the discovery of several, partially articulated fish remains referred to Lepisosteiformes and an almost complete and articulated skeleton referred to a new species ofCaipirasuchus(Notosuchia, Sphagesauridae), which is the main subject of this contribution. At present, this genus was restricted to the Adamantina Formation cropping out in São Paulo state, with the speciesCaipirasuchus montealtensis,Caipirasuchus paulistanus, andCaipirasuchus stenognathus. The new material represents the holotype of a new species,Caipirasuchus mineirusn. sp., diferenciated from the previously ones due to the following traits: last two maxillary teeth located posterior to anterior edge of infraorbital fenestra, elongated lateroventral maxillo-jugal suture—about ½ the anteroposterior maxillar length—and contact between posterior crest of quadrate and posterior end of squamosal forming an almost 90° flaring roof of the squamosal, among others.C. mineiruswas found in the same outcrop thanCampinasuchusbut stratigraphically the former occurs in the lower portion of the section with no unambiguous data supporting the coexistance of both taxa.

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Brum, Arthur Souza, Elaine Batista Machado, Diogenes de Almeida Campos, and Alexander Wilhelm Armin Kellner. "Morphology and internal structure of two new abelisaurid remains (Theropoda, Dinosauria) from the Adamantina Formation (Turonian – Maastrichtian), Bauru Group, Paraná Basin, Brazil." Cretaceous Research 60 (May 2016): 287–96. http://dx.doi.org/10.1016/j.cretres.2015.11.013.

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Hendrickx, Christophe, and Phil Bell. "3D model related to the publication: The scaly skin of the abelisaurid Carnotaurus sastrei (Theropoda: Ceratosauria) from the Upper Cretaceous of Patagonia." MorphoMuseuM 7, no. 4 (August 14, 2021): e149. http://dx.doi.org/10.18563/journal.m3.149.

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EZCURRA, MARTÍN D., FEDERICO L. AGNOLIN, and FERNANDO E. NOVAS. "An abelisauroid dinosaur with a non-atrophied manus from the Late Cretaceous Pari Aike Formation of southern Patagonia." Zootaxa 2450, no. 1 (May 10, 2010): 1. http://dx.doi.org/10.11646/zootaxa.2450.1.1.

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We describe the new basal abelisauroid dinosaur Austrocheirus isasii gen. et sp. nov. from the Late Cretaceous Pari Aike Formation of southwestern Patagonia, Argentina. The preserved remains include manual bones, a distal tibia, and some pedal and axial elements. Austrocheirus is differentiated from other basal theropods by the presence of metacarpal III with a dorsoventrally compressed shaft and posteriorly displaced collateral tendon fossae located at the same level of the proximal end of distal condyles, and pedal phalanges with a conspicuous longitudinal crest delimitating the dorsal margin of the distal collateral tendon fossae. A cladistic analysis recovered the new species as more derived than Ceratosaurus and Berberosaurus, but within a polytomy at the base of Abelisauroidea, an assignment supported by two abelisauroid synapomorphies: distal end of tibia with a planar vertical scar for the reception of the ascending process of the astragalus that occupies most of its anterior surface and is medially bounded by the longitudinally oriented facet; and scar for the reception of the ascending process with a median vertical ridge, which imbeds into a crescentic vertical groove on the posterior surface of the ascending process of the astragalus forming an interlocking tibiotarsal articulation. Furthermore, Austrocheirus represents the first known medium-sized Late Cretaceous abelisauroid bearing nonatrophied hands. The evidence provided here suggests that the strong reduction of the forelimb recorded in derived abelisaurids is not directly correlated with their increased body-size, but it seems to be an evolutionary event exclusive to this lineage within Ceratosauria.

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Baiano, Mattia A., Rodolfo A. Coria, Juan I. Canale, and Federico A. Gianechini. "New abelisaurid material from the Anacleto Formation (Campanian, Upper Cretaceous) of Patagonia, Argentina, shed light on the diagnosis of the Abelisauridae (Theropoda, Ceratosauria)." Journal of South American Earth Sciences 110 (October 2021): 103402. http://dx.doi.org/10.1016/j.jsames.2021.103402.

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Paulina-Carabajal, Ariana, and Leonardo Filippi. "Neuroanatomy of the abelisaurid theropod Viavenator : The most complete reconstruction of a cranial endocast and inner ear for a South American representative of the clade." Cretaceous Research 83 (March 2018): 84–94. http://dx.doi.org/10.1016/j.cretres.2017.06.013.

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Pereda-Suberbiola, Xabier. "Biogeographical affinities of Late Cretaceous continental tetrapods of Europe: a review." Bulletin de la Société Géologique de France 180, no. 1 (January 1, 2009): 57–71. http://dx.doi.org/10.2113/gssgfbull.180.1.57.

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Abstract The continental tetrapod assemblages from the Santonian-Maastrichtian of Europe consist of dinosaurs (theropods: Abelisauroidea, Alvarezsauridae, Dromaeosauridae, ?Oviraptorosauria, ?Troodontidae, and birds: Enantiornithes, basal Ornithurae; sauropods: Titanosauria; ankylosaurs: Nodosauridae; ornithopods: Hadrosauridae, Rhabdodontidae; and neoceratopsians), pterosaurs (Azhdarchidae), crocodyliforms (eusuchians: Alligatoroidea, Gavialoidea, ?Hylaeochampsidae; sebecosuchian-like ziphosuchians; and, probably, basal neosuchians), choristoderes (?Champsosauridae), squamates (lacertilians: Iguanidae s.l., Paramacellodidae, Polyglyphanodontinae, Varanoidea; snakes: Madtsoiidae; possible amphisbaenians), turtles (cryptodires: Chelydroidea, Kallokibotionidae, Solemydidae; pleurodires: Bothremydidae, Dortokidae), lissamphibians (Albanerpetontidae; anurans: Discoglossidae, Palaeobatrachidae; caudates: Batrachosauroididae, Salamandridae), and mammals (multituberculates: Kogaionidae, ?“Paracimexomys group”; marsupials: Herpetotheriidae; eutherians: “Zhelestidae”). The palaeobiogeographical affinities of the Late Cretaceous continental tetrapods of Europe are complex. The faunas are commonly considered to show a mixed pattern resulting from the addition of “Asiamerican” and Gondwanan forms to European taxa. Albanerpetontids, both paramacellodid and polyglyphonodontine lizards, and hadrosaurid dinosaurs are taxa with Palaeolaurasian (or, in some case, even Neopangean) affinities. Other forms, such as paleobatrachid and batrachosauroidid lissamphibians, solemydid turtles, alligatoroid crocodyliforms, and nodosaurid dinosaurs can be considered as Euramerican taxa. Kallokibotionid and dortokid turtles, rhabdodontid dinosaurs and kogaionid mammals are endemic to Europe. The Gondwanan taxa have been regarded as African immigrants that reached southern Europe via the Mediterranean Tethyan sill. Abelisaurid and titanosaurid dinosaurs, trematochampsid crocodyliforms, podocnemidid and bothremydid turtles, and boid and madtsoiid snakes constitute the basic pattern of the so-called “Eurogondwanan fauna”. However, the validity of some of these taxa is a disputed matter (Titanosauridae, Trematochampsidae), and the presence of other taxa in the Late Cretaceous of Europe is based on controversial data (Boidae, Podocnemididae). Only Abelisauroidea, Madtsoiidae and Bothremydidae (and, yet for confirming, Sebecosuchia) provide evidence of interchanges between Africa and Europe. At least abelisauroids might have reached Europe before the Late Cretaceous. In conclusion, most of the continental tetrapod taxa from the latest Cretaceous of Europe show affinities with those of northern Hemisphere landmasses. Latest Cretaceous trans-Tethyan dispersal events between Africa and Europe remain poorly documented.

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Prasad, Guntupalli V. R., Vishal Verma, Pooja Grover, Rajkumari Priyadarshini, Ashok Sahni, and Ranjit S. Lourembam. "Isolated Archosaur teeth from the green sandstone capping the Coralline Limestone (Bagh Group) of the Narmada valley: Evidence for the presence of pre-Late to Late Maastrichtian abelisaurids in India." Island Arc 25, no. 6 (June 3, 2016): 410–20. http://dx.doi.org/10.1111/iar.12142.

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Prasad, Guntupalli V. R., and Ashok Sahni. "Late Cretaceous continental vertebrate fossil record from India: Palaeobiogeographical insights." Bulletin de la Société Géologique de France 180, no. 4 (July 1, 2009): 369–81. http://dx.doi.org/10.2113/gssgfbull.180.4.369.

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Abstract Geophysical data suggested a minimum of 35 Ma physical isolation for the Indian plate from the time of its separation from Madagascar around 88 Ma ago to its final collision with Asia in the Early-Middle Eocene (55-50 Ma ago). Such an extended period of segregation of any landmass is expected to result in genetic isolation of pre-existing populations leading to the development of endemic biota. Therefore, continental Late Cretaceous biota of India hold the key to our understanding of effects of long isolation and northward drift of the Indian plate over different latitudinal belts. Focused palaeontological research in the last one and half decades on the Deccan volcano-sedimentary sequences (infra– and intertrappean beds) has resulted in the recovery of diverse assemblages of vertebrate, invertebrate, and plant fossils. The Deccan volcano-sedimentary sequences were dated Late Cretaceous-Early Palaeocene in age based on vertebrate, ostracod, planktonic foraminiferal, palynofloral and geochronological data. Critical evaluation of the biota from these strata brings out a complex biogeographical picture. The Late Cretaceous biota of India include some taxa of Gondwanan affinities (leptodactylid, hylid and ranoid frogs, madtsoiid and nigerophiid snakes, pelomedusoid turtles, mesosuchian crocodiles, abelisaurid dinosaurs, and gondwanathere mammals), Gondwanan relicts (haramiyidan mammals), certain taxa of Laurasian affinities (pelobatid and Gobiatinae frogs, anguimorph lizards, eutherian mammals, charophytes), and ostracods of predominantly endemic nature. Since India was once part of the former Gondwanaland, the presence of Gondwanan taxa in the Late Cretaceous of India is not anomalous from a biogeographic point of view. These taxa might have been derived from Gondwanan stocks that boarded the Indian plate prior to its break-up from Africa or might represent immigrants from South America that reached the Indo-Madagascar block via Antarctica and the Kerguelen Plateau/Gunnerus ridge not later than 80 Ma. However, the presence of Laurasian non-marine taxa in the northward drifting Indian plate defies palaeogeographical data showing a wide body of marine water (Tethys) separating India from Asia. In the light of latest palaeontological, stratigraphic, geochemical and geophysical data from the northern margin of India, one cannot rule out dispersals from the northern landmasses across the Kohistan and Dras island-arcs and Trans-Himalayan magmatic arc. Other biogeographical models, such as “Out-of-India Dispersals” for many vertebrate, invertebrate, and plant groups, also deserve a close examination. At present, limited quantitative fossil data is available to test these biogeographical models.

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ZAHER, Hussam, Diego POL, Bruno A. NAVARRO, Rafael DELCOURT, and Alberto B. CARVALHO. "An Early Cretaceous theropod dinosaur from Brazil sheds light on the cranial evolution of the Abelisauridae." Comptes Rendus Palevol, no. 6 (October 12, 2020). http://dx.doi.org/10.5852/cr-palevol2020v19a6.

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Abelisaurid theropods dominated the predator role across Gondwana during the Late Cretaceous. They are characterized by highly reduced forelimbs and one of the most specialized cranial morphologies among carnivorous dinosaurs, exemplified by a broad skull, short rostrum, high occipital region, and highly kinetic intramandibular joint, suggestive of a specialized feeding strategy. Late Cretaceous abelisaurids are known from some remarkably complete taxa with well-preserved skulls. However, little is known about the pattern of character transformation that led to their highly modified condition because there are no well-preserved abelisaurids before the Late Cretaceous. Here we report a basal abelisaurid from the Early Cretaceous of Brazil that preserves a complete skull and reveals an early stage in the cranial evolution of the group. It lacks the specialized temporal and mandibular features characteristic of derived abelisaurids, including the kinetic intramandibular joint and knob-like dorsal projection of the parietals.

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Méndez, Ariel. "The cervical vertebrae of the Late Cretaceous abelisaurid dinosaur Carnotaurus sastrei." Acta Palaeontologica Polonica, 2012. http://dx.doi.org/10.4202/app.2011.0129.

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Méndez, Ariel. "The cervical vertebrae of the Late Cretaceous abelisaurid dinosaur Carnotaurus sastrei." Acta Palaeontologica Polonica, 2014. http://dx.doi.org/10.4202/app.2012.0095.

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Paulina-Carabajal, Ariana, and Cecilia Succar. "The endocranial morphology and inner ear of the abelisaurid theropod Aucasaurus garridoi." Acta Palaeontologica Polonica, January 10, 2013. http://dx.doi.org/10.4202/app.2013.0037.

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Cerroni, Mauricio A., Juan I. Canale, Fernando E. Novas, and Ariana Paulina‐Carabajal. "An exceptional neurovascular system in abelisaurid theropod skull: New evidence from Skorpiovenator bustingorryi." Journal of Anatomy, June 22, 2020. http://dx.doi.org/10.1111/joa.13258.

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