Noasaurid theropod (Abelisauria) femur from the Upper Cretaceous Bauru Group in Triângulo Mineiro (Southeastern Brazil)

Martinelli, Agustín G.; Marinho, Thiago da Silva; Egli, Federico Brissón; Hechenleitner, E. Martín; Iori, Fabiano Vidoi; Veiga, Fábio Hiratsuka; Basílici, Giorgio; Soares, Marcus Vinícius Theodoro; Marconato, André; Ribeiro, Luiz Carlos Borges

doi:10.1016/j.cretres.2019.07.011

Cited by 15 publications

(7 citation statements)

References 41 publications

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“…However, in the case for the phalanx here described the ventral projection proximally surpasses the level of the dorsal lip, contrasting with known noasaurids in which the projections are sub-equal in proximal extension (e.g., Laevisuchus, Noasaurus;Novas & Bandyopadhyay, 2001, Sampson et al, 2001Agnolin & Chiarelli, 2010;Brissón Egli et al, 2016). Noasaurids have been recorded in different Late Cretaceous localities of Gondwana, including India (Novas & Bandyopadhyay, 2001;, Africa (Sampson et al, 2001) and South America (Bonaparte & Powell, 1980;Bonaparte, 1991;Brissón Egli et al, 2016;Langer et al, 2019;Martinelli et al, 2019). Present specimen constitutes the southernmost record for this theropod family, and forms part of a small-sized theropod fauna also integrated by megaraptorids and unenlagiids (see below).…”

Section: Referred Material Mpm 21547 Isolated Rightcontrasting

confidence: 59%

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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The first fossil remains of vertebrates, invertebrates, plants and palynomorphs of the Chorrillo Formation (Austral Basin), about 30km to the SW of the town of El Calafate (Province of Santa Cruz), are described. Fossils include the elasmarian (basal Iguanodontia) Isasicursor santacrucensis gen. et sp. nov., the large titanosaur Nullotitan glaciaris gen. et sp. nov., both large and small Megaraptoridae indet., and fragments of sauropod and theropod eggshells. The list of vertebrates is also composed by the Neognathae Kookne yeutensis gen. et sp. nov., two isolated caudal vertebrae of Mammalia indet., and isolated teeth of a large mosasaur. Remains of fishes, anurans, turtles, and snakes are represented by fragmentary material of low taxonomical value, with the exception of remains belonging to Calyptocephalellidae. On the other hand, a remarkable diversity of terrestrial and freshwater gastropods has been documented, as well as fossil woods and palinological assemblages. The Chorrillo Formation continues south, in the Las Chinas River valley, southern Chile, where it is called Dorotea Formation. Both units share in their lower two thirds abundant materials of titanosaurs, whose remains cease to appear in the upper third, registering only elasmarians (Chorrillo Formation) and hadrosaurs (Dorotea Formation). Above both units there are levels with remains of invertebrates and marine reptiles. It is striking that the dinosaurs of the lower two thirds of the Chorrillo and Dorotea formations are represented by large basal titanosaurs and Megaraptoridae coelurosaurs, being the Saltasaurinae and Aeolosaurinae sauropods and Abelisauridae theropods totally absent. In contrast, these taxa are dominant components in sedimentary units of central and northern Patagonia (e.g., Allen, Los Alamitos, La Colonia formations). Such differences could reflect, in part, a greater antiquity (i.e., late Campanian-early Maastrichtian) for the Chorrillo fossils, or, more probably, different environmental conditions. Thus, knowledge of the biota of the southern tip of Patagonia is expanded, particularly those temporarily close to the K-Pg boundary.

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Section: Referred Material Mpm 21547 Isolated Rightcontrasting

confidence: 59%

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Novas¹,

Agnolín²,

Rozadilla³

et al. 2019

MACN

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“…This similarity between the noasaurines and MMCh-PV 69 (one of the smallest abelisaurids) reinforces that a smaller body size is positively related to the slowly formed parallel-fibered bone within Abelisauroidea ( Cerda, 2015 ; Baiano & Cerda, 2017 ), a trend also observed in other small dinosaur taxa ( Padian, Horner & Ricqlès, 2004 ; Erickson et al, 2009 ; Woodward et al, 2011 ). Nevertheless, concerning Noasauridae the paleohistological pattern of Vespersaurus and Masiakasauru s shows similarity with that of the unnamed specimen CPPLIP 1490 from Late Cretaceous of Brazil ( Martinelli et al, 2019 ), but does not with that of the Chinese elaphrosaurine Limusaurus . It is important to note that in the study performed by Wang et al (2017) that the histological description of the fibulae of Limusaurus is only presented in the Supplemental Information and the fibrolamellar tissue is mentioned in only two of the five analyzed elements.…”

Section: Discussionmentioning

confidence: 80%

“…This could also be true for Vespersaurus, because the Caiuá Group is interpreted as a semiarid environment, like the Maeverano Formation (Rogers et al, 2007). An arid and hot climate is also interpreted for the Adamantina Formation (Goldberg & Garcia, 2000) where CPPLIP 1490 (Martinelli et al, 2019) was recovered. These shared environmental conditions experienced by the aforementioned noasaurids in the Cretaceous of Gondwana may reinforce the hypothesis of Lee & O'Connor (2013) that environmental constraints played a role in selecting slower growth rates in response to restrictive conditions of water and food supply, for example.…”

Section: Size Growth Rate and Paleoecology Implicationsmentioning

confidence: 92%

“…We sectioned five femora and six tibiae. These appendicular elements were chosen for the following reasons: (1) femora and tibiae were sampled in previous paleohistological studies of Abelisauroidea ( Lee & O’Connor, 2013 ; Martinelli et al, 2019 ), allowing comparisons; and (2) the hind limb elements recovered from V. paranaensis vary slightly in size and presumably reflect different histological classes. The femora circumferences vary from 72% to 78% of the maximum femoral circumference of Vespersaurus found so far, whereas the tibiae vary from 91% to 93% of the maximum tibial circumference.…”

Section: Methodsmentioning

confidence: 99%

“…ROM 64666 is a young juvenile, despite its larger size compared to the most noasaurids (204 mm length, equivalent to the largest specimens of Masiakasaurus ), characterized by a fast-growing fibrolamellar bone complex and lack of growth marks ( Evans et al, 2015 ). In the femur CPPLIP 1490 (preserved length of 132 mm), the compacta is primarily composed of slowly forming parallel-fibered bone tissue ( Martinelli et al, 2019 ).…”

Section: Introductionmentioning

confidence: 99%

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Osteohistology and growth dynamics of the Brazilian noasauridVespersaurus paranaensisLanger et al., 2019 (Theropoda: Abelisauroidea)

Souza

Soares

Brum

et al. 2020

PeerJ

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Although the knowledge of bone histology of non-avian theropods has advanced considerably in recent decades, data about the bone tissue patterns, growth dynamics and ontogeny of some taxa such as abelisauroids are still limited. Here we describe the bone microstructure and growth dynamics of the Brazilian noasaurine Vespersaurus paranaensis using five femora and six tibiae and quantify the annual growth marks through retrocalculation of missing ones to estimate ontogenetic ages. The femoral series comprises four femoral histological classes (FHC I-IV), varying from two annuli or LAGs to seven LAGs. Femora show that sexual maturity was achieved around the seventh to tenth year of life, whereas the tibiae suggest it was earlier (around three to five years old). Tibiae represent three histological classes (THC I-III) displaying from three to nine LAGs. Two tibiae (THC III) exhibit an external fundamental system indicating that these specimens reached full skeletal size. The heterogeneous maturity observed in Vespersaurus hind limb bones could result from diﬀerential allometry scaling between femora and tibiae length with the body length. The predominant parallel-fibered bone matrix suggests that Vespersaurus grew more slowly than most theropods, including other abelisauroids, in a pattern shared with the noasaurines Masiakasaurus knopfleri from Madagascar and CPPLIP 1490 from Brazil. This deviation from the typical theropod growth pattern may be mainly correlated with small body size, but also may related to resource limitation imposed by the arid climate prevailing in southwestern Gondwana during Cretaceous. Moreover, given the ecological and phylogenetic similarities among these taxa, such features would probably be apomorphic within Noasauridae.

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A microvertebrate assemblage from the Adamantina Formation (Bauru Group, Upper Cretaceous) in São Paulo State, Brazil

Freitas¹,

Batezelli

Muniz

et al. 2023

Cretaceous Research

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Noasaurid theropod (Abelisauria) femur from the Upper Cretaceous Bauru Group in Triângulo Mineiro (Southeastern Brazil)

Cited by 15 publications

References 41 publications

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Paleontological discoveries in the Chorrillo Formation (upper Campanian-lower Maastrichtian, Upper Cretaceous), Santa Cruz Province, Patagonia, Argentina

Osteohistology and growth dynamics of the Brazilian noasauridVespersaurus paranaensisLanger et al., 2019 (Theropoda: Abelisauroidea)

A microvertebrate assemblage from the Adamantina Formation (Bauru Group, Upper Cretaceous) in São Paulo State, Brazil

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