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7 results for “Dreadnoughtus”
Fig. 7 in Osteology of the dorsal vertebrae of the giant titanosaurian sauropod dinosaur Dreadnoughtus schrani from the Late Cretaceous of Argentina
Fig. 7. Partial neural arch of titanosaurian sauropod Dreadnoughtus schrani Lacovara, Lamanna, Ibiricu, Poole, Schroeter, Ullmann, Voegele, Boles, Carter, Fowler, Egerton, Moyer, Coughenour, Schein, Harris, Martínez, and Novas, 2014 (MPM-PV 1156?-7), from Santa Cruz Province, Argentina; middle–late Campanian to early Maastrichtian; in left lateral (A) and posterior (B) views.
Fig. 3 in Osteology of the dorsal vertebrae of the giant titanosaurian sauropod dinosaur Dreadnoughtus schrani from the Late Cretaceous of Argentina
Fig. 3. Nearly complete dorsal vertebrae of titanosaurian sauropod Dreadnoughtus schrani Lacovara, Lamanna, Ibiricu, Poole, Schroeter, Ullmann, Voegele, Boles, Carter, Fowler, Egerton, Moyer, Coughenour, Schein, Harris, Martínez, and Novas, 2014, from Santa Cruz Province, Argentina; middle–late Campanian to early Maastrichtian; in posterior view. A. MPM-PV 1156?-4, estimated as the ~4th dorsal vertebra. B. MPM-PV 1156?-5, ~5th. C. MPM-PV 1156-6, ~6th. D. MPM-PV 1156?-8, ~7th. E. MPM-PV 1156?-9, ~8th. F. MPM-PV 1156?-10, ~9th. G. MPM-PV 1156-11, ~10th. Dashed lines indicate fractured neural arch laminae. Colours indicate neural arch fossae.
Fig. 2 in Osteology of the dorsal vertebrae of the giant titanosaurian sauropod dinosaur Dreadnoughtus schrani from the Late Cretaceous of Argentina
Fig. 2. Nearly complete dorsal vertebrae of titanosaurian sauropod Dreadnoughtus schrani Lacovara, Lamanna, Ibiricu, Poole, Schroeter, Ullmann, Voegele, Boles, Carter, Fowler, Egerton, Moyer, Coughenour, Schein, Harris, Martínez, and Novas, 2014, from Santa Cruz Province, Argentina; middle–late Campanian to early Maastrichtian; in anterior view. A. MPM-PV 1156?-4, estimated as the ~4th dorsal vertebra. B. MPM-PV 1156?-5, ~5th. C. MPM-PV 1156-6, ~6th. D. MPM-PV 1156?-8, ~7th. E. MPM-PV 1156?-9, ~8th. F. MPM-PV 1156?-10, ~9th. G. MPM-PV 1156-11, ~10th. Colours indicate neural arch fossae.
Fig. 1 in Osteology of the dorsal vertebrae of the giant titanosaurian sauropod dinosaur Dreadnoughtus schrani from the Late Cretaceous of Argentina
Fig. 1. Nearly complete dorsal vertebrae of titanosaurian sauropod Dreadnoughtus schrani Lacovara, Lamanna, Ibiricu, Poole, Schroeter, Ullmann, Voegele, Boles, Carter, Fowler, Egerton, Moyer, Coughenour, Schein, Harris, Martínez, and Novas, 2014, from Santa Cruz Province, Argentina; middle–late Campanian to early Maastrichtian; in left lateral view. A. MPM-PV 1156?-4, estimated as the ~4th dorsal vertebra. B. MPM-PV 1156?-5, ~5th. C. MPM-PV 1156-6, ~6th. D. MPM-PV 1156?-8, ~7th. E. MPM-PV 1156?-9, ~8th. F. MPM-PV 1156?-10, ~9th. G. MPM-PV 1156-11, ~10th. Dashed lines indicate fractured neural arch laminae. Colours indicate neural arch fossae.
Fig. 5 in Osteology of the dorsal vertebrae of the giant titanosaurian sauropod dinosaur Dreadnoughtus schrani from the Late Cretaceous of Argentina
Fig. 5. Comparison of lamina capture in dorsal vertebrae of titanosaurian sauropod Dreadnoughtus schrani Lacovara, Lamanna, Ibiricu, Poole, Schroeter, Ullmann, Voegele, Boles, Carter, Fowler, Egerton, Moyer, Coughenour, Schein, Harris, Martínez, and Novas, 2014, from Santa Cruz Province, Argentina; middle–late Campanian to early Maastrichtian (A–E, shown in non-standard views for best visualization) and "disconnection" (sensu Gallina 2011) in presacral vertebrae of Bonitasaura salgadoi Apesteguía, 2004 from Río Negro Province, Argentina; Santonian (F). A. Left side of MPM-PV 1156?-4, estimated as the ~4th dorsal vertebra. B. Left side of MPM-PV 1156?-5, ~5th. C. Right side of MPM-PV 1156-6 (mirrored), ~6th. D. Right side of MPM-PV 1156?-8 (mirrored), ~7th. E. Right side of MPM-PV 1156?-9 (mirrored), ~8th. Changes in the PODLs through the sequence are denoted by a dotted line. F. Presacral vertebrae reproduced from Gallina (2011) under a Creative Commons Attribution License (CC BY 4.0). F, F, estimated13th? cervical ver1 7 tebra; F, F, ~1st dorsal vertebra; F, F, ~2nd dorsal vertebra; F, F, ~3rd dorsal vertebra; F, F, 6th? dorsal vertebra; F, F, ~10th? dorsal vertebra. 2 8 3 9 4 10 5 11 6 12 Photographs (F1–F6) and explanatory drawings (F7–F12). Abbreviations: DI, diapophysis; PODL, postzygodiapophyseal lamina; "PODL", "new incipient horizontal lamina arises from the postzygapophysis pointing towards the diapophysis", as per Gallina (2011: fig. 6A); POZ, postzygapophysis.
Data from: Downsizing a giant: re-evaluating Dreadnoughtus body mass
Estimates of body mass often represent the founding assumption on which biomechanical and macroevolutionary hypotheses are based. Recently, a scaling equation was applied to a newly discovered titanosaurian sauropod dinosaur (Dreadnoughtus), yielding a 59 300 kg body mass estimate for this animal. Herein, we use a modelling approach to examine the plausibility of this mass estimate for Dreadnoughtus. We find that 59 300 kg for Dreadnoughtus is highly implausible and demonstrate that masses above 40 000 kg require high body densities and expansions of soft tissue volume outside the skeleton several times greater than found in living quadrupedal mammals. Similar results from a small sample of other archosaurs suggests that lower-end mass estimates derived from scaling equations are most plausible for Dreadnoughtus, based on existing volumetric and density data from extant animals. Although volumetric models appear to more tightly constrain dinosaur body mass, there remains a clear need to further support these models with more exhaustive data from living animals. The relative and absolute discrepancies in mass predictions between volumetric models and scaling equations also indicate a need to systematically compare predictions across a wide size and taxonomic range to better inform studies of dinosaur body size.
Data from: Downsizing a giant: re-evaluating Dreadnoughtus body mass
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