Revision of the sauropod dinosaur Diamantinasaurus matildae Hocknull et al. 2009 from the mid-Cretaceous of Australia: Implications for Gondwanan titanosauriform dispersal

Poropat, Stephen F.; Upchurch, Paul; Mannion, Philip D.; Hocknull, Scott; Kear, Benjamin P.; Sloan, Trish; Sinapius, George H. K.; Elliott, David A.

doi:10.1016/j.gr.2014.03.014

Cited by 112 publications

(207 citation statements)

References 184 publications

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“…The Isisford fossil fauna is dominated by aquatic and semi-aquatic animals, specifically large-bodied, fast-swimming predatory teleost fishes (ichthyodectiforms including Cladocyclus geddesi, and a possible halecomorphan (Faggotter et al 2007;Berrell et al 2014)), as well as small-bodied (< 1.5 m) basal eusuchian crocodyliforms (Isisfordia duncani (Salisbury et al 2006a)). Although smallto medium-size non-avian dinosaurs have also been discovered (but are yet to be described) (Fletcher et al 2009), the remains of larger sauropodan dinosaurs commonly found at other fossil sites within the Winton Formation (see Coombs et al 1981;Molnar 2001;Molnar et al 2005;Salisbury et al 2006b;Hocknull et al 2009;Poropat et al 2015aPoropat et al , 2015b are notably absent, despite over a decade of intense collecting. Also conspicuous by their absence are the remains of dipnoan lungfishes and turtles, which are also found at other Winton Formation fossil sites (see Molnar 1991;Dettmann et al 1992;Kemp 1997).…”

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confidence: 99%

Depositional Environment of the Lower Cretaceous (Upper Albian) Winton Formation At Isisford, Central-West Queensland, Australia, Inferred From Sandstone Concretions

Syme¹,

Welsh²,

Roberts³

et al. 2016

Journal of Sedimentary Research

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Numerous vertebrate and plant fossils have been found in ex-situ sandstone concretions near Isisford in central-west Queensland since the mid-1990s. These concretions are found in the Lower Cretaceous portion (upper Albian, 100.5-102.2 Ma) of the Winton Formation. The lower most Winton Formation is thought to have formed in a fluvial channel or flood-basin setting proximal to the Eromanga Sea, but due to the scarcity of good exposures, the local depositional environment at Isisford has not been ascertained. Minimal compression of vertebrate and plant fossils, a lack of grain suturing, predominantly cement-supported fabric, and fractures running through calcite cement, as well as fossil bone and framework grains, indicates that concretions formed during early diagenesis (pre-compactional or syndepositional). Calcite stable-isotope δ 18 O VPDB values range from -12.25 to -4‰, indicating mixed marine and meteoric pore waters, and δ 13 C VPDB values range from -5.3 to 4.1‰, indicative of both sulfate reduction and methanogenesis of organic material (including decaying vertebrate soft tissues) in the burial environment. The mixed marine and freshwater signature suggests a marginal marine setting, possibly deltaic or estuarine, connected to the regressive epicontinental Eromanga Seaway at around 102-100 Ma. This is not inconsistent with the lithology from nearby cores, coupled with Isisford fossil-vertebrate ecology (personal observation). Our research demonstrates the utility of investigating ex-situ concretions to refine paleoenvironments at localities where little or no outcrop is available and traditional facies analysis is impractical. INTRODUCTIONSandstone concretions cemented with calcium carbonate have been reported worldwide, ranging from the centimeter scale (Dix and Mullins 1987;Allison and Pye 1994;Mozley and Davis 2005; Tabor et al. 2007), the decimeter to meter scale (Dix and

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confidence: 99%

Depositional Environment of the Lower Cretaceous (Upper Albian) Winton Formation At Isisford, Central-West Queensland, Australia, Inferred From Sandstone Concretions

Syme¹,

Welsh²,

Roberts³

et al. 2016

Journal of Sedimentary Research

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“…Its ascending process is reaching the posterior margin of the bone in proximal view. As such, it is different from basal sauropods, where the ascending process is restricted to the anterior portion (Wilson, 2002), and from diplodocines and derived titanosaurs, which have a reduced medial end, resulting in a rather trapezoidal outline in posterior view (Poropat et al, 2015b;Tschopp et al, 2015). Diplodocoids in general have posterolaterally facing fibular facets (Tschopp et al, 2015), instead of being strictly laterally oriented as in Camarasaurus.…”

Section: Pesmentioning

confidence: 95%

“…SMA 0002 is therefore the first Camarasaurus skeleton with a vestigial phalanx that is clearly articulated with phm II-1. The reduction of the phalanges culminates in derived titanosaurs, where all phalanges are vestigial or entirely absent (Borsuk-Bialynicka, 1977;Martínez et al, 2004;Hocknull et al, 2009;Poropat et al, 2015b). The shape of the phalanges yields insight into the sequence of their reduction.…”

Section: Manusmentioning

confidence: 99%

“…In diplodocids, camarasaurids, and early titanosauriforms, the distal articular surface of the proximal manual phalanges changes from being distinctly transversely concave in phm I-1 and II-1, to flat in phm III-1 and IV-1, to convex in phm V-1 (Gilmore, 1936;Janensch, 1961;Upchurch et al, 2004b;this study). The occurrence of vestigial elements that are directly articulated or even fused with the metacarpals in the derived titanosaurs Opisthocoelicaudia and Epachthosaurus (Borsuk-Bialynicka, 1977;Martínez et al, 2004;Poropat et al, 2015b) implies that the loss of distal condyles was followed by a significant reduction in both proximodistal length and transverse width (Carrano, 2005). Such a development must first have happened in the distal rows, and potentially initiated with the change of the function of the manus from grasping to weightbearing, which was probably the selection pressure favoring the loss of interphalangeal joints and manual unguals (Carrano, 2005).…”

Section: Manusmentioning

confidence: 99%

“…Additionally, Gilmore's (1936) monograph on Apatosaurus and BorsukBialynicka's (1977) paper on Opisthocoelicaudia include adequate descriptions of manus and pes elements. Recently, several publications yielded additional important information on manual and pedal shape in sauropods (McIntosh et al, 1992(McIntosh et al, , 1996aAverianov et al, 2002;Bonnan, 2003Bonnan, , 2005Martínez et al, 2004;Apesteguía, 2005;Bedell and Trexler, 2005;Bonaparte et al, 2006;Harris, 2007;Läng and Goussard, 2007;González Riga et al, 2008;Curry Rogers, 2009;Hocknull et al, 2009;D'Emic et al, 2011;Nair and Salisbury, 2012;Poropat et al, 2015aPoropat et al, , 2015b.…”

Section: Introductionmentioning

confidence: 99%

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Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria)

Tschopp

Wings

Frauenfelder

et al. 2015

Palaeontologia Electronica

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Tschopp, Emanuel, Wings, Oliver, Frauenfelder, Thomas, and Brinkmann, Winand. 2015. Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria ABSTRACTSkeletons of sauropods are rarely found with fore and hind feet, and until now, only one specimen of this clade has been reported with all four autopodia preserved complete and articulated. This makes interpretations on their locomotion difficult and proper assignments of footprints to genus-or even species-level taxa are generally impossible. Camarasaurus SMA 0002 from the Upper Jurassic Morrison Formation at Howe Ranch in the vicinity of Shell (Wyoming, USA) is the first sauropod with completely preserved and articulated osteological remains of all feet in addition to autopodial skin impressions. We describe in detail the morphology of the SMA 0002 autopodial bones and integumentary impressions, and draw comparisons with the published data on Camarasaurus and other sauropod manus and pedes. Our reconstruction orients the lateral side of the manus claw such that it faces the ground and possibly even contacts it distally. A 3D reconstruction of the autopodia of SMA 0002 yields new insights into the still debated relationship of footprint lengths to hip height in sauropods, and indicates that it might be variable among genera. Furthermore, manual and pedal morphology and the 3D model yield crucial information about the expected footprint shape of Camarasaurus. The recovered characteristics of the footprint do not possess a set of features to be confidently referred to a known ichnospecies.

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Three‐Dimensional Musculoskeletal Modeling of the Sauropodomorph Hind Limb: The Effect of Postural Change on Muscle Leverage

Klinkhamer

Mallison

Poropat

et al. 2018

The Anatomical Record

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The biomechanical constraints for life at massive size can be directly observed in the evolutionary history of sauropodomorph dinosaurs. Members of this lineage underwent a number of major postural transitions as they increased in size from relatively small bipedal dinosaurs to massive titanosaurs that include the largest terrestrial animals of all time. To better understand the impact of gigantic size on the biomechanics of sauropods, we used three‐dimensional musculoskeletal modeling to investigate how hind limb musculature was affected, first by the development of a quadrupedal stance from a bipedal one, and later in the transition from a narrow‐gauge to a wide‐gauge stance. Muscle moment arms were measured in four sauropodomorph taxa: the bipedal basal sauropodomorph Plateosaurus engelhardti, the narrow‐gauge diplodocid Diplodocus carnegii, the titanosauriform Giraffatitan brancai, and the wide‐gauge titanosaur Diamantinasaurus matildae. In Plateosaurus, low moment arm leverage in the hip extensors and knee flexors and extensors was observed suggesting high‐velocity movement for fast locomotion. A reduction in hip extensor leverage in Diamantinasaurus was found which suggests a reduced role for the hind limb in forward propulsion in titanosaurs. An increase in overall hip adductor leverage and leverage of adductors 1 and 2 in Diamantinasaurus, compared with other taxa studied, might relate to the development of a wide‐gauge stance. High knee flexor–extensor leverage in Giraffatitan but not Diamantinasaurus partially refutes the idea that broader femoral condyles in titanosauriforms increased knee torque production capabilities. Sauropodomorph postural changes clearly had an impact on the function and leverage of hind limb muscles. Anat Rec, 301:2145–2163, 2018. © 2018 Wiley Periodicals, Inc.

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Revision of the sauropod dinosaur Diamantinasaurus matildae Hocknull et al. 2009 from the mid-Cretaceous of Australia: Implications for Gondwanan titanosauriform dispersal

Cited by 112 publications

References 184 publications

Depositional Environment of the Lower Cretaceous (Upper Albian) Winton Formation At Isisford, Central-West Queensland, Australia, Inferred From Sandstone Concretions

Depositional Environment of the Lower Cretaceous (Upper Albian) Winton Formation At Isisford, Central-West Queensland, Australia, Inferred From Sandstone Concretions

Articulated bone sets of manus and pedes of Camarasaurus (Sauropoda, Dinosauria)

Three‐Dimensional Musculoskeletal Modeling of the Sauropodomorph Hind Limb: The Effect of Postural Change on Muscle Leverage

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