The Osteology of Balaur bondoc, an Island-Dwelling Dromaeosaurid (Dinosauria: Theropoda) from the Late Cretaceous of Romania

Brusatte, Stephen L.; Vremir, Mátyás; Csiki-Sava, Zoltán; Turner, Alan H.; Watanabe, Akinobu; Erickson, Gregory M.; Norell, Mark A.

doi:10.1206/798.1

Cited by 68 publications

(159 citation statements)

References 118 publications

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“…35, 36), which is the ancestral condition in most basal maniraptorans, and is in contrast to the elongate pedal phalanx I-1 of Archaeopteryx and more advanced avialans. An elongate pedal phalanx I-1 is also observed in the maniraptoran Epidexipteryx and Balaur (Zhang et al, 2008;Csiki et al, 2010;Brusatte et al, 2013). In BMNHC PH804, the right pedal phalanx IV-5 appears shorter than phalanx IV-4, but the left pedal phalanx IV-5 appears longer than phalanx IV-4 (table 1).…”

Section: Postcraniummentioning

confidence: 78%

New Specimens ofAnchiornis huxleyi(Theropoda: Paraves) from the Late Jurassic of Northeastern China

Pei

Meng

et al. 2017

Bulletin of the American Museum of Natural History

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103

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Section: Postcraniummentioning

confidence: 78%

New Specimens ofAnchiornis huxleyi(Theropoda: Paraves) from the Late Jurassic of Northeastern China

Pei

Meng

et al. 2017

Bulletin of the American Museum of Natural History

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103

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“…However, a rugose surface is known to occur in some other adult deinonychosaurians (Csiki et al, 2010;Brusatte et al, 2013). The surface texture of the hind limb is hard to determine due to erosion.…”

Section: Hind Limbmentioning

confidence: 99%

Osteology of a New Late Cretaceous Troodontid Specimen from Ukhaa Tolgod, Ömnögovi Aimag, Mongolia

Pei

Norell

Barta

et al. 2017

American Museum Novitates

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A new troodontid dinosaur, Almas ukhaa, from the Late Cretaceous deposits of the Djadokhta Formation at Ukhaa Tolgod, Mongolia, is described here. The holotype specimen (IGM 100/1323) comprises an almost complete and articulated cranium and partial articulated postcranial skeleton. This specimen has a small body size and a short snout as in basal paravians, but it exhibits a number of derived troodontid features that differentiate Almas ukhaa from the Early Cretaceous troodontids reported from China and unite this new taxon with other Late Cretaceous troodontids. Relative to other troodontids, Almas ukhaa is autapomorphic in the presence of a posteriorly curved pterygoid flange, absence of a lateral groove on the anterior part of the dentary, presence of a distinct spikelike process on the ischium, and elongate chevrons. The eggshell associated with IGM 100/1323 can be assigned to Prismatoolithidae indet. based on the smooth surface, eggshell thickness, and microstructural characteristics, and also preserves attributes similar to Protoceratopsidovum minimum. A unique relationship between Byronosaurus and the perinate troodontids IGM 100/972 and IGM 100/974 is no longer supported based on the new observations of Almas ukhaa and Gobivenator.

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“…The only dromaeosaurid we know of with a comparatively short MT V is Balaur (EME PV 313, Brusatte et al, 2013: Figs. 36, 37) which is around a third of the length of MT IV (but the distal tip of the right MT V is broken [EME PV 313, Brusatte et al, 2013: Fig. 37C]), although a recent study argued that it is actually an avialan (Cau et al, 2015).…”

Section: Description and Comparisonsmentioning

confidence: 99%

The first dromaeosaurid (Dinosauria: Theropoda) from the Early Cretaceous Bayan Gobi Formation of Nei Mongol, China

Pittman

Pei

2015

Preprint

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The first dromaeosaurid theropod from the Early Cretaceous Bayan Gobi Formation is identified based on an incompletely preserved partially-articulated left leg, increasing the known diversity of its understudied ecosystem. The leg belongs to specimen IVPP V22530 and includes a typical deinonychosaurian pedal phalanx II-2 with a distinct constriction between the enlarged proximal end and the distal condyle as well as a typical deinonychosaurian enlarged pedal phalanx II-3. It possesses a symmetric metatarsus and a slender and long MT V that together suggest it is a dromaeosaurid. Two anatomical traits suggest the leg is microraptorine-like, but a more precise taxonomic referral was not possible: metatarsals II, III and IV are closely appressed distally and the ventral margin of the medial ligament pit of phalanx II-2 is close to the centre of the rounded distal condyle. This taxonomic status invites future efforts to discover additional specimens at the study locality because -whether it is a microraptorine or a close relative -this animal is expected to make important contributions to our understanding of dromaeosaurid evolution and biology.

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The Osteology of Balaur bondoc, an Island-Dwelling Dromaeosaurid (Dinosauria: Theropoda) from the Late Cretaceous of Romania

Cited by 68 publications

References 118 publications

New Specimens ofAnchiornis huxleyi(Theropoda: Paraves) from the Late Jurassic of Northeastern China

New Specimens ofAnchiornis huxleyi(Theropoda: Paraves) from the Late Jurassic of Northeastern China

Osteology of a New Late Cretaceous Troodontid Specimen from Ukhaa Tolgod, Ömnögovi Aimag, Mongolia

The first dromaeosaurid (Dinosauria: Theropoda) from the Early Cretaceous Bayan Gobi Formation of Nei Mongol, China

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