Taxonomy of Late Jurassic diplodocid sauropods from Tendaguru (Tanzania)

Remes, Kristian

doi:10.1002/mmng.200800008

Cited by 32 publications

(28 citation statements)

References 39 publications

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“…No distinct foramina occur close to the border with the parietal, unlike in Kaatedocus (Tschopp & Mateus, 2013b). The dorsal-most portion of the supraoccipital of SMA 0011 tapers, not forming a distinct dorsal elevation as in Apatosaurus CM 11162 (Berman & McIntosh, 1978), or the indeterminate flagellicaudatan MB.R.2388 (Remes, 2009). …”

Section: Description Of Sma 0011mentioning

confidence: 97%

“…The groove is faint and relatively short, not reaching either the anterior or the medial margin. Such a groove was usually interpreted as typical for dicraeosaurids (Remes, 2009; Whitlock, 2011a), but is also present in other diplodocids (Tschopp, Mateus & Benson, 2015). However, a fading out of this feature is uncommon in dicraeosaurids, where the groove is distinct (Janensch, 1935; Remes, 2009).…”

Section: Description Of Sma 0011mentioning

confidence: 99%

“…Such a groove was usually interpreted as typical for dicraeosaurids (Remes, 2009; Whitlock, 2011a), but is also present in other diplodocids (Tschopp, Mateus & Benson, 2015). However, a fading out of this feature is uncommon in dicraeosaurids, where the groove is distinct (Janensch, 1935; Remes, 2009). Ventrally, the anterior portion of the premaxillae thickens slightly dorsoventrally in order to bear the replacement teeth, but not to the extent seen in the referred specimen USNM 2673 (Tschopp, Mateus & Benson, 2015).…”

Section: Description Of Sma 0011mentioning

confidence: 99%

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Osteology ofGaleamopus pabstisp. nov. (Sauropoda: Diplodocidae), with implications for neurocentral closure timing, and the cervico-dorsal transition in diplodocids

Tschopp

Mateus

2017

PeerJ

108

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Diplodocids are among the best known sauropod dinosaurs. Numerous specimens of currently 15 accepted species belonging to ten genera have been reported from the Late Jurassic to Early Cretaceous of North and South America, Europe, and Africa. The highest diversity is known from the Upper Jurassic Morrison Formation of the western United States: a recent review recognized 12 valid, named species, and possibly three additional, yet unnamed ones. One of these is herein described in detail and referred to the genus Galeamopus. The holotype specimen of Galeamopus pabsti sp. nov., SMA 0011, is represented by material from all body parts but the tail, and was found at the Howe-Scott Quarry in the northern Bighorn Basin in Wyoming, USA. Autapomorphic features of the new species include a horizontal canal on the maxilla that connects the posterior margin of the preantorbital and the ventral margin of the antorbital fenestrae, a vertical midline groove marking the sagittal nuchal crest, the presence of a large foramen connecting the postzygapophyseal centrodiapophyseal fossa and the spinopostzygapophyseal fossa of mid- and posterior cervical vertebrae, a very robust humerus, a laterally placed, rugose tubercle on the concave proximal portion of the anterior surface of the humerus, a relatively stout radius, the absence of a distinct ambiens process on the pubis, and a distinctly concave posteroventral margin of the ascending process of the astragalus. In addition to the holotype specimen SMA 0011, the skull USNM 2673 can also be referred to Galeamopus pabsti. Histology shows that the type specimen SMA 0011 is sexually mature, although neurocentral closure was not completed at the time of death. Because SMA 0011 has highly pneumatized cervical vertebrae, the development of the lamination appears a more important indicator for individual age than neurocentral fusion patterns. SMA 0011 is one of very few sauropod specimens that preserves the cervico-dorsal transition in both vertebrae and ribs. The association of ribs with their respective vertebrae shows that the transition between cervical and dorsal vertebrae is significantly different in Galeamopus pabsti than in Diplodocus carnegii or Apatosaurus louisae, being represented by a considerable shortening of the centra from the last cervical to the first dorsal vertebra. Diplodocids show a surprisingly high diversity in the Morrison Formation. This can possibly be explained by a combination of geographical and temporal segregation, and niche partitioning.

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Section: Description Of Sma 0011mentioning

confidence: 97%

Section: Description Of Sma 0011mentioning

confidence: 99%

Section: Description Of Sma 0011mentioning

confidence: 99%

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Osteology ofGaleamopus pabstisp. nov. (Sauropoda: Diplodocidae), with implications for neurocentral closure timing, and the cervico-dorsal transition in diplodocids

Tschopp

Mateus

2017

PeerJ

108

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“…In some sauropods, there is a cranial foramen situated between the posterior portion of the parietals and the anterior portion of the supraoccipital. Known as the postparietal foramen, this feature has been inferred as a synapomorphy of Dicraeosauridae (Salgado and Bonaparte, 1991;Harris, 2006a;Remes, 2009;Whitlock, 2011a), an autapomorphy for the plateosaurian sauropodomorphs Massospondylus and Plateosaurus (Knoll et al, 2012), the basal sauropod Spinophorosaurus (Knoll et al, 2012), and the diplodocids Tornieria (Upchurch et al, 2004a;Remes, 2009), Kaatedocus (Tschopp and Mateus, 2013), and Galeamopus (Tschopp et al, 2015). Yet outside of Kaatedocus, Galeamopus, Tornieria, and Suuwassea (Lovelace et al, 2007;Whitlock and Harris, 2010;Whitlock, 2011a;Woodruff and Fowler, 2012), no members of Diplodocidae or other Late Jurassic sauropods are known to possess this cranial feature; however, given the scarcity of sauropod cranial material, it is possible that this feature may be more widespread in Sauropoda (Harris, 2006a;Whitlock and Harris, 2010;Hedrick et al, 2014).…”

Section: Morphologic Datamentioning

confidence: 99%

A new multi-faceted framework for deciphering diplodocid ontogeny

Woodruff

Fowler²,

Horner

2017

Palaeontologia Electronica

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“…Group 1 comprised diplodocids (Tornieria and "Barosaurus"), with the humeri MB . It must be mentioned that "Barosaurus" long bones from Tendaguru most probably belong to more than one diplodocid taxon (Remes 2009), but their close phylogenetic relationship makes it justifiable to use them together for the DFA in a supplementary group. Additionally, the group 3 with Dicraeosauridae comprises different taxa.…”

Section: Methodsmentioning

confidence: 99%