A basal iguanodontian (Ornithischia: Ornithopoda) from the Late Cretaceous of South America

Coria, Rodolfo A.; Salgado, Leonardo

doi:10.1080/02724634.1996.10011333

Cited by 106 publications

(134 citation statements)

References 9 publications

Supporting

Mentioning

124

Contrasting

Unclassified

Order By: Relevance

“…2E). This results from the transversely thick posterior end, that becomes abruptly narrow towards the anterior edge of the bone, a character shared with Anabisetia (Coria & Calvo, 2002), Gasparinisaura (Coria & Salgado, 1996), and Notophypsilophodon (Martínez, 1998) (Fig. 3).…”

Section: Descriptionmentioning

confidence: 96%

“…These condyles delimitate a wide and deep flexor fossa, a character present in most nonhadrosaurid orntthopods, whereas in hadrosaurs both condyles conform a tubular structure (Norman, Sues, Witmer, & Coria, 2004). The anterior face of the bone shows a shallow extensor fossa such as in most basal Ornithopoda, whereas in other taxa (e.g., Fulgurotherium (Huene, 1932), Thescelosaurus (Gilmore, 1913), Othnielosaurus (Galton, 1977), Hypsilophodon (Huxley, 1869), Gasparinisaura (Coria & Salgado, 1996), Nothohypsilophodon (Martinez, 1998), this groove is totally absent. The articular surface is crossed by numerous grooves and rugosities, suggesting the presence of a very large cartilage bursa (Fig.…”

Section: Descriptionmentioning

confidence: 96%

See 1 more Smart Citation

A new ornithopod (Dinosauria, Ornithischia) from the Upper Cretaceous of Antarctica and its palaeobiogeographical implications

Rozadilla

Agnolín

Novas

et al. 2016

Cretaceous Research

View full text Add to dashboard Cite

Section: Descriptionmentioning

confidence: 96%

Section: Descriptionmentioning

confidence: 96%

A new ornithopod (Dinosauria, Ornithischia) from the Upper Cretaceous of Antarctica and its palaeobiogeographical implications

Rozadilla

Agnolín

Novas

et al. 2016

Cretaceous Research

View full text Add to dashboard Cite

“…The distal ends of the middle caudal chevrons of Valdosaurus are anteroposteriorly expanded in lateral view ( fig. 4A): although comparative material is lacking for other dryosaurids, similar chevrons are known in Gasparinisaura (Coria and Salgado, 1996;MUCPv-212), Leaellynasaura (NMV P185992, NMV P186047) and Tenontosaurus (Forster, 1990). Fortuitously, IWCMS 2013.175 possesses the most complete tail of any dryosaurid specimen described to date and demonstrates that Valdosaurus is likely to have possessed no more than 46-50 caudal vertebrae (fig.…”

Section: Discussionmentioning

confidence: 99%

A new specimen of Valdosaurus canaliculatus (Ornithopoda: Dryosauridae) from the Lower Cretaceous of the Isle of Wight, England

Barrett¹

2016

MMV

View full text Add to dashboard Cite

The anatomy of Valdosaurus canaliculatus is incompletely known and until recently was based exclusively upon the holotype femora. Additional discoveries from the Wessex Formation (Barremian) of the Isle of Wight during the past decade have considerably expanded the amount of material available and offered insights into the morphology of the vertebral column and pelvis. However, all of these specimens consist primarily of hind limb material. Here, I describe a newly discovered individual of this taxon, the most complete yet found, which was found in articulation and includes a partial dorsal series, an almost complete tail, pelvic material, and both hind limbs. Although the specimen is partially crushed it offers new information on the anatomy of Valdosaurus, facilitating comparisons with other dryosaurid taxa.

show abstract

“…Psittacosaurus and Gasparinisaura are both equipped with a sophisticated masticatory apparatus in addition to a gizzard with gastroliths (Coria and Salgado 1996;You and Dodson 2004;Sereno et al 2010); the reason for the evolution of what appears to be a unique double system for food Fritz 11 reduction remains obscure; possibly it is an adaptation for handling exceptionally tough plant food.…”

Section: Discussionmentioning

confidence: 99%

Gizzard vs. teeth, it's a tie: food-processing efficiency in herbivorous birds and mammals and implications for dinosaur feeding strategies

et al. 2011

View full text Add to dashboard Cite

Particle size reduction is a primary means of improving efficiency in herbivores. The mode of food particle size reduction is one of the main differences between herbivorous birds (gizzard) and mammals (teeth). For a quantitative comparison of the efficiency of food comminution, we investigated mean fecal particle sizes (MPS) in 14 herbivorous bird species and compared these with a data set of 111 non-ruminant herbivorous mammal species. In general MPS increased with body mass, but there was no significant difference between birds and mammals, suggesting a comparable efficiency of food processing by gizzards and chewing teeth. The results lead to the intriguing question of why gizzard systems have evolved comparatively rarely among amniote herbivores. Advantages linked to one of the two food comminution systems must, however, be sought in different effects other than size reduction itself. In paleoecological scenarios, the evolution of ''dental batteries,'' for example in ornithopod dinosaurs, should be considered an advantage compared to absence of mastication, but not compared to gizzardbased herbivory. Abstract. -Particle size reduction is a primary means of improving efficiency in herbivores. The mode of food particle size reduction is one of the main differences between herbivorous birds (gizzard) and mammals (teeth). For a quantitative comparison of the efficiency of food comminution, we investigated mean fecal particle sizes (MPS) in 14 herbivorous bird species and compared these with a data set of 111 non-ruminant herbivorous mammal species. In general MPS increased with body mass, but there was no significant difference between birds and mammals, suggesting a comparable efficiency of food processing by gizzards and chewing teeth.The results lead to the intriguing question of why gizzard systems have evolved comparatively rarely among amniote herbivores. Advantages linked to one of the two food comminution systems must, however, be sought in different effects other than size reduction itself. In paleoecological scenarios, the evolution of "dental batteries," for example in ornithopod dinosaurs, should be considered an advantage compared to absence of mastication, but not compared to gizzard-based herbivory.

show abstract

A basal iguanodontian (Ornithischia: Ornithopoda) from the Late Cretaceous of South America

Cited by 106 publications

References 9 publications

A new ornithopod (Dinosauria, Ornithischia) from the Upper Cretaceous of Antarctica and its palaeobiogeographical implications

A new ornithopod (Dinosauria, Ornithischia) from the Upper Cretaceous of Antarctica and its palaeobiogeographical implications

A new specimen of Valdosaurus canaliculatus (Ornithopoda: Dryosauridae) from the Lower Cretaceous of the Isle of Wight, England

Gizzard vs. teeth, it's a tie: food-processing efficiency in herbivorous birds and mammals and implications for dinosaur feeding strategies

Contact Info

Product

Resources

About