Palaeohistology and external microanatomy of rauisuchian osteoderms (Archosauria: Pseudosuchia)
نویسندگان
چکیده
منابع مشابه
Osteology of the Late Triassic aetosaur Scutarx deltatylus (Archosauria: Pseudosuchia)
Aetosaurians are some of the most common fossils collected from the Upper Triassic Chinle Formation of Arizona, especially at the Petrified Forest National Park (PEFO). Aetosaurians collected from lower levels of the park include Desmatosuchus spurensis, Paratypothorax, Adamanasuchus eisenhardtae, Calyptosuchus wellesi, and Scutarx deltatylus. Four partial skeletons collected from the park betw...
متن کاملOSTEODERMS OF JUVENILES OF STAGONOLEPIS (ARCHOSAURIA: AETOSAURIA) FROM THE LOWER CHINLE GROUp, EAST-CENTRAL ARIZONA
We describe for the first time small «25 mm) dorsal paramedian, lateral, and appendicular /ventral scutes (osteoderms) of aetosaurs from the Blue Hills in Apache County, east-central Arizona. These diminutive scutes, collected by c.L. Camp in the 1920s, preserve diagnostic features of the common Adamanian aetosaur Stagonolepis. Stagonolepis wellesi was already known from the Blue Hills, so iden...
متن کاملForelimb muscle and joint actions in Archosauria: insights from Crocodylus johnstoni (Pseudosuchia) and Mussaurus patagonicus (Sauropodomorpha)
Many of the major locomotor transitions during the evolution of Archosauria, the lineage including crocodiles and birds as well as extinct Dinosauria, were shifts from quadrupedalism to bipedalism (and vice versa). Those occurred within a continuum between more sprawling and erect modes of locomotion and involved drastic changes of limb anatomy and function in several lineages, including saurop...
متن کاملRevised phylogenetic analysis of the Aetosauria (Archosauria: Pseudosuchia); assessing the effects of incongruent morphological character sets.
Aetosauria is an early-diverging clade of pseudosuchians (crocodile-line archosaurs) that had a global distribution and high species diversity as a key component of various Late Triassic terrestrial faunas. It is one of only two Late Triassic clades of large herbivorous archosaurs, and thus served a critical ecological role. Nonetheless, aetosaur phylogenetic relationships are still poorly unde...
متن کاملFirst 'Rauisuchian' archosaur (Pseudosuchia, Loricata) for the Middle Triassic Santacruzodon Assemblage Zone (Santa Maria Supersequence), Rio Grande do Sul State, Brazil
The 'Rauisuchia' are a group of Triassic pseudosuchian archosaurs that displayed a near worldwide distribution. In Brazil, their fossils are found only in the Santa Maria Formation (Paraná Basin) of the Rio Grande do Sul State, specifically in the Middle Triassic Dinodontosaurus assemblage zone (AZ) and the Late Triassic Hyperodapedon AZ (Rauisuchus tiradentes). Between these two cenozones is t...
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ژورنال
عنوان ژورنال: Palaeontology
سال: 2011
ISSN: 0031-0239
DOI: 10.1111/j.1475-4983.2011.01098.x