Geology of Oxford and the valley of the Thames by John Phillips.

Phillips, John

doi:10.5962/bhl.title.32635

Cited by 108 publications

(96 citation statements)

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“…Buckland 1824;Phillips 1871;von Huene 1926;Walker 1964), France (e.g. Eudes-Deslongchamps 1838; Allain 2001Allain , 2002Allain and Chure 2002) and China (Dong 1984;Dong and Tang 1985;Gao 1993;Zhao and Currie 1993).…”

Section: Evolutionary and Biogeographic Aspectsmentioning

confidence: 99%

Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia

Rauhut¹

2005

Palaeontology

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A new taxon of theropod dinosaur is described as Condorraptor currumili gen. et sp. nov., from the Middle Jurassic (Callovian) Cañadó n Asfalto Formation of Chubut Province, Argentinean Patagonia. The taxon is represented by a single fragmentary postcranial skeleton. Although incompletely known, Condorraptor is the second most complete theropod from the Middle Jurassic of Gondwana. The new taxon is characterized by the absence of a posterior incision between the fibular condyle and the medial side of the proximal articular end of the tibia, the pleurocoels in the anterior cervicals being situated posteroventral to the parapophyses, and the presence of a pronounced 'step' between the distal articular facet and shaft of Mt IV. Pneumatic features of the vertebral column show strong variation between the left and right side. Condorraptor gen. nov. can be referred to the Tetanurae and is a representative of a global radiation of basal tetanurans in the Early to Mid Jurassic.

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Section: Evolutionary and Biogeographic Aspectsmentioning

confidence: 99%

Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia

Rauhut¹

2005

Palaeontology

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“…Following Benson and Druckenmiller (2014), cryptoclidid synapomorphies include large orbits and external nares, a small vertical jugal, the lack of a prefrontal, a strongly emarginated cheek, and reduced tooth ornamentation. Ten cryptoclidid genera are currently recognized (Benson and Druckenmiller, 2014): Abyssosaurus (Berezin, 2011), Colymbosaurus (Seeley, 1874), Cryptoclidus (Phillips, 1871), Djupedalia (Knutsen et al, 2012c), Kimmerosaurus (Brown, 1981), Muraenosaurus (Seeley, 1874), Pantosaurus (Marsh, 1893), Spitrasaurus (Knutsen et al, 2012b), Tatenectes (Knight, 1900), and Tricleidus (Andrews, 1909). Other provisionally valid cryptoclidids also included in the Benson and Druckenmiller (2014) analysis include Picrocleidus beloclis (Andrews, 1910) and 'Plesiosaurus' manselii (Hulke, 1870).…”

Section: Introductionmentioning

confidence: 99%

Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

Roberts

Druckenmiller

Delsett

et al. 2017

Journal of Vertebrate Paleontology

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ABSTRACT-Colymbosaurus is a genus of long-necked plesiosaurian represented by two valid species: C. megadeirus from the Upper Kimmeridge Clay Formation (Kimmeridgian-Tithonian) of the United Kingdom and C. svalbardensis from the Slottsmøya Member of the Agardhfjellet Formation (Tithonian-Berriasian) of Svalbard, Norway. Due to the lack of complete and articulated skeletons and a near absence of cranial material, Colymbosaurus has been problematic to characterize morphologically. Here, we describe and conduct a phylogenetic analysis on an informative new specimen referable to C. svalbardensis from the Slottsmøya Member, preserving a large portion of the axial and appendicular skeleton. The new material contributes important new osteological data for the species and together with an extensive examination of congeners in British museums, clarifies the diagnostic characters of the genus. We provide two new diagnostic characters of the epipodials for the genus and reevaluate the utility of an anteroposteriorly oriented bisecting ridge on the distal end of the propodials. We also present two new diagnostic features for C. svalbardensis regarding the neural canal and femoral morphology. A phylogenetic analysis recovers a monophyletic and well-supported Colymbosaurus. The new specimen of C. svalbardensis confirms that this species is not synonymous with other described Slottsmøya Member plesiosauroids, demonstrating considerable diversity of the clade at high latitudes close to the Jurassic-Cretaceous boundary.

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“…The author also indicated possible "Haversian canals" (= secondary osteons), although without concentric rings in the secondary lamellar bone, they were subsequently reinterpreted as a single primary canal (Steel, 2003). Phillips (1871) recognized similarities between the histology of pterosaurs with other non-avian and avian reptiles, highlighting its vascular system and the presence of trabecular over the medullary cavity.…”

Section: Paleohistological Research History Of Pterosaurmentioning

confidence: 99%

Biomechanical and physiological influences on the osteohistological deposition of Anhangueria (Pterosauria, Pterodactyloidea)

Eleutério¹,

Bantim²,

Lima³

et al. 2015

Rev. bras. paleontol.

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-The study of bone microstructure preserved in fossils provides substantial information about physiology, growth gradients and strategies, and some ecological considerations. Paleohistology is a useful tool for understanding the biological mechanisms of extinct animals. Presented here is the microstructure characterization of two Anhangueria pterosaurs. Thin sections of the fi rst wing phalanx and metacarpal IV of MN 7060-V have been confectioned, as have sections of the radius, ulna and fi rst wing phalanx of MPSC R2090. The histological analysis of bones of MN 7060-V revealed fi brolamellar tissue, few osteocytes and vascular canals. Bones of MPSC R2090 showed a mixed plexiform-fi brolamellar tissue and histovariability, showing that bones from the same individual grew in different patterns. The vascularization was high in the phalanx, intermediate in the ulna and absent in the radius. The absence of canals in the radius may be related to biomechanical issues, due to torsion resistance during fl ight. The histology and the absence of fused bones suggests that the specimens are not adults. Two distinct moments of growth were established. MN 7060-V is a subadult, with presence of bone porosity and MPSC R2090 is a young animal as determined by the high number of canals and plexiform-fi brolamellar tissues, which indicates fast growth. In this work, we concluded that in the Anhangueria clade, the growth of bones is not compatible with the ontogenetic stage. Young animals may present large proportions, whereas there were older individuals of smaller sizes in the same clade.Key words: paleohistology, Pterosauria, Anhangueria, Romualdo Formation, Araripe Basin.RESUMO -O estudo da microestrutura óssea preservada em organismos fósseis traz informações substanciais sobre a fi siologia, gradientes e estratégias de crescimento e uma série de considerações ecológicas. Para o entendimento dos mecanismos biológicos de animais extintos utiliza-se a paleohistologia. Apresentamos a caracterização microestrutural de dois pterossauros do clado Anhangueria. Foram confeccionadas lâminas da primeira falange alar e IV metacarpal de MN 7060-V, além da ulna, rádio e primeira falange alar de MPSC R2090. A análise histológica de ambos os ossos de MN 7060-V exibiu tecido fi brolamelar, poucos osteócitos e canais. Já os ossos de MPSC R2090 apresentaram tecido fi brolamelar plexiforme e histovariabilidade, sugerindo diferentes taxas de crescimento para os ossos de um mesmo indivíduo. A vascularização na falange foi elevada, intermediária na ulna e ausente no rádio. Essa ausência de canais pode estar relacionada a pressões biomecânicas, devido a resistência às cargas de torção exercidas durante o voo. A histologia e a ausência de fusão dos ossos sugerem indivíduos não adultos. Dois momentos diferentes de crescimento foram então estabelecidos. MN 7060-V é um subadulto, com presença de porosidade óssea e MPSC R2090 um jovem, devido à alta vascularização e tecido fi brolamelar plexiforme, indicativo de crescimento rápido. Foi concluído...

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Geology of Oxford and the valley of the Thames by John Phillips.

Cited by 108 publications

References 0 publications

Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia

Osteology and relationships of a new theropod dinosaur from the Middle Jurassic of Patagonia

Osteology and relationships ofColymbosaurusSeeley, 1874, based on new material ofC. svalbardensisfrom the Slottsmøya Member, Agardhfjellet Formation of central Spitsbergen

Biomechanical and physiological influences on the osteohistological deposition of Anhangueria (Pterosauria, Pterodactyloidea)

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