Archive for category PalArch’s Journal of Vertebrate Palaeontology
Tor Bertin. 2010. A Catalogue of Material and Review of the Spinosauridae. – PalArch’s Journal of Vertebrate Palaeontology 7 (4): 1-39
Abstract Spinosaurids are a monophyletic clade of large-bodied, long-snouted theropod dinosaurs known from minimal skeletal material. In an effort to assist future research on this unusual clade, a catalogue of past spinosaurid discoveries is presented. Database information includes specimen numbers, material identification, locality information, depositional environments, stratigraphic detail, generic or subclade assignment, tooth measurements, tooth placement, and detailed notes on the nature of the finds themselves when needed. Previously reported biogeographic and faunal dispersal patterns suggest that spinosaurids may eventually be found in North American strata, potentially having migrated from western Europe in the Early Cretaceous and eastern Asia over the Beringian isthmus in the Late Cretaceous. This database may be useful for predicting future points of spinosaurid discovery.
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H.D. Sues about Ryan, M.J., B.J. Chinnery-Allgeier & D.A. Eberth. Eds. 2010. New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. – Bloomington, Indiana University Press
The Ceratopsia or horned dinosaurs are a very distinctive group of ornithischian dinosaurs. All have a narrow beak, and most have bony collars or frills extending from the back of the skull. The earliest forms were still rather small and bipedal. Later taxa attained large head and body size and became quadrupedal; they are often considered the dinosaurian analogue of a rhinoceros. Most of these derived forms also sport prominent nasal and/or supraorbital horns. One of the geologically youngest ceratopsians, Triceratops, ranks among the most widely known dinosaurs, rivaling its likely predator, Tyrannosaurus rex, in popular recognition.
Despite their appeal, ceratopsians have been the subject of only a few comprehensive studies. [...]
- Read the entire review (PDF file)
Lucia Herrero & Andrew A. Farke. 2010. Hadrosaurid Dinosaur Skin Impressions from the Upper Cretaceous Kaiparowits Formation of Southern Utah, USA. – Palarch’s Journal of Vertebrate Palaeontology 7(2) (2010), 1-7. ISSN 1567-2158. 7 pages + 1 figure.
Abstract Skin impressions from hadrosaurid dinosaurs are relatively common finds throughout the Cretaceous Western Interior of North America. A recently discovered specimen from the late Campanian-aged Kaiparowits Formation of southern Utah is typical for hadrosaurs, with randomly arranged polygonal tubercles averaging around 4 mm in length and 3 mm in width. Based on the associated bones, these impressions likely originated on the thorax of the animal. In contrast with most previously published finds, the skin is not preserved in perfect articulation with the skeleton. This suggests a taphonomic mode in which the skeleton and soft tissues were partially disarticulated prior to burial.
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Syverson, Valerie J. & Donald R. Prothero. 2010. Evolutionary Patterns in Late Quaternary California Condors. – PalArch’s Journal of Vertebrate Palaeontology 7, 1: 1-18
Abstract Pleistocene fossils related to the living California condor (Gymnogyps californianus) have been found in several locations in western North America. Different authors have either assigned these to the species G. amplus or considered them a chronological subspecies of G. californianus. We examined the morphology of the genus Gymnogyps from the late Pleistocene to the present, using hundreds of specimens from the asphalt deposits of Rancho La Brea (RLB) and 62 partial modern skeletons. The limb bones (using seven variables on each element) and skulls (using 13 variables) were quantitatively compared using bivariate and multivariate techniques. No significant size or shape change through time was apparent in RLB samples ranging from the late Pleistocene (35,000 radiocarbon years b.p.) to the early Holocene (9000 radiocarbon years b.p.), suggesting evolutionary stasis in the face of the climatic changes of the last glacial-interglacial cycle. Proximal limb elements and skulls showed patterns of variation consistent with a species distinction between the RLB specimens and modern G. californianus. This confirms Fisher’s (1944) contention that the RLB species is referable to G. amplus Miller 1911, and not referable to the modern species. A set of specimens from a 9000-year-old Indian midden in Oregon as well as the presence of Gymnogyps in early Holocene Pit 10 at RLB suggest that the modern and ancient Gymnogyps may have coexisted with each other as well as with humans, and not died out or become dwarfed with the extinction of the rest of the Pleistocene megafauna, as suggested by some authors.
Until the explosive results of the popularity of dinosaurs stimulated by fi lms like Jurassic Park, mammal palaeontology dominated vertebrate palaeontology meetings and publications. And yet, despite these former decades of dominance, the state of affairs, particularly the systematics and descriptive work on one of the most common large mammal groups in North America and Europe, the Artiodactyla, has been rife with gaps and conundrums. It is unfair to characterize the present state of most artiodactyl groups
to some inadequacy of workers from past decades, as they were simply doing their best with the materials and methods of the times. But considering the diversity of artiodactyls worldwide and their rich fossil record, most artiodactyl workers today would probably agree that the number of specialists had declined for much of the 1980s and 1990s. This last decade has been a renaissance for the fi eld, in part spurred by the debate over the position of the Cetacea within the Artiodactyla itself. …
Posted by Palarch Editor (IJJN) in Book Reviews, PalArch's Journal of Archaeology of Northwest Europe, PalArch's Journal of Vertebrate Palaeontology on October 10th, 2009
NEWS: Spectacular discovery of first‐ever Dutch Neanderthal Fossil skull fragment unveiled by Minister Plasterk in National Museum of Antiquities
Posted by PalArch Editor (AV) in News, PalArch's Journal of Archaeology of Northwest Europe, PalArch's Journal of Vertebrate Palaeontology on June 15th, 2009
For the first time ever, a fossil of a Neanderthal has been discovered in the Netherlands. The skull fragment, over 40,000 years old, with its characteristically thick Neanderthal eyebrow ridge, was found off the coast of Zeeland, dredged up from the bottom of the North Sea. Huge quantities of fossil bones have been brought to the surface from this seabed since 1874, however, this is the first time a Neanderthal fossil has been found. The unique discovery was officially unveiled on the 15th of June by Ronald Plasterk (Dutch Minister of Education, Culture and Science) at the Rijksmuseum van Oudheden (National Museum of Antiquities) in Leiden, where it is on display to the public starting from June 16th.
The discovery of the first Neanderthal fossil on Dutch territory is of tremendous importance to the cultural heritage of the Netherlands and a milestone for Dutch archaeology and palaeontology. The discovery also underlines the archaeological and geological richness of the North Sea. During the Ice Age, this area was mostly a dry lowland plain rather than a sea. Stone tools of Neanderthals and large quantities of fossil bones of mammoths and other Ice Age animals have been trawled up from the bottom of the North Sea regularly. Never before have researchers found fossils of the actual Neanderthals themselves, though.
The PalArch Foundation has today launched its new web site. For the time being, only new publications are accessible, but we are going to transport our archives to the new site this summer. Of course, all publications will remain freely accessible.
The new architecture we use offers some exciting new possibilities, in particular the possibility to receive automatic updates through dedicated RSS feeds and via e-mail.
Panadès I Blas, X. & R. Patnaik. 2009. A Complete Crocodylian Egg from the Upper Miocene (Chinji Beds) of Pakistan and its Palaeobiographical Implications. – PalArch’s Journal of Vertebrate Palaeontology 6, 1: 1-8
Abstract The first fossil crocodylian egg from the Upper Miocene the Chinji Formation of the Siwalik Group of Pakistan is reported here. It represents a new locality, and the first record of the order in the area. The specimen was uncovered in a fl uvial environment, and cannot be defined more accurately, because of the poor preservation of its structural levels, and lack of direct association to osseous remains.
keywords: crocodylians – eggshells – egg – Pakistan – Palaeooölogy – palaeooöspecies
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NEWS: Dick Mol & Wilrie van Logchem, A humerus of the saber-toothed cat, Homotherium crenatidens (Weithofer, 1889) dredged from the seabed between the British Islands and The Netherlands
- H.J.M. Meijer about Martill, D.M., G. Bechly & R.F. Loveridge. 2007. The Crato fossil beds. Window into an ancient world. – Cambridge, Cambridge University Press
- A.J. Veldmeijer about Mol, D., W. van Logchem, K. van Hooijdonk & R. Bakker. 2007. De sabeltandtijger uit de Noordzee. – Norg, Drukware
- I.J.J. Nieuwland about Wellnhofer, P. 2008. Archaeopteryx. Der Urvogel von Solnhofen – München, Friedrich Pfeil and Bollen, L. 2008. Der Flug des Archaeopteryx. Auf der Suche nach dem Ursprung der Vögel – Wiebelsheim, Quelle und Meyer
Heeteren, van, A.H. 2008. Homo floresiensis as an island form. – PalArch’s Journal of Vertebrate Palaeontology 5, 2: 1-12
Abstract Homo floresiensis is a small bodied hominin from the Indonesian island Flores. The type specimen, LB1, is believed to be a female of approximately 1 m or a bit more than 3 feet in length with a cranial capacity of around 400 cc. There is still no agreement on the cause of the small stature and small cranial capacity of LB1 and the associated individuals.
Homo floresiensis displays several island adaptations, which also have been observed among the members of other typical island faunas, indicating that Homo floresiensis might very well have been an endemic island form. Homo floresiensis has morphology similar to that of a Homo erectus juvenile, since it has a high orbital, dental and brachial index, low humeral torsion, low tibial torsion and a high gonial angle. Additionally Homo floresiensis has shortened lower limbs. The features displayed by Homo floresiensis give an indication of the manner of dwarfing by paedomorphosis, which was by truncating growth through increase in the rate of skeletal ossification, possibly caused by hormonal changes.
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