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Protoceratopsidae
Recognizing sexual dimorphism in the fossil record: lessons from nonavian dinosaurs
Ceratopsia increase: history and trends
Comparative anatomy of selected basal ceratopsian dentitions
A new species of Chasmosaurus (Dinosauria: Ceratopsia) from the Dinosaur Park Formation of southern Alberta
Mesozoic–Cenozoic tectonic–palaeogeographical evolution of Bayingobi Basin: response to subduction and collision of the Mongol–Okhotsk Ocean plate
The Taphonomy of a Centrosaurus (Ornithischia: Certopsidae) Bone Bed from the Dinosaur Park Formation (Upper Campanian), Alberta, Canada, with Comments on Cranial Ontogeny
Celebrating dinosaurs: their behaviour, evolution, growth, and physiology
New small-bodied ornithopods (Dinosauria, Neornithischia) from the Early Cretaceous Wonthaggi Formation (Strzelecki Group) of the Australian-Antarctic rift system, with revision of Qantassaurus intrepidus Rich and Vickers-Rich, 1999
The Cretaceous-Tertiary biotic transition
Forgotten women in an extinct saurian (man’s) world
Abstract Despite dinosaurs becoming significant ‘icons’ in our culture, few women have made major contributions to the study of fossil vertebrates, especially reptilian taxonomy, by specializing in the dinosaurs and related ‘saurians’. Most who were involved over the first 150 years were not professional palaeontologists but instead wives, daughters and pure (and usually unpaid) amateurs. Here we salute some 40 of them, showing how some kept alive childhood dreams and others fell into the subject involuntarily. As usual nineteenth-century female practitioners are virtually unknown in this area except for one icon, Dorset girl Mary Anning of Lyme Regis, who significantly contributed to the palaeontology. Only in the early twentieth century did women such as Tilly Edinger conduct research with an evolutionary agenda. Before the modern post-1960s era, beginning with Mignon Talbot, few were scientists or conducting research; others such as Mary Ann Woodhouse, Arabella Buckley, the Woodward sisters, Nelda Wright were artists, photographers and/or writers, scientifically illustrating and/or popularizing dinosaurs. Like many other women, they often battled to get from first base to job, appear fleetingly in the literature then disappear; or exist as anonymous presences behind eminent men. In contrast, the modern era offers better prospects for those wanting to pursue dinosaurs and their relatives, even if it means volunteering for a dino dig, watching a live ‘Time team’-type dinosaur dig on TV or entering the Big Virtual Saurian World now on the Internet. This paper considers the problems and highlights the achievements of the oft-forgotten women. Supplementary material: Additional references and list of books and publications by or about deceased women related to ‘saurians’, including these mentioned in the text, are available at http://www.geolsoc.org.uk/SUP18419 .
A new species of Pachyrhinosaurus (Dinosauria, Ceratopsidae) from the Upper Cretaceous of Alberta, Canada
Abstract A densely packed bone bed near Grande Prairie, Alberta, has produced abundant remains of a new species of ceratopsid. A minimum number of 27 individuals is represented in the part of the bone bed that has been excavated so far. The new animal— Pachyrhinosaurus lakustai sp. nov.— is closely related to the centrosaurine Pachyrhinosaurus canadensis, which has been recovered from younger beds in southern Alberta. It differs from the geologically younger species in having a relatively shorter nasal boss that is well separated from the supraorbital bosses. Juveniles of the new taxon resemble juveniles of Centrosaurus and other centrosaurines. However, the cranial morphology underwent a remarkable ontogenetic change, in which the nasal and supraorbital horns of the juveniles transformed into a huge nasal boss and smaller supraorbital bosses, and the frill became adorned with spikes and horns on top of and at the back of the parietal. Although there is some indication that the species may have been sexually dimorphic at maturity, it is not possible to separate sexual variation from individual and ontogenetic variation without a much larger sample. It is quite clear that the nasal boss supported some sort of keratinous structure, although it is not possible to determine its shape and function. No cause has been determined for the apparent catastrophic demise of a herd of P. lakustai. Key words : Dinosauria, Ceratopsia, Pachyrhinosaurus lakustai , Late Cretaceous, Alberta, Canada.