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2015
Journal article
Ichthyosaurs from the Jurassic of Skye, Scotland
Fossils of Mesozoic vertebrates are rare in Scotland, particularly specimens of marine reptiles such as plesiosaurs and ichthyosaurs. We describe a suite of ichthyosaur fossils from the Early to Middle Jurassic of Skye, which to our knowledge are the first ichthyosaurs from Scotland to be described and figured in detail....Brusatte, Stephen L ; Young, Mark T ; Challands, Thomas James ; Clark, Neil D L ; Fischer, Valentin …
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2012
Journal article
Evolution of the brain and sensory organs in Sphenisciformes: new data from the stem penguin Paraptenodytes antarcticus
Penguins have undergone dramatic changes associated with the evolution of underwater flight and subsequent loss of aerial flight, which are manifest and well documented in the musculoskeletal system and integument. Significant modification of neurosensory systems and endocranial spaces may also be expected along this locomotor transition. However, no investigations of...Ksepka, D T ; Balanoff, Amy M ; Walsh, Stig A ; Revan, A ; Ho, A
Spheniscidae, palaeoneurology, computed tomography, and neuroanatomy
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2009
Journal article
A new specimen of Baphetes from Nýřany, Czech Republic and the intrinsic relationships of the Baphetidae
'Loxomma'bohemicum from the Upper Carboniferous assemblage from Nýřany, Czech Republic, is a nomen dubium restricted to the type and only specimen. The new binomen Baphetes orientalis is created for a skull referred to Baphetes bohemicus by later authors. A previously undescribed baphetid specimen from Nýřany is referred to B. orientalis...Milner, Angela C ; Milner, Andrew R. ; Walsh, Stig A
Tetrapoda, Morphology, Carboniferous , and Phylogeny
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2016
Journal article
Best practices for digitally constructing endocranial casts: examples from birds and their dinosaurian relatives
The rapidly expanding interest in, and availability of, digital tomography data to visualize casts of the vertebrate endocranial cavity housing the brain (endocasts) presents new opportunities and challenges to the field of comparative neuroanatomy. The opportunities are many, ranging from the relatively rapid acquisition of data to the unprecedented ability...Balanoff, Amy M ; Bever, G S ; Colbert, Matthew W ; Clarke, Julia A ; Field, Daniel J …
brain, Aves, endocast, comparative neuroanatomy, and computed tomography
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2016
Journal article
A reappraisal of Cerebavis cenomanica (Aves, Ornithurae), from Melovatka, Russia
The evolution of the avian brain is of crucial importance to studies of the transition from non-avian dinosaurs to modern birds, but very few avian fossils provide information on brain morphological development during the Mesozoic. An isolated specimen from the Cenomanian of Melovatka in Russia was described by Kurochkin and...Walsh, Stig A ; Milner, Angela C ; Bourdon, Estelle
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2016
Journal article
A lower jaw of Palaeoxonodon from the Middle Jurassic of the Isle of Skye, Scotland, sheds new light on the diversity of British stem therians
The Middle Jurassic was a key interval of mammalian evolutionary history that witnessed the diversification of the therian stem group. Great Britain has yielded a significant record of mammalian fossils from this interval, represented by numerous isolated jaws and teeth from the Bathonian of Oxfordshire and the Isle of Skye....Close, Roger A ; Davis, Brian M ; Walsh, Stig A ; Wolniewicz, Andrzej ; Friedman, Matt …
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2016
Journal article
Phylogenetic and environmental context of a Tournaisian tetrapod fauna
The end-Devonian to mid-Mississippian time interval has long been known for its depauperate palaeontological record, especially for tetrapods. This interval encapsulates the time of increasing terrestriality among tetrapods, but only two Tournaisian localities previously produced tetrapod fossils. Here we describe five new Tournaisian tetrapods (Perittodus apsconditus, Koilops herma, Ossirarus kierani, Diploradus austiumensis and Aytonerpeton microps)...Clack, Jennifer A ; Bennett, Carys E ; Carpenter, David K ; Davies, Sarah J ; Fraser, Nicholas C …
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2016
Journal article
The braincase and neurosensory anatomy of an Early Jurassic marine crocodylomorph: Implications for crocodylian sinus evolution and sensory transitions
Modern crocodylians are a morphologically conservative group, but extinct relatives (crocodylomorphs) experimented with a wide range of diets, behaviors, and body sizes. Among the most unusual of these fossil groups is the thalattosuchians, an assemblage of marine-dwellers that transitioned from semiaquatic species (teleosaurids and kin) into purely open-ocean forms (metriorhynchids)...Brusatte, Stephen L ; Muir, Amy ; Young, M T ; Walsh, Stig A ; Steel, L …
tympanic sinuses, pneumaticity, crocodylomorph, thalattosuchian, sensory evolution, and neuroanatomy