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Santana Fossils: An Illustrated Atlas
FRESHWATER STINGRAYS OF THE GREEN RIVER FORMATION OF WYOMING (EARLY EOCENE), WITH THE DESCRIPTION OF A NEW GENUS AND SPECIES AND AN ANALYSIS OF ITS PHYLOGENETIC RELATIONSHIPS (CHONDRICHTHYES:
Abstract Freshwater stingrays from the Fossil Butte Member of the late early Eocene Green River Formation of Wyoming are reviewed, and a new genus and species of fossil stingray is described.
What is an 'elasmobranch'? The impact of palaeontology in understanding elasmobranch phylogeny and evolution.
  • J. Maisey
  • Biology, Medicine
    Journal of fish biology
  • 1 April 2012
TLDR
A revised, apomorphy-based definition of elasmobranchs is presented in which they are considered the equivalent of neoselachians, i.e. a monophyletic group of modern sharks and rays which not only excludes all stem and crown holocephalans, but also many Palaeozoic shark-like chondrichthyans and even close extinct relatives of neOSElachian such as hybodonts.
Continental break up and the distribution of fishes of Western Gondwana during the Early Cretaceous
Abstract Many Early Cretaceous fishes were endemic to western Gondwana, making their fossils potentially useful tools in biogeographic reconstruction. These occur in a variety of tectonic settings;
The anatomy and interrelationships of Mesozoic hybodont sharks. American Museum novitates ; no. 2724
TLDR
It is concluded that Mesozoic hybodonts represent terminal members of a selachian group which has a lengthy Paleozoic history and is a far more precise statement than has hitherto been made regarding the early history of hyBodont sharks.
Cranial anatomy of the Lower Jurassic shark Hybodus reticulatus (Chondrichthyes, Elasmobranchii) : with comments on hybodontid systematics / John G. Maisey. American Museum novitates ; no. 2878
TLDR
The cranial anatomy is described from several incomplete specimens, including some of the type material, and Comparisons are made with the Lower Cretaceous Hybodus basanus, whose cranial morphology is more completely known.
Finspine morphogenesis in squalid and heterodontid sharks
Modern selachian finspines develop within a single, enlarged dermal papilla much earlier than any other papillary derived structure, and rapidly enlarge beyond the confines of the papilla. Within
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