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Skip to Search Results- 2Miyashita, Tetsuto
- 1Adams, Emily
- 1Barr, Braden N.
- 1Bird, Heather M
- 1Byers, Kaylee A.
- 1Carey, Shane F
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Fall 2017
Three species of Cretaceous marine squamates are described or redescribed. The first, Pontosaurus ribaguster is described from a relatively complete specimen discovered on Hvar Island, Croatia. Preservation of identifiable nektonic teleosts within the gastric cavity (the first identifiable...
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Fall 2018
A full understanding of the evolution of novel forms requires inference about their origins through the study of variation in extant taxa and clues from the fossil record. However, the origins of morphological diversity in many groups are obscured by the scarcity of transitional fossils or...
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Spring 2015
Pachyrhinosaurus is a peculiar ceratopsian known only from Upper Cretaceous strata of Alberta and the North Slope of Alaska. The genus consists of three described species Pachyrhinosaurus canadensis, Pachyrhinosaurus lakustai, and Pachyrhinosaurus perotorum that are distinguishable by cranial...
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Fall 2019
Cilia are microtubule-based structures that project from nearly every cell in the vertebrate body. While cilia in different contexts can have either sensory or motile functions, all cilia rely upon a core set of genes. When these genes are mutated either singly or in various combinations, a...
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Fall 2010
I investigated the paired sternum V glands in thirty-eight trichopteran families and all lepidopteran families possessing the gland or associated structures. Using my morphological data and literature data on sternum V gland secretions, I examined phylogenetic trends in morphology and gland...
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Development, Anatomy, and Phylogenetic Relationships of Jawless Vertebrates and Tests of Hypotheses about Early Vertebrate Evolution
DownloadSpring 2018
The origin and early evolution of vertebrates remain one of the central questions of comparative biology. This clade, which features a breathtaking diversity of complex forms, has generated profound, unresolved questions, including: How are major lineages of vertebrates related to one another?...
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Genetic diversity and selection in North American red squirrels (Tamiasciurus hudsonicus): A Hamiltonian perspective into the processes and mechanisms of evolution
DownloadFall 2013
The theory of natural selection has advanced our understanding in every aspect of biological sciences, yet despite this seeming ubiquity, there remain some components that are not fully resolved. Natural selection predicts the “selfish” advancement of genes that are optimally suited for their...
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Two New Species and a Revised Phylogeny of the Ellimmichthyiformes (Teleostei: Clupeomorpha)
DownloadFall 2015
The Ellimmichthyiformes is an extinct order of clupeomorph fishes. This group includes fossil species from marine, estuarine, and freshwater sediments ranging in time from the Early Cretaceous to the Eocene. In spite of the long history of taxonomic studies on the Clupeomorpha, phylogenetic...
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Systematics of an Oligocene-Aged Fossil Snake Assemblage from the White River Formation, Wyoming
DownloadSpring 2014
Extinct snake taxa are primarily recognized from isolated vertebrae. A new specimen from the Oligocene of Wyoming provides a rare opportunity to examine four nearly complete and articulated fossil snakes. Informally assigned previously to the ‘erycine’ vertebral form taxa Ogmophis and...