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Morphological and molecular evidence for a stepwise evolutionary transition from teeth to baleen in mysticete whales.
The origin of baleen in mysticete whales represents a major transition in the phylogenetic history of Cetacea. This key specialization, a keratinous sieve that enables filter-feeding, permitted… Expand
The Taxonomic and Evolutionary History of Fossil and Modern Balaenopteroid Mysticetes
Balaenopteroids (Balaenopteridae + Eschrichtiidae) are a diverse lineage of living mysticetes, with seven to ten species divided between three genera (Megaptera, Balaenoptera and Eschrichtius).… Expand
Abstract Previous hypotheses for the origin and diversification of pinnipeds have followed a narrative approach based mostly on dispersalist (i.e., center of origin) explanations. Using an analytical… Expand
A 130,000-year-old archaeological site in southern California, USA.
The earliest dispersal of humans into North America is a contentious subject, and proposed early sites are required to meet the following criteria for acceptance: (1) archaeological evidence is found… Expand
The Comparative Osteology of the Petrotympanic Complex (Ear Region) of Extant Baleen Whales (Cetacea: Mysticeti)
Background Anatomical comparisons of the ear region of baleen whales (Mysticeti) are provided through detailed osteological descriptions and high-resolution photographs of the petrotympanic complex… Expand
Skull anatomy of the Oligocene toothed mysticete Aetioceus weltoni (Mammalia; Cetacea): implications for mysticete evolution and functional anatomy
Toothed mysticetes of the family Aetiocetidae from Oligocene rocks of the North Pacific play a key role in interpretations of cetacean evolution because they are transitional in grade between… Expand
NEW SKELETAL MATERIAL OF THALASSOLEON (OTARIIDAE: PINNIPEDIA) FROM THE LATE MIOCENE-EARLY PLIOCENE (HEMPHILLIAN) OF CALIFORNIA
New crania, dentitions, and postcrania of the fossil otariid Thalassoleon mexicanus are described from the latest Miocene‐early Pliocene Capistrano Formation of southern California. Previous… Expand
The Miocene Pinniped Desmatophoca oregonensis Condon, 1906 (Mammalia: Carnivora), from the Astoria Formation, Oregon
New crania, dentitions, mandibles, and postcrania of the fossil pinniped Desmatophoca oregonensis Condon, 1906, are described from the Miocene Astoria Formation of the Newport Embayment, Lincoln… Expand
Magnetic Stratigraphy and Land Mammal Biochronology of the Nonmarine Facies of the Pliocene San Diego Formation, San Diego County, California
A reevaluation of Proneotherium repenningi from the Miocene Astoria Formation of Oregon and its position as a basal odobenid (Pinnipedia: Mammalia)
Abstract New crania, dentitions, and postcrania of the fossil pinniped, Proneotherium repenningi are described from the early to middle Miocene-age Astoria Formation of Lincoln County, Oregon. This… Expand