Results 41 to 50 of about 2,040 (162)
Enamel Microstructure in Eocene Cetaceans from Antarctica (Archaeoceti and Mysticeti)
Journal of Mammalian Evolution, 2019 Modern baleen whales have no adult teeth, whereas dolphins and porpoises have a homodont and polydont dentition, with simplified enamel microstructure. However, archaic cetaceans (archaeocetes and early mysticetes and odontocetes) had a complex and ornamented dentition, with complex enamel microstructure as in terrestrial mammals.
Carolina Loch +4 more
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Structure of the cerebral cortex of the humpback whale,Megaptera novaeangliae (Cetacea, Mysticeti, Balaenopteridae) [PDF]
The Anatomical Record Part A: Discoveries in Molecular, Cellular, and Evolutionary Biology, 2006 AbstractCetaceans diverged from terrestrial mammals between 50 and 60 million years ago and acquired, during their adaptation to a fully aquatic milieu, many derived features, including echolocation (in odontocetes), remarkable auditory and communicative abilities, as well as a complex social organization. Whereas brain structure has been documented in
Patrick R, Hof, Estel, Van der Gucht
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A new species of Middle Miocene baleen whale from the Nupinai Group, Hikatagawa Formation of Hokkaido, Japan [PDF]
PeerJ, 2018 A fossil whale from the Hikatagawa Formation (Middle Miocene, 15.2–11.5 Ma) of Hokkaido, Japan is described as a new genus and species Taikicetus inouei and its phylogenetic position is examined.
Yoshihiro Tanaka +2 more
doaj +2 more sources
Cellular Composition of the Brain of a Northern Minke Whale. [PDF]
J Comp NeurolAvelino‐de‐Souza et al. show that the minke whale has 3.2 billion neurons in the cerebral cortex, as predicted for a generic cetartiodactyl species, which places it and other cetaceans between monkeys and great apes in a ranking of mammal and bird species by total numbers of neurons in the pallium/cerebral cortex.
Avelino-de-Souza K +4 more
europepmc +2 more sources
, 2005 MYSTICETI Flower 1864 Families: 4 families with 6 genera and 13 species: Family Balaenidae Gray 1821 (2 genera with 4 species) Family Balaenopteridae Gray 1864 (2 genera with 7 species and 8 subspecies) Family Eschrichtiidae Ellerman and Morrison-Scott 1951 (1 genus with 1 species) Family Neobalaenidae Gray 1873 (1 genus with 1 species)
Wilson, Don E., Reeder, DeeAnn
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BMC Ecology and Evolution, 2023 Modern baleen whales are unique as large-sized filter feeders, but their roles were replicated much earlier by diverse marine reptiles of the Mesozoic.
Zi-Chen Fang +8 more
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Big and Slow: Phylogenetic Estimates of Molecular Evolution in Baleen Whales (Suborder Mysticeti) [PDF]
Molecular Biology and Evolution, 2009 Baleen whales are the largest animals that have ever lived. To develop an improved estimation of substitution rate for nuclear and mitochondrial DNA for this taxon, we implemented a relaxed-clock phylogenetic approach using three fossil calibration dates: the divergence between odontocetes and mysticetes approximately 34 million years ago (Ma), between
J A, Jackson +5 more
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Coexistence of Oligocene toothed and baleen-assisted mysticetes in the northwestern Pacific [PDF]
Fossil RecordOligocene mysticetes display an unparalleled diversity and morphological disparity in the evolutionary history of Mysticeti. However, their paleoecological aspects, such as the patterns of coexistence of different morphotypes, remain poorly explored ...
Cheng-Hsiu Tsai +2 more
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Anatomy, feeding ecology, and ontogeny of a transitional baleen whale: a new genus and species of Eomysticetidae (Mammalia: Cetacea) from the Oligocene of New Zealand [PDF]
PeerJ, 2015 The Eocene history of cetacean evolution is now represented by the expansive fossil record of archaeocetes elucidating major morphofunctional shifts relating to the land to sea transition, but the change from archaeocetes to modern cetaceans is poorly ...
Robert W. Boessenecker, R. Ewan Fordyce
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Humpback Whale (Megaptera novaeangliae) Song on a Subarctic Feeding Ground
Frontiers in Marine Science, 2021 Male humpback whales (Megaptera novaeangliae) are known to produce long complex sequences of structured vocalizations called song. Singing behavior has traditionally been associated with low latitude breeding grounds but is increasingly reported outside ...
Saskia Cathrin Tyarks +6 more
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