Results 291 to 300 of about 66,624 (345)
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Science, 1974
Collections of well-preserved angiosperm flowers from the Middle Eocene of southeastern North America include a variety of morphological types. The first of these specimens to be studied extensively, a catkin, has yielded a great deal of structural information. Floral morphology, pollen morphology, and the nature of the peltate scales suggest that this
W L, Crepet, D L, Dilcher, F W, Potter
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Collections of well-preserved angiosperm flowers from the Middle Eocene of southeastern North America include a variety of morphological types. The first of these specimens to be studied extensively, a catkin, has yielded a great deal of structural information. Floral morphology, pollen morphology, and the nature of the peltate scales suggest that this
W L, Crepet, D L, Dilcher, F W, Potter
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Science, 1963
Fossil fungi belonging to the Meliolaceae and Microthyriaceae were found in Eocene deposits in Tennessee. Germinated spores for each form of fungus were identified. One of the two forms of the genus Meliola , (Meliolaceae) appears to have parasitized the leaf upon which it grew.
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Fossil fungi belonging to the Meliolaceae and Microthyriaceae were found in Eocene deposits in Tennessee. Germinated spores for each form of fungus were identified. One of the two forms of the genus Meliola , (Meliolaceae) appears to have parasitized the leaf upon which it grew.
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2023
Abstract Most ideas about cortical evolution depend on the textbook view of cortical organization: that it comprises visual, auditory, somatosensory, motor, association, and limbic areas. A more parsimonious idea is that all cortical areas specialize in representing conjunctions of information.
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Abstract Most ideas about cortical evolution depend on the textbook view of cortical organization: that it comprises visual, auditory, somatosensory, motor, association, and limbic areas. A more parsimonious idea is that all cortical areas specialize in representing conjunctions of information.
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Eocene evolution of whale hearing
Nature, 2004The origin of whales (order Cetacea) is one of the best-documented examples of macroevolutionary change in vertebrates. As the earliest whales became obligately marine, all of their organ systems adapted to the new environment. The fossil record indicates that this evolutionary transition took less than 15 million years, and that different organ ...
Sirpa, Nummela +4 more
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Palaeobiodiversity and Palaeoenvironments, 2012
The mammalian order Primates made its first appearance in the fossil record during the Paleocene–Eocene thermal maximum (PETM), the global greenhouse warming event that marks the beginning of the Eocene. Two primate superfamilies, Tarsioidea and Adapoidea, dominate early and middle Eocene primate faunas.
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The mammalian order Primates made its first appearance in the fossil record during the Paleocene–Eocene thermal maximum (PETM), the global greenhouse warming event that marks the beginning of the Eocene. Two primate superfamilies, Tarsioidea and Adapoidea, dominate early and middle Eocene primate faunas.
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Eocene Volcanism and the Origin of Horizon A
Science, 1971A series of closely time-equivalent deposits that correlate with seismic reflector horizon A exists along the coast of eastern North America. These sediments of Late-Early to Early-Middle Eocene age contain an authigenic mineral suite indicative of the alteration of volcanic glass.
T G, Gibson, K M, Towe
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The Tarsus of Early Eocene Artiodactyls
Journal of Mammalogy, 1968The tarsi of two genera of early Eocene artiodactyls, Bunophorus and Diacodexis, are described. Both possess only four toes, with digits II and V reduced to the status of dew claws. It is suggested that in some lineages of artiodactyls the evolutionary tendency to reduce digits II and V was reversed and that these toes were enlarged, resulting in forms
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Eocene Radiation and Phylogeny of the Rodents
Evolution, 1959The problems of the classification and evolution of the rodents continue to provide a basis for disagreement among students of the group. This is because of the considerable number of forms involved, and because of the unquestioned parallelism which has occurred in the evolution of members of the order.
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