Results 171 to 180 of about 8,052 (221)
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Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 1993
Abstract Specimens from the Carboniferous Granton shrimp bed of Edinburgh, Scotland, provide the most complete record of conodont anatomy. Ten specimens are now known, six of which are previously undescribed, and form the basis of a new description and restoration of the conodont animal.
ALDRIDGE, RJ +4 more
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Abstract Specimens from the Carboniferous Granton shrimp bed of Edinburgh, Scotland, provide the most complete record of conodont anatomy. Ten specimens are now known, six of which are previously undescribed, and form the basis of a new description and restoration of the conodont animal.
ALDRIDGE, RJ +4 more
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Lethaia, 1983
A unique specimen of a small, elongate, soft-bodied animal from the Lower Carboniferous of the Edinburgh district, Scotland, is described. The head expands anteriorly into two lobate structures flanking a central lumen; behind this lies a conodont apparatus, apparently in situ, consisting of an aligned set of ramiform elements followed by a pair of ...
Derek E. G. Briggs +2 more
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A unique specimen of a small, elongate, soft-bodied animal from the Lower Carboniferous of the Edinburgh district, Scotland, is described. The head expands anteriorly into two lobate structures flanking a central lumen; behind this lies a conodont apparatus, apparently in situ, consisting of an aligned set of ramiform elements followed by a pair of ...
Derek E. G. Briggs +2 more
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Conodont affinity and chordate phylogeny
Biological Reviews of the Cambridge Philosophical Society, 2000ABSTRACTCurrent information on the conodontsClydagnathus windsorensis(Globensky) andPromissum pulchrumKovács‐ Endrödy, together with the latest interpretations of conodont hard tissues, are reviewed and it is concluded that sufficient evidence exists to justify interpretation of the conodonts on a chordate model.
Donoghue, PCJ, Forey, PL, Aldridge, RJ
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Conodonts and Biostratigraphic Correlation
Annual Review of Earth and Planetary Sciences, 1986At its 1969 meeting, The Pander Society convened a symposium on conodont biostratigraphy that resulted in a volume (Sweet & Bergstrom 1971a) in which specialists systematically summarized the status of conodont-based biostratigraphy up to 1969. One function of such a volume is to direct attention to areas that need more work and to focus on conclusions
Walter C. Sweet, Stig M. Bergstrom
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Geology Today, 2015
Conodonts were small, thin, elongate jawless creatures that were a common component of the marine fauna from the late Cambrian, throughout the Palaeozoic and into the Triassic. For the majority of conodont research history, speculations on conodont affinity were restricted to the histology and arrangement of their mineralized tissues—‘conodont elements’
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Conodonts were small, thin, elongate jawless creatures that were a common component of the marine fauna from the late Cambrian, throughout the Palaeozoic and into the Triassic. For the majority of conodont research history, speculations on conodont affinity were restricted to the histology and arrangement of their mineralized tissues—‘conodont elements’
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Geological Society of America Bulletin, 1969
The known distribution of conodonts in the Cambrian of Europe, Asia, and North America is not uniform, but no major discrepancies in stratigraphic range of form species has been noted. The oldest reliably dated conodont known is a Hertzina species which is known in upper Middle Cambrian rocks in Nevada and Bornholm (Denmark).
DAVID L. CLARK, JAMES F. MILLER
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The known distribution of conodonts in the Cambrian of Europe, Asia, and North America is not uniform, but no major discrepancies in stratigraphic range of form species has been noted. The oldest reliably dated conodont known is a Hertzina species which is known in upper Middle Cambrian rocks in Nevada and Bornholm (Denmark).
DAVID L. CLARK, JAMES F. MILLER
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On the Affinities of Conodonts
1972Conodonts are phosphatic, denticulated structures in the average size range from 0.1 to 1 mm. They grew by the centrifugal accretion of lamellae. Conodonts are a homogeneous group. Basic interpretations must apply to all kinds of conodonts. Internal and outer morphologic features indicate that they were skeletal elements designed to lend a certain ...
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Conodonts through time and space: Studies in conodont provincialism
1984A computerized file of approximately twenty thousand records of conodont occurrences was used in a quantitative study of conodont provincialism. Although biases in the fossil record, in specimen collection, and in data collection preclude any rigid statistical testing, study of quantitative measures of similarity between faunas, when combined with ...
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