Results 171 to 180 of about 5,019 (222)
Some of the next articles are maybe not open access.
Trends in Ecology & Evolution, 1996
The discovery of fossilized conodont soft tissues has led to suggestions that these enigmatic animals were among the earliest vertebrates and that they were macrophagous, using their oropharyngeal skeletal apparatus to capture and process prey. These conclusions have proved controversial.
Aldridge, RJ, Purnell, MA
openaire +3 more sources
The discovery of fossilized conodont soft tissues has led to suggestions that these enigmatic animals were among the earliest vertebrates and that they were macrophagous, using their oropharyngeal skeletal apparatus to capture and process prey. These conclusions have proved controversial.
Aldridge, RJ, Purnell, MA
openaire +3 more sources
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
openaire +1 more source
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
openaire +1 more source
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’
openaire +2 more sources
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’
openaire +2 more sources
Permian conodont biostratigraphy
Geological Society, London, Special Publications, 2016Abstract Forty Permian conodont biozones are summarized and 35 additional regional zones are correlated. The Lower Permian is largely zoned on the basis of partial range lineage interval zones of species of Streptognathodus , Sweetognathus , Neostreptognathodus
openaire +1 more source
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
openaire +3 more sources
Conodonter – geologiske termometre
Varv, 1994Intet ...
Svend Stouge Stouge, Jan Audun Rasmussen
openaire +1 more source
Carboniferous Conodonts: ABSTRACT
AAPG Bulletin, 1980Our understanding of Carboniferous conodont faunas has been significantly advanced in the last several years because of increased interest in these microfossils. Although numerous biostratigraphic zonations have been proposed, especially in the lower Carboniferous, variations in taxonomic and zonal approach preclude a unified worldwide zonation at this
openaire +1 more source
Lethaia, 1979
There are close similarities between conodont elements and teeth both in general shape and in that they possess pointed tips and have expanded bases with more porous tissue. A number of examples of conodont elements which parallel specific kinds of tooth shapes and organizations are added to earlier known similarities.
openaire +1 more source
There are close similarities between conodont elements and teeth both in general shape and in that they possess pointed tips and have expanded bases with more porous tissue. A number of examples of conodont elements which parallel specific kinds of tooth shapes and organizations are added to earlier known similarities.
openaire +1 more source
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 ...
openaire +1 more source