INSUGEO   12554
INSTITUTO SUPERIOR DE CORRELACION GEOLOGICA
Unidad Ejecutora - UE
artículos
Título:
THE UPPER TREMADOCIAN (ORDOVICIAN) GRAPTOLITE BRYOGRAPTUS: TAXONOMY, BIOSTRATIGRAPHY AND BIOGEOGRAPHY
Autor/es:
MALETZ, J.; EGENHOFF, S.; ALONSO, R.
Revista:
Paleontology
Editorial:
The Paleontological Association
Referencias:
Lugar: Wales; Año: 2010 vol. 53 p. 59 - 59
ISSN:
0038 6804
Resumen:
The taxonomy, biostratigraphical and palaeogeographical distribution of the Lower Ordovician graptolite genus Bryograptus is evaluated. Bryograptus is recognized as a distinct triradiate anisograptid with a multiramous, pendent rhabdosome. The species of the genus Bryograptus can be interpreted as shallow water faunal elements with a strongly limited biogeographical distribution to the Atlantic Faunal Realm. Bryograptus is restricted to a narrow interval in the Upper Tremadocian, the Bryograptus Biozone of Scandinavia and South America (Argentina), making it a taxon with a high potential for precise biostratigraphical correlations. The proximal end development can be used to differentiate the genus ryograptus from other pendent multiramous graptoloid genera with a homoplastic rhabdosome development. Characteristics of the proximal end development and structure easily differentiate these genera in relief specimens, but not in flattened material.
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