IANIGLA   20881
INSTITUTO ARGENTINO DE NIVOLOGIA, GLACIOLOGIA Y CIENCIAS AMBIENTALES
Unidad Ejecutora - UE
capítulos de libros
Título:
Fossil sponges of Argentina: a review
Autor/es:
BERESI, M.S.
Libro:
Porifera Research - Biodiversity, Innovation and Sustainability
Editorial:
Museo Nacional, Río de Janeiro
Referencias:
Lugar: Rio de Janeiro; Año: 2007; p. 12 - 23
Resumen:
Abstract: This is a review on fossil sponges and sponge spicules reported from several regions in Argentina and in strata ranging in age from Early Cambrian to Tertiary. Sponges have been collected from marine sediments of the Puna, Cordillera Oriental and Sierras Subandinas basins, northern Argentina; Famatina Range; Precordillera terrane, San Rafael block, Neuquén basin and from lacustrine deposits of the North Patagonian Massif. Knowledge of the sponge fossil record is based on whole relatively rigid skeletons, fragments of skeletal nets and spicules seen in thin sections or recovered from acetic acid residues. Early to Middle Cambrian Porifera and Chancelloriids are known from the carbonate platform and slope facies of the Precordillera terrane. Specimens with body preservation of Protospongia, Diagoniella, Kiwetinokia, fragments of hexactinellid, and anthaspidellid sponges and sclerites of Chancelloria had been reported from Cambrian of the Precordillera. Remains of hexactinellid sponges, Pelicaspongiidae and Protospongiidae, have been found in Ordovician rocks of the Puna and of the Famatina System, western margin of Gondwana. Protospongia sp. and hexactinellid mesh were reported from Upper Cambrian-Lower Ordovician siliciclasticsediments in the Cordillera Oriental and Sierras Subandinas. The most significant fossil record of Lower-Middle Ordovician sponge faunas is from the carbonate platform of the San Juan Precordillera. Sponge faunas are dominated by orchoclad lithistid demosponge genera, although hexactinellids are known from loose spicules and root tufts, and calcareous heteractinid sponges are known from isolated octactine spicules and only one genus. Hexactinellid, calcarean and demosponge spicules were reported from diverse localities of the Precordillera. A Late Jurassic (Oxfordian) carbonate complex of the Neuquén Basin, west-central Argentina, contains siliceous sponges dominated by hexactinellids (Hexactinosa and Lyssakinosa). Palaeospongilla chubutensis, a fresh water sponge, was described from lacustrine Cretaceous deposits of the Chubut River valley. Oxeas and strongyles, belonging to the Family Spongillidae, have been mentioned fromTertiary sediments of the Paraná basin, northeastern Argentina.This is a review on fossil sponges and sponge spicules reported from several regions in Argentina and in strata ranging in age from Early Cambrian to Tertiary. Sponges have been collected from marine sediments of the Puna, Cordillera Oriental and Sierras Subandinas basins, northern Argentina; Famatina Range; Precordillera terrane, San Rafael block, Neuquén basin and from lacustrine deposits of the North Patagonian Massif. Knowledge of the sponge fossil record is based on whole relatively rigid skeletons, fragments of skeletal nets and spicules seen in thin sections or recovered from acetic acid residues. Early to Middle Cambrian Porifera and Chancelloriids are known from the carbonate platform and slope facies of the Precordillera terrane. Specimens with body preservation of Protospongia, Diagoniella, Kiwetinokia, fragments of hexactinellid, and anthaspidellid sponges and sclerites of Chancelloria had been reported from Cambrian of the Precordillera. Remains of hexactinellid sponges, Pelicaspongiidae and Protospongiidae, have been found in Ordovician rocks of the Puna and of the Famatina System, western margin of Gondwana. Protospongia sp. and hexactinellid mesh were reported from Upper Cambrian-Lower Ordovician siliciclasticsediments in the Cordillera Oriental and Sierras Subandinas. The most significant fossil record of Lower-Middle Ordovician sponge faunas is from the carbonate platform of the San Juan Precordillera. Sponge faunas are dominated by orchoclad lithistid demosponge genera, although hexactinellids are known from loose spicules and root tufts, and calcareous heteractinid sponges are known from isolated octactine spicules and only one genus. Hexactinellid, calcarean and demosponge spicules were reported from diverse localities of the Precordillera. A Late Jurassic (Oxfordian) carbonate complex of the Neuquén Basin, west-central Argentina, contains siliceous sponges dominated by hexactinellids (Hexactinosa and Lyssakinosa). Palaeospongilla chubutensis, a fresh water sponge, was described from lacustrine Cretaceous deposits of the Chubut River valley. Oxeas and strongyles, belonging to the Family Spongillidae, have been mentioned fromTertiary sediments of the Paraná basin, northeastern Argentina.
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