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| Ottone,Eduardo G.; Mancuso,Adriana C.; Resano,Magdalena. |
| Lacustrine strata of the Los Rastros Formation (Middle to Upper Triassic) at Río Gualo section (La Rioja province), yield a distinctive palynological assemblage of miospores and chlorococcalean algae. The miospore association is characterized by a relative abundance of corystosperm pollen grains with subordinate inaperturates, diploxylonoid disaccates, spores, monocolpates, monosaccates and striate pollen grains. The phytoplankton are mostly represented by Botryococcus but also by Plaesiodictyon , a form probably related to the Hydrodictyaceae. Geological data and variations in phytoplankton content indicate that the lacustrine system probably evolved from a stretcht of freshwater with eutrophic conditions, into a body with oligotrophic conditions through... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Argentina; Triassic; Miospores and chlorococcalean algae; Systematics; Lacustrine environment. |
| Ano: 2005 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142005000200007 |
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| Martins-Neto,Rafael Gioia; Gallego,Oscar F.; Mancuso,Adriana C.. |
| New fossil insect taxa from the Los Rastros Formation (early Late Triassic), La Rioja Province (Argentina) are described. Four new genera and fourteen new species of the order Coleoptera are proposed: Ademosyne arcucciae Martins-Neto and Gallego sp. nov., Ademosyne elongatus Martins-Neto and Gallego sp. nov., Ademosyne hexacostata Martins-Neto and Gallego sp. nov., Ademosyne punctuada Martins-Neto and Gallego sp. nov., Argentinosyne frenguellii Martins-Neto and Gallego gen. et sp. nov., Argentinosyne gonaldiae Martins-Neto and Gallego sp. nov., Argentinosyne gualoensis Martins-Neto and Gallego sp. nov., Argentinosyne rugosa Martins-Neto and Gallego sp. nov., Argentinosyne losrastrosensis Martins-Neto and Gallego sp. nov., (Permosynidae Tillyard),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Triassic insects; Coleoptera; Los Rastros Formation; Argentina. |
| Ano: 2006 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0002-70142006000300007 |
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