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Late tremadocian graptolites from the Mojotoro Range, Argentine Eastern Cordillera
(Instituto Superior de Correlación Geológica, 2003)
The aim of this contribution is to make known a graptolite assemblage from the Upper Tremadocian coming from the Mojotoro Range on the southeast part of the Argentine Eastern Cordillera (Figure 1a,b). The fossiliferous ...
Late Cambrian – Tremadocian faunas and events from Angosto del Moreno Section, Eastern Cordillera, Argentina
(Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Superior de Correlación Geológica, 2003)
The Santa Victoria Group (SVG, late Upper Cambrian – Caradocian) comprises pre–Ashgillian Ordovician deposits of the Argentinean Eastern Cordillera. The most significant section of the SVG in the western flank of the Eastern ...
Trilobites and sedimentary facies of the upper Coquena Formation (late Tremadocian; Notopeltis orthometopa Zone), Cordillera Oriental, northwestern Argentina
(Association of Australasian Palaeontologists, 2016-05)
The area west of Purmamarca is a classic locality of the upper Tremadocian (Lower Ordovician) of the central Cordillera Oriental, northwestern Argentina. There, the upper member of the Coquena Formation documents the ...
Diversification of Asaphellus Callaway, 1877 (Asaphidae: Trilobita) during the Tremadocian in South West Gondwana (Cordillera Oriental, Argentina)
(Publications Scientifiques Du Museum, 2015-02)
Asaphellus Callaway, 1877 is the earliest widespread genus of the family Asaphidae Burmeister, 1843, and although its systematics bears several problematic issues, an input to overcome these difficulties has been attempted. ...
Phylogenetic analysis of the late Cambrian-early Ordovician genus Parabolinella Brøgger (Trilobita, Olenidae)
(John Wiley & Sons Ltd, 2013-03)
Phylogenetic relationships among species of the family Olenidae (Trilobita, Ptychopariida) were traditionally established by the direct comparison of morphological features and the evaluation of stratigraphic placement. ...
Broeggeria Walcott and other upper Cambrian and Tremadocian linguloid brachiopods from NW Argentina
(John Wiley & Sons Ltd, 2017-03)
The Broeggeria assemblage is a peculiar brachiopod association that has been recorded mainly from Tremadocian black shales of Baltoscandia, the Anglo-Welsh Basin, Nova Scotia, South Urals and Kazakhstan. Here, we report a ...
Lower Ordovician (late Tremadocian?- Floian) palynomorphs from the Llanos Basin, Colombia: Biostratigraphic and paleogeographic significance
(Elsevier Science, 2019-06)
Four core and fifteen cutting samples of well RH-2 from the Ordovician of the Llanos Basin, Colombia, were palynologically analyzed. They yielded mostly diverse and well-preserved marine palynomorph assemblages, dominated ...
Graptolite-trilobite biostratigraphy in the Santa Victoria area, northwestern Argentina. A key for regional and worldwide correlation of the Lower Ordovician (Tremadocian-Floian)
(Asociacion Paleontologica Argentina, 2015-10)
New graptolite-trilobite records provide relevant information for the biostratigraphic framework of the lower Paleozoic in western Gondwana. Aorograptus victoriae (T. S. Hall), together with Adelogratus cf. A. altus Williams ...
Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
(Paleontological Society, 2016-07)
The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and ...