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- W2296233826 abstract "Earliest records of the genus Spiticeras Uhlig in Western Gondwana are found in the Upper Jurassic–Lower Cretaceous deposits of the Vaca Muerta Formation in the Neuquen Basin, Argentina. Those records involve two species, Spiticeras acutum Gerth and Spiticeras hauthali Gerth, firstly described from Arroyo Durazno, Mendoza. A systematic revision and reconsideration of the biostratigraphic distribution of both species was performed on the basis of the study of type material and new bed by bed collections in the type locality and other southern Mendoza sections. S. acutum and S. hauthali display a succession of ornamentation stages that, together with other morphological characters, sustain their assignation to the genus Spiticeras. In addition, macroconchiate and microconchiate specimens were identified in both taxa. Record of S. acutum from the lowermost beds assigned to the Late Tithonian–Early Berrisian Substeueroceras koeneni Assemblage Biozone, allows extending downwards the known range of the species in the Neuquen Basin. Given that the basal portion of the S. koeneni Biozone can be correlated with the Late Tithonian Standard Durangites Zone and these early spiticeratins records have been found associated with a Late Tithonian secondary nannofossil bioevent (Raghodiscus asper first occurrence) in two of the studied sections, a Late Tithonian age is suggested for the earlier records of Spiticeras in Gondwana." @default.
- W2296233826 created "2016-06-24" @default.
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- W2296233826 date "2015-06-24" @default.
- W2296233826 modified "2023-09-30" @default.
- W2296233826 title "EARLIEST RECORDS OF THE GENUS SPITICERAS UHLIG IN THE NEUQUÉN BASIN, ARGENTINA: SYSTEMATIC AND BIOSTRATIGRAPHIC IMPLICATIONS -- Preprint doi:10.5710/AMGH.18.10.2016.3021" @default.
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