A review of the endocerid cephalopod Protocyptendoceras from the Floian [Lower Ordovician] of the Eastern Cordillera, Argentina

• Autorzy: Cichowolski M
• Języki publikacji: EN

Abstrakty

EN

Ordovician cephalopods from Western Gondwana are still poorly known and published data is in need of systematic and stratigraphical revision. In this work, the endocerid proterocameroceratid Protocyptendoceras from the Floian of the Eastern Cordillera of Argentina is revised using new material from La Ciénaga, 5 km upstream from Purmamarca. The species P. corvalani and P. teicherti are considered to be junior synonyms of P. fuenzalidae, which is redescribed in detail and reillustrated. Specimens preserve adapical parts of isolated siphuncles, related here to the presence of endocones in a posterior portion. Evidently P. fuenzalidae had a nektobenthic mode of life in a shallow water environment, oriented horizontally. Its palaeobiogeographical affinities are mainly with Floian proterocameroceratids from Eastern Gondwana, such as Anthoceras decorum and the related genera Lobendoceras, Ventroloboceras, and Notocycloceras.

Słowa kluczowe

EN

Cephalopoda; Floian; endocerid cephalopod; paleontology; cephalopod; Ordovician; Lower Ordovician; Proterocameroceratidae; Endocerida; Argentina

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2009
• Tom: 54
• Numer: 1
• Opis fizyczny: p.99-109,fig.,ref.

Twórcy

autor

Cichowolski M

• Universidad de Buenos Aires, Ciudad Universitaria, Pab.II, Intendente Guiraldes 2160 C1428EGA, Buenos Aires, Argentina

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