The first report of South American edrioasteroids and the paleoecology and ontogeny of rhenopyrgid echinoderms

• Autorzy: Sumrall C.D. , Heredia S. , Rodriguez C. M. , Mestre A. I.
• Języki publikacji: EN

Abstrakty

EN

A new species of rhenopyrgid edrioasteroid Rhenopyrgus piojoensis sp. nov. is described form the Silurian (Lower Ludlow) Los Espejos Formation in the Precordillera of Argentina. This species is the first reported edrioasteroid from South America. Rhenopyrgids are widely distributed in Ordovician through Devonian deposits of most continents. Numerous juvenile specimens show that the general bodyplan is organized early in ontogeny and that the pedenculate zone lengthens with age. Phylogenetic analysis shows that rhenopyrgids are more closely related to edrioasterid edrioasteroids such as edrioblastoids and cyathocystids than to pyrgocystid isorophids.

• Wydawca: -
• Czasopismo: Acta Palaeontologica Polonica
• Rocznik: 2013
• Tom: 58
• Numer: 4
• Opis fizyczny: p.763-776,fig.,ref.

Twórcy

autor

Sumrall C.D.

• Department of Earth and Planetary Sciences, University of Tennessee, Knoxville, 37996, USA

autor

Heredia S.

• CONICET, Instituto de Investigaciones Mineras, Universidad de San Juan, Urquiza y Liberador, 5400, San Juan, Argentina

autor

Rodriguez C. M.

• CONICET, Instituto de Investigaciones Mineras, Universidad de San Juan, Urquiza y Liberador, 5400, San Juan, Argentina

autor

Mestre A. I.

• CONICET, Instituto de Investigaciones Mineras, Universidad de San Juan, Urquiza y Liberador, 5400, San Juan, Argentina

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