首页|Echinoderms from the upper Miocene Parana Formation of Argentina
Echinoderms from the upper Miocene Parana Formation of Argentina
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NSTL
Taylor & Francis
Until now, the only fossil echinoderm described from the upper Miocene Parana Formation of Argentina was the scutelliform Monophoraster duboisi. Here, we substantially increase this diversity by recording the ophiuroids Ophiocoma sp. and Ophiothrix sp., together with irregular echinoids including an immature indeterminate neognathostome, Abertella sp., Amplaster alatus, and Amplatser ellipticus. This revised taxonomic richness is concordant with a warm-water shoreface depositional environment. Our new records of Amplaster and Monophoraster represent the most northerly occurrences of their known geographic range. Likewise, we extend the Argentine distribution of Abertella some 1500 km further north, and identify the first upper Miocene example of the genus. The Argentine Parana Formation echinoderm assemblage is thus similar to that from the coeval Camacho Formation of Uruguay.
NSTL
Taylor & Francis
