The cenozoic fossil record of echinoids from Argentina is dominated by irregular echinoids, while regular echinoids are represented by scarce remains. In this regard, isolated plates, spines AND other fragments are known from the Roca (early Paleocene) and Monte León (early Miocene) formations. More complete specimens are known from the Roca, San Julián (late Oligocene) and El Chacay (early Miocene) formations. In this work, we present the first record of a regular echinoid from the Gaiman Formation (early Miocene). This marine unit is composed of whitish mudstones, fine sandstones and tuffaceous beds. The specimen was found in the lower levels of the exposures at Cerro Prismático locality.Fil: Allende, Aylén. Consejo Nacional de Investigac...
Despite being diverse globally, Miocene echinoids are poorly known from Jamaica. Moderately diverse ...
Body fossils of any group of starfish are rarely preserved; mostly they comprise dissociated ossicle...
As a consequence of the extremely poor fossil record of brittle stars, every new discovery is import...
Until now, the only fossil echinoderm described from the upper Miocene Paraná Formation of Argentina...
Stratigraphically well-constrained echinoids from the Roca Formation in the province of Rio Negro (P...
A new species of Ophioderma Müller and Troschel, 1842 is described. The new species is the first fos...
Martínez, Sergio, Del, Claudia J. (2008): A new, first fossil species of Ophioderma MHller and Trosc...
Neogene Argentinean echinoids are important biostratigraphic tools. New specimens of Schizaster iher...
A single 27 m2 spatangoid-dominated bed yielding 65 specimens from the Punta Entrada Member of the M...
Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossi...
A new species of monophorasterid sand dollar, Monophoraster telfordi n. sp., is described from the E...
Thefossil Asterozoa of Argentina have received scant attention. Marine rocks of Early Devonian-Late ...
The extensive Venezuelan coastline is very important for understanding the evolution of the Caribbea...
The fossil Asterozoa of Argentina have received scant attention. Marine rocks of Early Devonian-Late...
An study is accomplished over the Echinoids present in the Maestrazgo region in the Lower Cretaceous...
Despite being diverse globally, Miocene echinoids are poorly known from Jamaica. Moderately diverse ...
Body fossils of any group of starfish are rarely preserved; mostly they comprise dissociated ossicle...
As a consequence of the extremely poor fossil record of brittle stars, every new discovery is import...
Until now, the only fossil echinoderm described from the upper Miocene Paraná Formation of Argentina...
Stratigraphically well-constrained echinoids from the Roca Formation in the province of Rio Negro (P...
A new species of Ophioderma Müller and Troschel, 1842 is described. The new species is the first fos...
Martínez, Sergio, Del, Claudia J. (2008): A new, first fossil species of Ophioderma MHller and Trosc...
Neogene Argentinean echinoids are important biostratigraphic tools. New specimens of Schizaster iher...
A single 27 m2 spatangoid-dominated bed yielding 65 specimens from the Punta Entrada Member of the M...
Early Miocene sedimentary rocks of the lower part of the Monte Leon Formation are locally very fossi...
A new species of monophorasterid sand dollar, Monophoraster telfordi n. sp., is described from the E...
Thefossil Asterozoa of Argentina have received scant attention. Marine rocks of Early Devonian-Late ...
The extensive Venezuelan coastline is very important for understanding the evolution of the Caribbea...
The fossil Asterozoa of Argentina have received scant attention. Marine rocks of Early Devonian-Late...
An study is accomplished over the Echinoids present in the Maestrazgo region in the Lower Cretaceous...
Despite being diverse globally, Miocene echinoids are poorly known from Jamaica. Moderately diverse ...
Body fossils of any group of starfish are rarely preserved; mostly they comprise dissociated ossicle...
As a consequence of the extremely poor fossil record of brittle stars, every new discovery is import...
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