dc.contributor.author |
Benson, Richard H. |
en |
dc.date.accessioned |
2012-10-24T13:47:28Z |
|
dc.date.available |
2012-10-24T13:47:28Z |
|
dc.date.issued |
1977 |
|
dc.identifier.citation |
Benson, Richard H. 1977. <em><a href="https://doi.org/10.5479/si.00810266.33.1">Evolution of Oblitacythereis from Paleocosta (Ostracoda: Trachyleberididae) during the Cenozoic in the Mediterranean and Atlantic</a></em>. Washington, D.C.: Smithsonian Institution. <a href="https://doi.org/10.5479/si.00810266.33.1">https://doi.org/10.5479/si.00810266.33.1</a> |
en |
dc.identifier.uri |
http://hdl.handle.net/10088/19139 |
|
dc.identifier.uri |
http://dx.doi.org/10.5479/si.00810266.33.1 |
|
dc.description.abstract |
A new ostracode genus <I>Oblitacythereis</I> containing two new subgenera (the nominotypical form and the older <I>Paleoblitacythereis</I>) containing two new species (<I>O.</I> (<I>O.</I>) <I>mediterranea</I> and <I>O.</I> (<I>P.</I>) <I>luandaensis</I>) and one old species (new designation, <I>O.</I> (<I>P.</I>) <I>ruggierii</I> (Russo)) have been demonstrated to have descended from a common ancestral stock (new genus <I>Paleocosta</I>) of the genus <I>Costa</I>, the nominate form of the tribe Costini.<br/>This genus contains heavily costate species whose history has been one of invasion of the greater depths of Tethys, which became thermospheric in the middle Miocene. Species of subgenus <I>Paleoblitacythereis</I> became adapted to upper slope and warm basinal habitats and underwent considerable modification of its carapace structure. When Tethys became extinct as a marine environment at the end of the Miocene, subgenus <I>Paleoblitacythereis</I> was eradicated in the Mediterranean region but survived in the Atlantic, where it lives today. Its descendant subgenus <I>Oblitacythereis</I> invaded the newly formed Mediterranean in the Early Pliocene, structurally modified to live in cooler water.<br/>The history of <I>Oblitacythereis</I> was traceable because of a detailed analysis of structural and form homology, substantiated by quantitative Theta-Rho test. |
en |
dc.title |
Evolution of <I>Oblitacythereis</I> from <I>Paleocosta</I> (Ostracoda: Trachyleberididae) during the Cenozoic in the Mediterranean and Atlantic |
en |
dc.type |
Book, Whole |
en |
dc.identifier.srbnumber |
113453 |
|
dc.identifier.doi |
10.5479/si.00810266.33.1 |
|
dc.description.SIUnit |
SISP |
en |
dc.relation.url |
https://doi.org/10.5479/si.00810266.33.1 |
|