NEW PALEOCENE RHYNCHONELLIDE BRACHIOPODS FROM THE POTRERILLOS FORMATION, NORTHEAST MEXICO

Two new species of the rhynchonellid brachiopod Probolarina are described, Probolarina neoleonensis new species and Probolarina papalotensis new species. They were collected from a Paleocene limestone lens associated with a diapir in the La Popa basin, northeastern Mexico. Thousands of these brachio...

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Bibliographic Details
Published in:Journal of paleontology 2007-05, Vol.81 (3), p.483-489
Main Authors: KLOSTERMAN, SUSAN L, SANDY, MICHAEL R, VEGA, FRANCISCO J, GILES, KATHERINE A, GRAF, KYLE, SHELLEY, DAVID, SOLÉ, JESÚS
Format: Article
Language:English
Subjects:
Articulata
Basins
Brachiopoda
Cenozoic
Difunta Group
El Papalote Diapir
Invertebrata
invertebrate
La Popa Basin
lithostratigraphy
Mexico
morphology
new taxa
Nuevo Leon Mexico
Paleocene
Paleogene
Paleontology
Potrerillos Formation
Probolarina
Probolarina neoleonensis
Rhynchonellida
shells
Stratigraphy
taxonomy
Tertiary
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Summary:Two new species of the rhynchonellid brachiopod Probolarina are described, Probolarina neoleonensis new species and Probolarina papalotensis new species. They were collected from a Paleocene limestone lens associated with a diapir in the La Popa basin, northeastern Mexico. Thousands of these brachiopods occur in this lens and constitute the first report of brachiopods for the Difunta Group, from which a diverse paleobiota has been previously reported. This occurrence represents the oldest record for the genus in the Western Hemisphere, as the only other Paleocene occurence of this genus was reported from New Zealand. Recent studies suggest that the carbonate lentil from which the brachiopods were collected were deposited in the shadow-effect area adjacent to the diapir, which affected the sediment influx into the basin.
ISSN:0022-3360
1937-2337
DOI:10.1666/02084.1