DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS
The Santa Cruz Formation (Early–Middle Miocene) is one of the most widespread sedimentary units of the Argentine Patagonia. This unit contains an abundant and taxonomically diverse fossil vertebrate fauna, especially in mammals. Thus, the paleoecological and paleoenvironmental information derives ma...
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Asociación Paleontológica Argentina
2019-12-01
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| Series: | Publicación Electrónica de la Asociación Paleontológica Argentina |
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| Online Access: | https://www.peapaleontologica.org.ar/index.php/peapa/article/view/283 |
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| author | Leandro Martín Pérez José Ignacio Cuitiño Augusto Nicolás Varela Nahuel Antú Muñoz |
| author_facet | Leandro Martín Pérez José Ignacio Cuitiño Augusto Nicolás Varela Nahuel Antú Muñoz |
| author_sort | Leandro Martín Pérez |
| collection | DOAJ |
| description | The Santa Cruz Formation (Early–Middle Miocene) is one of the most widespread sedimentary units of the Argentine Patagonia. This unit contains an abundant and taxonomically diverse fossil vertebrate fauna, especially in mammals. Thus, the paleoecological and paleoenvironmental information derives mainly from the analysis of the vertebrate assemblages, as well as from the ichnological and paleobotanical evidence. The record of freshwater bivalves assigned to the species Diplodon cf. colhuapiensis Ihering, 1903 from the Santa Cruz Formation, collected in the locality of Barrancas Blancas (Estancia Santa Lucía), at Río Santa Cruz, allows us to infer the particular paleoenvironmental conditions setting during the deposition of the bearing levels. Considering this record, we propose that Diplodon, which was originally assigned to the “Sehuenense stage” (piso sehuenense of F. Ameghino), could have come from the Early–Middle Miocene of the Santa Cruz Formation. In this sense, the specimens referred to Diplodon cf. colhuapiensis suggest the existence of an established community of Hyriidae mollusks at the upper-middle levels of the Santa Cruz Formation. The presence of freshwater bivalves suggests that the depositional environment of this unit included the existence of water courses. The identification of the genus in the Santa Cruz Formation validates its presence in the Early Miocene and extends its southern distribution to the latitude of Río Santa Cruz (~ 50o S). |
| first_indexed | 2024-12-20T00:36:03Z |
| format | Article |
| id | doaj.art-96172141322d41c1b1cf1a8811a674a6 |
| institution | Directory Open Access Journal |
| issn | 2469-0228 |
| language | English |
| last_indexed | 2024-12-20T00:36:03Z |
| publishDate | 2019-12-01 |
| publisher | Asociación Paleontológica Argentina |
| record_format | Article |
| series | Publicación Electrónica de la Asociación Paleontológica Argentina |
| spelling | doaj.art-96172141322d41c1b1cf1a8811a674a62022-12-21T19:59:45ZengAsociación Paleontológica ArgentinaPublicación Electrónica de la Asociación Paleontológica Argentina2469-02282019-12-01192DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONSLeandro Martín Pérez0José Ignacio Cuitiño1Augusto Nicolás Varela2Nahuel Antú Muñoz3CONICET - Museo de La Plata, La Plata, ArgentinaInstituto Patagónico de Geología y Paleontología (IPGP) CCT CONICET-CENPAT, Puerto Madryn, Chubut, ArgentinaFacultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata Argentina | Y-TEC S.A. - CONICET, Berisso, ArgentinaCONICET – Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata, La Plata ArgentinaThe Santa Cruz Formation (Early–Middle Miocene) is one of the most widespread sedimentary units of the Argentine Patagonia. This unit contains an abundant and taxonomically diverse fossil vertebrate fauna, especially in mammals. Thus, the paleoecological and paleoenvironmental information derives mainly from the analysis of the vertebrate assemblages, as well as from the ichnological and paleobotanical evidence. The record of freshwater bivalves assigned to the species Diplodon cf. colhuapiensis Ihering, 1903 from the Santa Cruz Formation, collected in the locality of Barrancas Blancas (Estancia Santa Lucía), at Río Santa Cruz, allows us to infer the particular paleoenvironmental conditions setting during the deposition of the bearing levels. Considering this record, we propose that Diplodon, which was originally assigned to the “Sehuenense stage” (piso sehuenense of F. Ameghino), could have come from the Early–Middle Miocene of the Santa Cruz Formation. In this sense, the specimens referred to Diplodon cf. colhuapiensis suggest the existence of an established community of Hyriidae mollusks at the upper-middle levels of the Santa Cruz Formation. The presence of freshwater bivalves suggests that the depositional environment of this unit included the existence of water courses. The identification of the genus in the Santa Cruz Formation validates its presence in the Early Miocene and extends its southern distribution to the latitude of Río Santa Cruz (~ 50o S).https://www.peapaleontologica.org.ar/index.php/peapa/article/view/283DiplodonHyriidaeSehuenense stageNeogeneSanta Cruz FormationArgentine Patagonia |
| spellingShingle | Leandro Martín Pérez José Ignacio Cuitiño Augusto Nicolás Varela Nahuel Antú Muñoz DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS Publicación Electrónica de la Asociación Paleontológica Argentina Diplodon Hyriidae Sehuenense stage Neogene Santa Cruz Formation Argentine Patagonia |
| title | DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS |
| title_full | DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS |
| title_fullStr | DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS |
| title_full_unstemmed | DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS |
| title_short | DIPLODON CF. COLHUAPIENSIS (BIVALVIA, HYRIIDAE) IN THE SANTA CRUZ FORMATION (EARLY–MIDDLE MIOCENE) AT THE RÍO SANTA CRUZ, PATAGONIA, ARGENTINA. STRATIGRAPHIC AND PALEOENVIRONMENTAL CONSIDERATIONS |
| title_sort | diplodon cf colhuapiensis bivalvia hyriidae in the santa cruz formation early middle miocene at the rio santa cruz patagonia argentina stratigraphic and paleoenvironmental considerations |
| topic | Diplodon Hyriidae Sehuenense stage Neogene Santa Cruz Formation Argentine Patagonia |
| url | https://www.peapaleontologica.org.ar/index.php/peapa/article/view/283 |
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