Paleontología de una sección del río Corredores, formación Curré, Mioceno, Costa Rica

Aguilar, Teresita; Acevedo, Benjamín; Ulloa, Andrés

doi:10.15517/rgac.v0i42.4170

Cited by 4 publications

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“…The Miocene macrofossils are associated with typical assemblages from the Caribbean (Table 2). These macrofossil assemblages in Old Providence have been reported in Panama in different stratigraphic sections (Gatún and Culebra formations; Vaughan 1919; Woodring 1957, 1959a, 1959b, 1964), Costa Rica (Punta Pelada Formation), and the Colombian Caribbean (Table 1) (Vaughan 1919; Weisbord 1929; Aguilar 1999; Aguilar et al 2010). Whereas the coral assemblages from Manzanillo are very similar to the ones recently reported in the Guajira Peninsula (Siamana and Jimol formations; Florez et al 2016).…”

Section: Resultssupporting

confidence: 70%

Miocene Fossils of Old Providence Island (Western Caribbean, Colombia) and Geological Heritage of the Seaflower Biosphere Reserve

Gómez,

Camargo,

Parada

2023

Caribbean Journal of Science

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This study presents a geological survey of the Miocene sedimentary record from Old Providence Island (Western Caribbean, Colombia). New fossil material, primarily consisting of coralline remains, bivalves, gastropods, and echinoids, was collected and analyzed. Despite the varying degrees of preservation, a taxonomic description and some paleobiogeographic remarks are provided. The coralline fragments represent specimens of Siderastrea siderea, Acropora spp., Orbicella spp., and the families Caryophylliidae, Poritidae, Turbinoliidae, Mussidae, Pocilloporidae, and Agariciidae. The gastropods are represented by the genera Turritella, Solariella, Calliostoma, and Polinices, while the bivalves included Cardita, Chlamys, Pecten, Crenella, Trivia?, Ostrea, Argopecten, and Caribachlamys. In general, these macrofossils suggest a shallow reef environment, consistent with preliminary reports from Old Providence and more comprehensive descriptions from neighboring islands (San Andrés Island and Jamaica) and Miocene sites across the Caribbean (Panama and Colombia). Additionally, an assessment of the localities, as geological sites of interest, was conducted to promote interest given the limited awareness of the island's natural history among local communities and tourists. The collected paleofauna and our evaluation of the Miocene localities present a promising opportunity for promoting the biological and geological heritage of this region within the Caribbean realm. resumen-Se presentan los resultados de la prospección geológica del registro sedimentario del Mioceno en la Isla de Providencia (Caribe Occidental, Colombia). Material fósil fue colectado y analizado, correspondiendo principalmente a fragmentos coralinos, bivalvos, gasterópodos y equinodermos. A pesar del heterogéneo estado de preservación del material colectado, observaciones taxonómicas y paleobiogeográficas fueron realizadas. Los fragmentos coralinos comprendieron especímenes de Siderastrea siderea, Acropora spp., Orbicella spp., así como las familias Caryophylliidae, Poritidae, Turbinoliidae, Mussidae, Pocilloporidae y Agariciidae. Los gasterópodos correspondieron a especímenes de los géneros Turritella, Solariella, Calliostoma y Polinices, mientras que los restos de bivalvos estuvieron representados por Cardita, Chlamys, Pecten, Crenella, Trivia?, Ostrea, Argopecten y Caribachlamys. En general los macrofósiles colectados sugieren un ambiente marino somero, coincidiendo con interpretaciones previas en Providencia, y descripciones más detalladas en las sucesiones miocénicas de islas cercanas (San Andrés y Jamaica) y de localidades en el caribe continental (Panamá y Colombia). Adicionalmente, fue realizada una valoración de las secciones estudiadas en Providencia como sitios de interés geológico y su futura conservación. Teniendo en cuenta el tipo de información encontradas, y las particularidades de la isla, el material miocénico de la Providencia comprende una oportunidad prometedora para promover el patrimonio biológico y geológico de esta parte de la región...

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Section: Resultssupporting

confidence: 70%

Miocene Fossils of Old Providence Island (Western Caribbean, Colombia) and Geological Heritage of the Seaflower Biosphere Reserve

Gómez,

Camargo,

Parada

2023

Caribbean Journal of Science

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“…Charco Azul is of interest within this area because the rst gold concentrations of the Golfo Dulce have been found in its basal sediments (Kriz 1990). Fossil organisms of the families Naticidae, Buccinidae, Muricidae, Cancellariidae, Melongenidae, and Terebridae have been found in the Charco Azul group (Aguilar et al 2010). In our study, only the family Muricidae was present.…”

Section: Discussionmentioning

confidence: 99%

Shallow gas seeps in the Golfo Dulce, South Pacific of Costa Rica: geological, physicochemical, and biological characterization

Salas,

Alvarado,

Solano

et al. 2023

Preprint

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Methane is a greenhouse gas with a heat absorption capacity 25 times greater than CO2, potentially playing a significant role at the atmospheric level. Thus there is a growing interest about studying the diversity and ecology of habitats that are important contributors of this gas to the atmosphere. This research aims to carry out a geological, physicochemical, and biological description of a superficial gas seepage in the tropical waters of the Golfo Dulce in Costa Rica. To study this environment underwater visual censuses of fish and bottom cover were conducted, along with collection of water samples for nutrient analysis, and gas to determine the composition of emissions. In addition, rock samples were collected to determine the geological origin and the associated cryptofauna. The seeps are composed of 49.5% methane and the rock that makes up the platform is sandstone from the Charco Azul Group. The bottom cover is dominated by sand (20%), hydrozoans (18%), and 12% of the «other» category. A total of 18 species of fish were found, and wrasses (Labridae) were the dominant group. Regarding cryptofauna, a total of 93 taxa were recorded. This study presents a new report of the ghost shrimp Biffarius for the Eastern Tropical Pacific. This ecosystem presents unique features because it is a shallow, highly diverse place, with a structure of the biological community different from what it is known for the Pacific coast of Costa Rica and the region. Knowing the above, it is recommended to establish conservation strategies.

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“…Upper Curré Formation, Upper Miocene. For further information about the stratigraphic position of the Curré Formation, see these references: Lowery 1982; Yuan 1984; Rivier 1985; Kolarsky et al 1995; Alvarado et al 2009; Aguilar et al 2010; Obando 2011. There are no absolute ages for this geological unit.…”

Section: Systematic Palaeontologymentioning

confidence: 99%

Systematic revision and redefinition of the genus Scirrotherium Edmund and Theodor, 1997 (Cingulata, Pampatheriidae): Implications for the origin of pampatheriids and the evolution of the South American lineage including Holmesina

Jiménez-Lara

2019

Preprint

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The intrageneric relationships of the pampatheriid genus Scirrotherium and its affinities with supposedly related genera, i.e., Kraglievichia and Holmesina, are revised through parsimony phylogenetic analyses and new comparative morphological descriptions. For this work, unpublished material of pampatheriids (numerous osteoderms, one partial skull and a few postcranial bones) from Neogene formations of Colombia was analyzed. The results show that Scirrotherium is paraphyletic if we include all its referred species, i.e., Scirrotherium hondaensis, S. carinatum and S. antelucanus. The species S. carinatum is closer to Kraglievichia paranensis than to S. hondaensis or S. antelucanus, therefore the new name K. carinatum comb. nov. is proposed. The relationship among S. hondaensis and S. antelucanus could not be resolved, so these species should be designated in aphyly. In spite of failing to recover S. hondaensis and S. antelucanus as one single clade, here is preferred to maintain the generic name Scirrotherium in both species based on diagnostic evidence. New emended diagnoses for Scirrotherium, S. hondaensis and Kraglievichia are provided. The genus Holmesina was found to be monophyletic and positioned as the sister clade of Scirrotherium + Kraglievichia. The evolutionary and biogeographic implications of the new phylogeny and taxonomic re-arrangements are discussed. A possible geographic origin of the family Pampatheriidae and Scirrotherium in low latitudes of South America as early as Early Miocene times is claimed. The South American ancestor or sister taxon of Holmesina is predicted to be morphologically more similar to Scirrotherium than to Kraglievichia.

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Paleontología de una sección del río Corredores, formación Curré, Mioceno, Costa Rica

Cited by 4 publications

References 0 publications

Miocene Fossils of Old Providence Island (Western Caribbean, Colombia) and Geological Heritage of the Seaflower Biosphere Reserve

Miocene Fossils of Old Providence Island (Western Caribbean, Colombia) and Geological Heritage of the Seaflower Biosphere Reserve

Shallow gas seeps in the Golfo Dulce, South Pacific of Costa Rica: geological, physicochemical, and biological characterization

Systematic revision and redefinition of the genus Scirrotherium Edmund and Theodor, 1997 (Cingulata, Pampatheriidae): Implications for the origin of pampatheriids and the evolution of the South American lineage including Holmesina

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