Cosmopolitan Early Jurassic Marine Gastropods from West-Central Patagonia, Argentina

Ferrari, S. Mariel

doi:10.4202/app.2008.0070

Cited by 18 publications

(53 citation statements)

References 9 publications

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“…In the Pampa de Agnia area, the most extensive outcrops of the Osta Arena Formation, a partial equivalent of the Mulanguiñeu Formation, are on the western slope of sierras de Lonco Trapial, Cajón de Ginebra and Cerro Negro. This formation has an early Toarcian age based on hildoceratid ammonoids (Musacchio and Riccardi, 1971;Blasco et al, 1980;Ferrari, 2009). The invertebrate association here described comes from La Casilda, a new fossil locality situated in the Río Genoa valley (Fig.…”

Section: Geological Settingmentioning

confidence: 86%

“…The stratigraphy of these deposits has been established by several studies. An updated and detailed historical chronology of the Jurassic stratigraphic sequence of this region in Patagonia was recently provided by Ferrari (2009Ferrari ( , 2011aFerrari ( , b, 2013Ferrari ( , 2014a and Pagani et al (2011).…”

Section: Geological Settingmentioning

confidence: 99%

“…In addition, the late Triassic marine communities at the Pucará Group in central Perú yield representatives of the family Procerithiidae (Haas, 1953). The genera Cyptaulax and Procerithium are common along the Andean region of South America, from the Late Triassic of Perú (Haas, 1953), to the Early Jurassic of Chile (Gründel, 2001) and Argentina (Ferrari, 2009(Ferrari, , 2012. The genus Lithotrochus is endemic of the Andean region of South America for a short time range in the Early Jurassic, from the early Sinemurian to the late Pliensbachian (Damborenea and Ferrari, 2008).…”

Section: Paleobiogeographical Considerationsmentioning

confidence: 99%

“…Bivalves, gastropods, cephalopods, brachiopods and corals were reported by these authors from several localities in the area, including Lomas Occidentales, Cerro La Trampa, Piedra Shotle and Lomas de Betancourt, which have yielded the most important Jurassic fossiliferous beds from the marine Mulanguiñeu Formation (Chubut Province). Another important marine locality was reported at the Early Jurassic of the Osta Arena Formation from the Pampa de Agnia region (central Chubut Province), known as Puesto Currumil (Ferrari, 2009(Ferrari, , 2012(Ferrari, , 2013Pagani et al, 2012). Preliminary biostratigraphic analyses carried out in the southern and west-central Chubut Province (Pagani et al, 2012;Ferrari, 2013Ferrari, , 2014a indicated a late Pliensbachian-early Toarcian age for these deposits.…”

Section: Introductionmentioning

confidence: 99%

“…Preliminary biostratigraphic analyses carried out in the southern and west-central Chubut Province (Pagani et al, 2012;Ferrari, 2013Ferrari, , 2014a indicated a late Pliensbachian-early Toarcian age for these deposits. Moreover, Damborenea and Ferrari (2008), Ferrari (2009Ferrari ( , 2011aFerrari ( , b, 2012Ferrari ( , 2013Ferrari ( , 2014a, Ferrari et al (2014) and Pagani et al (2011Pagani et al ( , 2012 recently carried out new studies on the taxonomic composition of the faunas in the Early Jurassic of south-western and central Chubut Province, including the investigation of new fossil localities and the collection of Early Jurassic material.…”

Section: Introductionmentioning

confidence: 99%

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Una nueva localidad marina de edad jurásica temprana en la cuenca sudoccidental del Chubut, Argentina.

Ferrari

Bessone

2015

Andgeo

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ABSTRACT.A shallow marine invertebrate association is reported from a new Early Jurassic locality namely La Casilda, which is situated in the southwestern region of the Chubut Basin (Patagonia, Argentina). The marine deposits of La Casilda are located in the Río Genoa valley and bear a diverse invertebrate fauna including bivalves, gastropods, brachiopods, echinoderms and corals. A preliminary taxonomic analysis of the invertebrate fauna suggests that La Casilda deposits belong to the Mulanguiñeu Formation of late Pliensbachian-early Toarcian age, and may be coeval with those from the marine localities previously sampled in other regions of the Río Genoa valley. The preliminary results of a biodiversity analysis displayed that La Casilda is one of the most diverse localities at the Chubut Basin and could be assigned to the biofacies at the mixed siliciclastic-carbonate ramp proposed for the marine Early Jurassic at the Andean Basin of northern Chile. The evolution of the marine transgression during the early Pliensbachian-early Toarcian is also interpreted here in a time scale based on ammonite faunas, giving a preliminary temporal reconstruction of the entire Chubut Basin. Keywords: Invertebrates, La Casilda, Mulanguiñeu Formation, Chubut Basin, Argentina. RESUMEN. Una nueva localidad marina de edad jurásica temprana en la cuenca sudoccidental del Chubut, Argentina. Una asociación de invertebrados marinos de aguas someras se registró en una nueva localidad perteneciente al Jurásico temprano denominada La Casilda, la que se sitúa en la región suroeste de la cuenca del Chubut (Patagonia, Argentina). Los depósitos marinos correspondientes a La Casilda se encuentran en el valle del Río Genoa y comprenden una diversa fauna de invertebrados, incluyendo bivalvos, gastrópodos, braquiópodos, equinodermos y corales. Un análisis taxonómico preliminar de dicha fauna sugiere que los depósitos de La Casilda pertenecen a la Formación Mulanguiñeu, cuya edad es Pliensbachiano tardío-Toarciano temprano, y a su vez podrían ser coetáneos con los depósitos marinos de otras localidades muestreados previamente en el valle del Río Genoa. Resultados preliminares de un análisis de biodiversidad muestran que La Casilda es una de las localidades más diversas en la cuenca del Chubut y podría ajustarse a las biofacies correspondientes a la rampa mixta siliciclástica-carbonatada propuesta para la Cuenca Andina del Jurásico temprano marino del norte de Chile. La evolución de la transgresión marina que tuvo lugar durante el Pliensbachiano temprano-Toarciano temprano también se interpreta aquí en una escala de tiempo sobre la base de la fauna de ammonites, dando una reconstrucción temporal preliminar de toda la cuenca del Chubut.Palabras clave : Invertebrados, La Casilda, Formación Mulanguiñeu, Cuenca del Chubut, Argentina. 350 A new eArly JurAssic mArine locAlity from southwestern chubut bAsin, ArgentinA.

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Section: Geological Settingmentioning

confidence: 86%

Section: Geological Settingmentioning

confidence: 99%

Section: Paleobiogeographical Considerationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Una nueva localidad marina de edad jurásica temprana en la cuenca sudoccidental del Chubut, Argentina.

Ferrari

Bessone

2015

Andgeo

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Upper Toarcian (Lower Jurassic) marine gastropods from the Cleveland Basin, England: systematics, palaeobiogeography and contribution to biotic recovery from the early Toarcian extinction event

Ferrari

Little

Atkinson

2020

Papers in Palaeontology

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Here we describe a new upper Toarcian (Lower Jurassic) marine gastropod fauna from rocks of the Cleveland Basin exposed on the North Yorkshire coast of England. The fossil assemblage consists of 16 species, of which three are new: Katosira? bicarinata sp. nov., Turritelloidea stepheni sp. nov. and Striactaenonina elegans sp. nov. Four species are described in open nomenclature as Tricarilda? sp., Jurilda sp., Cylindrobullina sp. and Cossmannina sp. The other species have previously been described: Coelodiscus minutus (Sch€ ubler in Zieten), Procerithium quadrilineatum (R€ omer), Pseudokatosira undulata (Benz in von Zieten), Palaeorissoina aff. acuminata (Gr€ undel), Pietteia unicarinata (Hudleston), Globularia cf. canina (Hudleston), Striactaeonina cf. richterorum Schulbert & N€ utzel, Striactaenonina aff. tenuistriata (Hudleston) and Sulcoactaeon sedgvici (Phillips). Most of these species are the earliest records of their respective genera and show palaeobiogeographical connections with

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New early Jurassic decapod crustacean from Patagonia (Chubut province), Argentina

et al. 2010

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A well-preserved decapod specimen was found in early Toarcian deposits cropping out on the western slope of Meseta Catreleo, central Chubut province, Argentina. It is a nearly complete exoskeleton preserved in lateral view, slightly crushed, in fine-grained sandstones. The skeleton is mostly articulated, though some pieces are disarticulated or missing. Taphonomic features indicate a relatively rapid burial after death, with little or no transport. This specimen is here described as a new species of the genus Mecochirus Germar (Decapoda: Glypheoidea). Mecochirus robbianoi n. sp. is characterized by a very long, achelate, first pair of pereiopods with a narrow, long, straight dactylus, a thin carapace ornamented by low tubercules, with a slightly oblique cervical groove and a short acute rostrum. The family Mecochiridae arose in the Triassic, but the group diversified during the Early Jurassic. Mecochirus had a wide geographical distribution and is known for sure from Lower Jurassic to Upper Cretaceous deposits. The new record from Chubut is one of the oldest for the genus, the oldest for South America, and the first for Argentina, thus considerably extending the known distribution of the genus during the Early Jurassic.Kurzfassung Ein gut erhaltener Decapode wurde in Ablagerungen des unteren Toarciums auf der Westseite der Meseta Catreleo im Zentrum der Provinz Chubut (Argentinien) gefunden. Es handelt sich um ein fast komplett erhaltenes Exoskelett, welches in einem feinkörnigem Sandstein leicht verdrück in Seitenlage eingebettet ist. Die taphonomische Analyse deutet auf eine rasche Einbettung nach dem Tod, mit nur geringem oder fehlendem Transport. Das hier beschriebene Exemplar wird als neue Art der Gattung Mecochirus Germar (Decapoda: Glypheoidea), M. robbianoi n. sp., beschrieben. Sie zeichnet sich durch ein sehr langes, achelates Paar der ersten Pereiopoden mit schmalen, langem, geradem Daktylus, einem mit flachen Tuberkeln verzierten Carpax mit leicht gerundeter Cervicalfurche und ein kurzes, spitzes Rostrum aus. Die Familie Mecochiridae erschien in der Trias; im Unterjura kam es zu einer Diversifikation. Mecochirus hatte eine weite paläo-geographische Verbreitung und ist vom Unterjura bis in die Oberkreide mit Sicherheit bekannt. Die neue Art ist eine der ältesten der Gattung, die älteste aus Südamerika und zugleich der erstnachweis aus Argentinien. Dies weist auf eine viel größere Verbreitung im Unterjura hin als bisher angenommen.Schlü sselwörter Decapoda Á Glypheoidea Á Mecochirus Á Unter Jura Á Patagonia Á Chubut Á Argentina

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Cosmopolitan Early Jurassic Marine Gastropods from West-Central Patagonia, Argentina

Cited by 18 publications

References 9 publications

Una nueva localidad marina de edad jurásica temprana en la cuenca sudoccidental del Chubut, Argentina.

Una nueva localidad marina de edad jurásica temprana en la cuenca sudoccidental del Chubut, Argentina.

Upper Toarcian (Lower Jurassic) marine gastropods from the Cleveland Basin, England: systematics, palaeobiogeography and contribution to biotic recovery from the early Toarcian extinction event

New early Jurassic decapod crustacean from Patagonia (Chubut province), Argentina

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