Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies

The present contribution describes the history of the study of fossil invertebrates of the La Tosca Member (Huitrín Formation), based on literature review and new paleontological data from recent field work in the sierra de la Cara Cura and Ranquil del Norte in Mendoza. Groeber first visited this re...

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Autores principales:	Lazo, Dario Gustavo, Cataldo, Cecilia Soledad, Luci, Leticia, Aguirre, María Belén
Publicado:	2017
Materias:	Bivalvia Gastropoda Huitrín La tosca Serpulidae bivalve Cretaceous environmental stress fossil record gastropod paleoenvironment paleontology taxonomy Argentina Mendoza Neuquen Basin algae Bryozoa Characeae Conchostraca Cura Invertebrata Trigoniidae Unionoida
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n1_p19_Lazo http://hdl.handle.net/20.500.12110/paper_00044822_v74_n1_p19_Lazo
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00044822_v74_n1_p19_Lazo
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spelling	paper:paper_00044822_v74_n1_p19_Lazo2023-06-08T14:26:53Z Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies Lazo, Dario Gustavo Cataldo, Cecilia Soledad Luci, Leticia Aguirre, María Belén Bivalvia Gastropoda Huitrín La tosca Serpulidae bivalve Cretaceous environmental stress fossil record gastropod paleoenvironment paleontology taxonomy Argentina Mendoza Neuquen Basin algae Bivalvia Bryozoa Characeae Conchostraca Cura Gastropoda Invertebrata Serpulidae Trigoniidae Unionoida The present contribution describes the history of the study of fossil invertebrates of the La Tosca Member (Huitrín Formation), based on literature review and new paleontological data from recent field work in the sierra de la Cara Cura and Ranquil del Norte in Mendoza. Groeber first visited this region between 1914 and 1917 and collected the first fossil gastropods. These materials were bequeathed to R. Wichmann and M. Doello Jurado for study and because of an initial provenance mistake the dispute about marine or continental affinities started. The paleontological controversies continued including mistaken identifications of bivalves, gastropods and serpulids, which were assigned to freshwater taxa such as conchostraca, characeae algae, and unionoid bivalves. These taxonomic misunderstandings led to repetitive wrong paleoenvironmental interpretations. Charles Weaver also marked an important milestone as he was the first to describe bivalves from the La Tosca Member, but not having taken into account previous publications by Groeber he assigned them wrongly to the top of the Agrio Formation. The new paleontological data provided here include the first record of trigoniid bivalves and cyclostome bryozoans that altogether reinforce the marine affinities of the fauna. Two taxa of gastropods and pavements of serpulid tubes are also described. Low diversity, low evenness, small size and relatively thin shells in comparison with faunas of the underlying Agrio Formation characterize the benthic faunal association of the La Tosca Member. The association and its facies relationships indicate a marginal marine environment subject to environmental stress by changes in salinity. © 2017, Asociacion Geologica Argentina. All rights reserved. Fil:Lazo, D.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cataldo, C.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Luci, L. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Aguirre-Urreta, B. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n1_p19_Lazo http://hdl.handle.net/20.500.12110/paper_00044822_v74_n1_p19_Lazo
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Bivalvia Gastropoda Huitrín La tosca Serpulidae bivalve Cretaceous environmental stress fossil record gastropod paleoenvironment paleontology taxonomy Argentina Mendoza Neuquen Basin algae Bivalvia Bryozoa Characeae Conchostraca Cura Gastropoda Invertebrata Serpulidae Trigoniidae Unionoida
spellingShingle	Bivalvia Gastropoda Huitrín La tosca Serpulidae bivalve Cretaceous environmental stress fossil record gastropod paleoenvironment paleontology taxonomy Argentina Mendoza Neuquen Basin algae Bivalvia Bryozoa Characeae Conchostraca Cura Gastropoda Invertebrata Serpulidae Trigoniidae Unionoida Lazo, Dario Gustavo Cataldo, Cecilia Soledad Luci, Leticia Aguirre, María Belén Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
topic_facet	Bivalvia Gastropoda Huitrín La tosca Serpulidae bivalve Cretaceous environmental stress fossil record gastropod paleoenvironment paleontology taxonomy Argentina Mendoza Neuquen Basin algae Bivalvia Bryozoa Characeae Conchostraca Cura Gastropoda Invertebrata Serpulidae Trigoniidae Unionoida
description	The present contribution describes the history of the study of fossil invertebrates of the La Tosca Member (Huitrín Formation), based on literature review and new paleontological data from recent field work in the sierra de la Cara Cura and Ranquil del Norte in Mendoza. Groeber first visited this region between 1914 and 1917 and collected the first fossil gastropods. These materials were bequeathed to R. Wichmann and M. Doello Jurado for study and because of an initial provenance mistake the dispute about marine or continental affinities started. The paleontological controversies continued including mistaken identifications of bivalves, gastropods and serpulids, which were assigned to freshwater taxa such as conchostraca, characeae algae, and unionoid bivalves. These taxonomic misunderstandings led to repetitive wrong paleoenvironmental interpretations. Charles Weaver also marked an important milestone as he was the first to describe bivalves from the La Tosca Member, but not having taken into account previous publications by Groeber he assigned them wrongly to the top of the Agrio Formation. The new paleontological data provided here include the first record of trigoniid bivalves and cyclostome bryozoans that altogether reinforce the marine affinities of the fauna. Two taxa of gastropods and pavements of serpulid tubes are also described. Low diversity, low evenness, small size and relatively thin shells in comparison with faunas of the underlying Agrio Formation characterize the benthic faunal association of the La Tosca Member. The association and its facies relationships indicate a marginal marine environment subject to environmental stress by changes in salinity. © 2017, Asociacion Geologica Argentina. All rights reserved.
author	Lazo, Dario Gustavo Cataldo, Cecilia Soledad Luci, Leticia Aguirre, María Belén
author_facet	Lazo, Dario Gustavo Cataldo, Cecilia Soledad Luci, Leticia Aguirre, María Belén
author_sort	Lazo, Dario Gustavo
title	Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
title_short	Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
title_full	Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
title_fullStr	Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
title_full_unstemmed	Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies
title_sort	groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: a story of paleontological controversies
publishDate	2017
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v74_n1_p19_Lazo http://hdl.handle.net/20.500.12110/paper_00044822_v74_n1_p19_Lazo
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Groeber and the fossil invertebrates of la tosca member, lower cretaceous of the neuquén basin: A story of paleontological controversies

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