The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina

A number of Early Cretaceous inoceramids are widely known worldwide, but many are poorly understood. In particular the nature of ligaments and muscle scars are in need of major revision. The inoceramid genus Neocomiceramus Pokhialainen and the species N. curacoensis (Weaver) are revised based on new...

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Detalles Bibliográficos
Autor principal: Lazo, D.G.
Formato: JOUR
Materias:
ammonite
Cretaceous
Hauterivian
shell
species occurrence
Argentina
Neuquen Basin
South America
Actinoceramus
Ammonoidea
Inoceramidae
Inoceramus
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00223360_v80_n6_p1113_Lazo
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00223360_v80_n6_p1113_Lazo
record_format dspace
spelling todo:paper_00223360_v80_n6_p1113_Lazo2023-10-03T14:31:40Z The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina Lazo, D.G. ammonite Cretaceous Hauterivian shell species occurrence Argentina Neuquen Basin South America Actinoceramus Ammonoidea Inoceramidae Inoceramus A number of Early Cretaceous inoceramids are widely known worldwide, but many are poorly understood. In particular the nature of ligaments and muscle scars are in need of major revision. The inoceramid genus Neocomiceramus Pokhialainen and the species N. curacoensis (Weaver) are revised based on newly collected materials in the Neuquén Basin, west-central Argentina. Neocomiceramus curacoensis is recorded in the Agua de la Mula Member of the Agrio Formation. A Late Hauterivian age is indicated by the associated ammonite fauna. Neocomiceramus curacoensis has a shell shape similar to Inoceramus J. Sowerby, but its ligament lies in a higher angle to the commissural plane and has a smaller number of pits. Neocomiceramus curacoensis probably lived reclined and byssally attached on muddy offshore substrates under restricted oxygen levels. The genus Neocomiceramus ranges from the Valanginian?, Hauterivian to Albian and probably is cosmopolitan. It differs from other well-recognized Early Cretaceous inoceramid genera, namely Actinoceramus Meek, Anopaea Eichwald, and Coloniceramus Pokhialainen by its shell shape, shell thickness, ornamentation, and ligament morphology. Copyright © 2006, The Paleontological Society. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00223360_v80_n6_p1113_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 ammonite
Cretaceous
Hauterivian
shell
species occurrence
Argentina
Neuquen Basin
South America
Actinoceramus
Ammonoidea
Inoceramidae
Inoceramus
spellingShingle ammonite
Cretaceous
Hauterivian
shell
species occurrence
Argentina
Neuquen Basin
South America
Actinoceramus
Ammonoidea
Inoceramidae
Inoceramus
Lazo, D.G.
The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
topic_facet ammonite
Cretaceous
Hauterivian
shell
species occurrence
Argentina
Neuquen Basin
South America
Actinoceramus
Ammonoidea
Inoceramidae
Inoceramus
description A number of Early Cretaceous inoceramids are widely known worldwide, but many are poorly understood. In particular the nature of ligaments and muscle scars are in need of major revision. The inoceramid genus Neocomiceramus Pokhialainen and the species N. curacoensis (Weaver) are revised based on newly collected materials in the Neuquén Basin, west-central Argentina. Neocomiceramus curacoensis is recorded in the Agua de la Mula Member of the Agrio Formation. A Late Hauterivian age is indicated by the associated ammonite fauna. Neocomiceramus curacoensis has a shell shape similar to Inoceramus J. Sowerby, but its ligament lies in a higher angle to the commissural plane and has a smaller number of pits. Neocomiceramus curacoensis probably lived reclined and byssally attached on muddy offshore substrates under restricted oxygen levels. The genus Neocomiceramus ranges from the Valanginian?, Hauterivian to Albian and probably is cosmopolitan. It differs from other well-recognized Early Cretaceous inoceramid genera, namely Actinoceramus Meek, Anopaea Eichwald, and Coloniceramus Pokhialainen by its shell shape, shell thickness, ornamentation, and ligament morphology. Copyright © 2006, The Paleontological Society.
format JOUR
author Lazo, D.G.
author_facet Lazo, D.G.
author_sort Lazo, D.G.
title The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
title_short The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
title_full The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
title_fullStr The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
title_full_unstemmed The occurrence of Neocomiceramus curacoensis (Weaver) in the Agrio Formation, Neuquén Basin, Argentina
title_sort occurrence of neocomiceramus curacoensis (weaver) in the agrio formation, neuquén basin, argentina
url http://hdl.handle.net/20.500.12110/paper_00223360_v80_n6_p1113_Lazo
work_keys_str_mv AT lazodg theoccurrenceofneocomiceramuscuracoensisweaverintheagrioformationneuquenbasinargentina
AT lazodg occurrenceofneocomiceramuscuracoensisweaverintheagrioformationneuquenbasinargentina
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