Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications

The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and Leanza, 1957 was reported from a great number of Tremadocian localities and includ...

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Autores principales: Monti, D.S., Benítez, M.D.H., Ramirez, M.A.
Formato: JOUR
Materias:
biostratigraphy
body shape
fossil assemblage
fossil record
identification method
morphometry
Tremadocian
trilobite
type locality
Argentina
Buenos Aires [Argentina]
Cordillera Oriental [Argentina]
Olenidae
Trilobita
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00223360_v90_n4_p672_Monti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00223360_v90_n4_p672_Monti
record_format dspace
spelling todo:paper_00223360_v90_n4_p672_Monti2023-10-03T14:31:43Z Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications Monti, D.S. Benítez, M.D.H. Ramirez, M.A. biostratigraphy body shape fossil assemblage fossil record identification method morphometry Tremadocian trilobite type locality Argentina Buenos Aires [Argentina] Cordillera Oriental [Argentina] Olenidae Trilobita The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and Leanza, 1957 was reported from a great number of Tremadocian localities and includes a wide range of morphologies. Based on specimens collected from the type locality (Purmamarca, Jujuy) and the quebrada Moya (Huacalera, Jujuy), as well as on material of the Harrington and Leanza collections in the University of Buenos Aires, classic morphometry and geometric morphometry methods were used to evaluate the variability in the cranidium of P. Argentinensis. The results obtained from the two methodologies are similar. Both analyses allowed the review of the diagnosis of P. Argentinensis, and the distinction of two new morphologies: Parabolinella clarisae n. Sp. And Parabolinella pompadouris n. Sp. The results show how morphogeometrics distinguishes more clearly the three morphotypes and provides graphical representations of the differences between those groups and how from the representations plus the correlation between classical variables and principal components, new diagnostic characters that distinguish the three morphospecies, can be identified. © 2016, The Paleontological Society. Fil:Monti, D.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ramirez, M.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00223360_v90_n4_p672_Monti
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic biostratigraphy
body shape
fossil assemblage
fossil record
identification method
morphometry
Tremadocian
trilobite
type locality
Argentina
Buenos Aires [Argentina]
Cordillera Oriental [Argentina]
Olenidae
Trilobita
spellingShingle biostratigraphy
body shape
fossil assemblage
fossil record
identification method
morphometry
Tremadocian
trilobite
type locality
Argentina
Buenos Aires [Argentina]
Cordillera Oriental [Argentina]
Olenidae
Trilobita
Monti, D.S.
Benítez, M.D.H.
Ramirez, M.A.
Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
topic_facet biostratigraphy
body shape
fossil assemblage
fossil record
identification method
morphometry
Tremadocian
trilobite
type locality
Argentina
Buenos Aires [Argentina]
Cordillera Oriental [Argentina]
Olenidae
Trilobita
description The late Cambrian-Early Ordovician sequences of the Cordillera Oriental in northwestern Argentina are extensive and highly fossiliferous. The olenid trilobite Parabolinella argentinensis Kobayashi sensu Harrington and Leanza, 1957 was reported from a great number of Tremadocian localities and includes a wide range of morphologies. Based on specimens collected from the type locality (Purmamarca, Jujuy) and the quebrada Moya (Huacalera, Jujuy), as well as on material of the Harrington and Leanza collections in the University of Buenos Aires, classic morphometry and geometric morphometry methods were used to evaluate the variability in the cranidium of P. Argentinensis. The results obtained from the two methodologies are similar. Both analyses allowed the review of the diagnosis of P. Argentinensis, and the distinction of two new morphologies: Parabolinella clarisae n. Sp. And Parabolinella pompadouris n. Sp. The results show how morphogeometrics distinguishes more clearly the three morphotypes and provides graphical representations of the differences between those groups and how from the representations plus the correlation between classical variables and principal components, new diagnostic characters that distinguish the three morphospecies, can be identified. © 2016, The Paleontological Society.
format JOUR
author Monti, D.S.
Benítez, M.D.H.
Ramirez, M.A.
author_facet Monti, D.S.
Benítez, M.D.H.
Ramirez, M.A.
author_sort Monti, D.S.
title Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
title_short Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
title_full Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
title_fullStr Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
title_full_unstemmed Variation on cranidial shape of Parabolinella argentinensis Kobayashi (Trilobita, Olenidae) from the Tremadocian of northwestern Argentina: Taxonomic implications
title_sort variation on cranidial shape of parabolinella argentinensis kobayashi (trilobita, olenidae) from the tremadocian of northwestern argentina: taxonomic implications
url http://hdl.handle.net/20.500.12110/paper_00223360_v90_n4_p672_Monti
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