Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)

The use of different methodological approaches together with an exhaustive qualitative study has helped to recognize important morphological traits to distinguish species in a systematic and phylogenetic framework. Parabolinella triarthroides Harrington, 1938 was described based on two cranidia from...

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Detalles Bibliográficos
Autores principales: Monti, D.S., Confalonieri, V.A.
Formato: JOUR
Materias:
comparative study
fossil
homology
morphology
morphometry
phylogenetics
phylogeny
taxonomy
trilobite
type specimen
Argentina
Jujuy
Olenidae
Trilobita
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00223360_v91_n5_p919_Monti
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_00223360_v91_n5_p919_Monti
record_format dspace
spelling todo:paper_00223360_v91_n5_p919_Monti2023-10-03T14:31:44Z Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae) Monti, D.S. Confalonieri, V.A. comparative study fossil homology morphology morphometry phylogenetics phylogeny taxonomy trilobite type specimen Argentina Jujuy Olenidae Trilobita The use of different methodological approaches together with an exhaustive qualitative study has helped to recognize important morphological traits to distinguish species in a systematic and phylogenetic framework. Parabolinella triarthroides Harrington, 1938 was described based on two cranidia from the Quebrada de Coquena, Purmamarca, Jujuy province. The generic assignment of P. triarthroides has been questioned by a phylogenetic analysis, which resolves this species as the sister group of Bienvillia Clark, 1924. To explore the generic assignment of this species, a revision of the type material, plus a morphometric analysis including specimens of Parabolinella Brøgger, 1882 and Bienvillia were performed. In addition, the original matrix used in the published phylogeny was reviewed and enlarged, including more species of Bienvillia. Continuous characters were coded in different ways in order to compare how they could affect the ordering of specimens and their phylogenetic relationships. Finally, both methodologies were compared, especially in regard to the behavior of the quantitative characters included in the analyses. From the combined analyses, it is shown that similarities between the cranidium of P. triarthroides and all other Parabolinella species are true homologies instead of a by-product of evolutionary convergence. Therefore, P. triarthroides should be considered a member of this genus. Finally, this study demonstrates that the best strategy for solving systematic problems in groups where the morphological variation is the only source of information (i.e., fossil taxa without living representatives) is the implementation of an integrative approach, combining different methodological techniques and a good description of specimens. © 2017, 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_v91_n5_p919_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 comparative study
fossil
homology
morphology
morphometry
phylogenetics
phylogeny
taxonomy
trilobite
type specimen
Argentina
Jujuy
Olenidae
Trilobita
spellingShingle comparative study
fossil
homology
morphology
morphometry
phylogenetics
phylogeny
taxonomy
trilobite
type specimen
Argentina
Jujuy
Olenidae
Trilobita
Monti, D.S.
Confalonieri, V.A.
Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
topic_facet comparative study
fossil
homology
morphology
morphometry
phylogenetics
phylogeny
taxonomy
trilobite
type specimen
Argentina
Jujuy
Olenidae
Trilobita
description The use of different methodological approaches together with an exhaustive qualitative study has helped to recognize important morphological traits to distinguish species in a systematic and phylogenetic framework. Parabolinella triarthroides Harrington, 1938 was described based on two cranidia from the Quebrada de Coquena, Purmamarca, Jujuy province. The generic assignment of P. triarthroides has been questioned by a phylogenetic analysis, which resolves this species as the sister group of Bienvillia Clark, 1924. To explore the generic assignment of this species, a revision of the type material, plus a morphometric analysis including specimens of Parabolinella Brøgger, 1882 and Bienvillia were performed. In addition, the original matrix used in the published phylogeny was reviewed and enlarged, including more species of Bienvillia. Continuous characters were coded in different ways in order to compare how they could affect the ordering of specimens and their phylogenetic relationships. Finally, both methodologies were compared, especially in regard to the behavior of the quantitative characters included in the analyses. From the combined analyses, it is shown that similarities between the cranidium of P. triarthroides and all other Parabolinella species are true homologies instead of a by-product of evolutionary convergence. Therefore, P. triarthroides should be considered a member of this genus. Finally, this study demonstrates that the best strategy for solving systematic problems in groups where the morphological variation is the only source of information (i.e., fossil taxa without living representatives) is the implementation of an integrative approach, combining different methodological techniques and a good description of specimens. © 2017, The Paleontological Society.
format JOUR
author Monti, D.S.
Confalonieri, V.A.
author_facet Monti, D.S.
Confalonieri, V.A.
author_sort Monti, D.S.
title Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
title_short Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
title_full Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
title_fullStr Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
title_full_unstemmed Comparing phylogenetics and linear morphometrics to solve the generic assignment of Parabolinella ? triarthroides Harrington (Trilobita, Olenidae)
title_sort comparing phylogenetics and linear morphometrics to solve the generic assignment of parabolinella ? triarthroides harrington (trilobita, olenidae)
url http://hdl.handle.net/20.500.12110/paper_00223360_v91_n5_p919_Monti
work_keys_str_mv AT montids comparingphylogeneticsandlinearmorphometricstosolvethegenericassignmentofparabolinellatriarthroidesharringtontrilobitaolenidae
AT confalonieriva comparingphylogeneticsandlinearmorphometricstosolvethegenericassignmentofparabolinellatriarthroidesharringtontrilobitaolenidae
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