Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents

Systematics of fossil octodontoids (Rodentia, Caviomorpha) is in great part based on insights into the knowledge of teeth, making the step of dental characterization certainly relevant for the evolutionary reconstruction of these rodents. Different homology hypotheses were proposed for the same toot...

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Detalles Bibliográficos
Autor principal: Candela, Adriana Magdalena
Formato: Articulo
Lenguaje:Inglés
Publicado: 2016
Materias:
Ciencias Naturales
Echimyidae
Homology
Mammalia
Octodontidae
Parsimony analysis
Rodentia
Tooth morphology
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/96325
https://ri.conicet.gov.ar/11336/54488
http://www.bioone.org/doi/abs/10.4202/app.00113.2014
http://www.app.pan.pl/article/item/app001132014.html
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-96325
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Naturales
Echimyidae
Homology
Mammalia
Octodontidae
Parsimony analysis
Rodentia
Tooth morphology
spellingShingle Ciencias Naturales
Echimyidae
Homology
Mammalia
Octodontidae
Parsimony analysis
Rodentia
Tooth morphology
Candela, Adriana Magdalena
Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
topic_facet Ciencias Naturales
Echimyidae
Homology
Mammalia
Octodontidae
Parsimony analysis
Rodentia
Tooth morphology
description Systematics of fossil octodontoids (Rodentia, Caviomorpha) is in great part based on insights into the knowledge of teeth, making the step of dental characterization certainly relevant for the evolutionary reconstruction of these rodents. Different homology hypotheses were proposed for the same tooth structures, a fact that indicates the importance of knowing on which criteria the dental characters supporting the classifications were based. In this line, I evaluate the step of characterization of certain conflictive molar characters previously used, and their impact on phylogeny of octodontoids. I explore which the criteria followed to propose the hypotheses of correspondences for these characters are in light of the anatomical evidence. Based on the outcome of phylogenetic trees obtained previously, I analyze if the evolutionary transformations are compatible with character states observed in the terminals. New cladistic analyses based on recoded molar characters indicate that, unlike results recently obtained, the unorthodox position of Sallamys, Protadelphomys, and Willidewu as basal ctenomyines is not recovered. The position of Caviocricetus, Acarechimys-Neophanomysas as Octodontinae is not maintained. These results indicate that reanalyses of conflictive dental characters, scrutinizing data matrices, are particularly necessary to evaluate the current controversy on the phylogeny of octodontoids. Lower molar character definition and character states delimitation in octodontoids, being relevant to phylogenetic reconstruction, should be founded on anatomical examination, following explicit criteria of homology. Alternative hypotheses of "primary homology" proposed for the same molar traits in octodontoids indicate that each main group of caviomorphs requires its own anatomical study.
format Articulo
Articulo
author Candela, Adriana Magdalena
author_facet Candela, Adriana Magdalena
author_sort Candela, Adriana Magdalena
title Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
title_short Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
title_full Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
title_fullStr Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
title_full_unstemmed Analyzing the Impact of Conflictive Dental Characters on the Phylogeny of Octodontoid Rodents
title_sort analyzing the impact of conflictive dental characters on the phylogeny of octodontoid rodents
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/96325
https://ri.conicet.gov.ar/11336/54488
http://www.bioone.org/doi/abs/10.4202/app.00113.2014
http://www.app.pan.pl/article/item/app001132014.html
work_keys_str_mv AT candelaadrianamagdalena analyzingtheimpactofconflictivedentalcharactersonthephylogenyofoctodontoidrodents
bdutipo_str Repositorios
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