Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi

Defining species boundaries, due to morphological variation, often represents a significant challenge in paleozoology. In this paper we report results from multi- and univariate data analyses, such as enhanced clustering techniques, principal coordinates ordination method, kernel density estimations...

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Detalles Bibliográficos
Autores principales: Jadwiszczak, Piotr, Acosta Hospitaleche, Carolina Ileana Alicia
Formato: Articulo
Lenguaje:Inglés
Publicado: 2013
Materias:
Paleontología
Antarctic
La meseta formation
Paleogene
Sphenisciformes
Statistics
Systematics
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/85498
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-85498
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Paleontología
Antarctic
La meseta formation
Paleogene
Sphenisciformes
Statistics
Systematics
spellingShingle Paleontología
Antarctic
La meseta formation
Paleogene
Sphenisciformes
Statistics
Systematics
Jadwiszczak, Piotr
Acosta Hospitaleche, Carolina Ileana Alicia
Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
topic_facet Paleontología
Antarctic
La meseta formation
Paleogene
Sphenisciformes
Statistics
Systematics
description Defining species boundaries, due to morphological variation, often represents a significant challenge in paleozoology. In this paper we report results from multi- and univariate data analyses, such as enhanced clustering techniques, principal coordinates ordination method, kernel density estimations and finite mixture model analyses, revealing some morphometric patterns within the Eocene Antarctic representatives of Palaeeudyptes penguins. These large-sized birds were represented by two species, P. gunnari and P. klekowskii, known mainly from numerous isolated bones. Investigations focused on tarsometatarsi, crucial bones in paleontology of early penguins, resulted in a probability-based framework allowing for the "fuzzy" partitioning the studied specimens into two taxa with partly overlapping size distributions. Such a number of species was supported by outcomes from both multi- and univariate studies. In our opinion, more reliance should be placed on the quantitative analysis of form when distinguishing between species within the Antarctic Palaeeudyptes.
format Articulo
Articulo
author Jadwiszczak, Piotr
Acosta Hospitaleche, Carolina Ileana Alicia
author_facet Jadwiszczak, Piotr
Acosta Hospitaleche, Carolina Ileana Alicia
author_sort Jadwiszczak, Piotr
title Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
title_short Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
title_full Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
title_fullStr Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
title_full_unstemmed Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi
title_sort distinguishing between two antarctic species of eocene palaeeudyptes penguins: a statistical approach using tarsometatarsi
publishDate 2013
url http://sedici.unlp.edu.ar/handle/10915/85498
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