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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ftunivlaplata:oai:sedici.unlp.edu.ar:10915/85498 2023-05-15T13:47:46+02:00 Distinguishing between two Antarctic species of Eocene Palaeeudyptes penguins: A statistical approach using tarsometatarsi Jadwiszczak, Piotr Acosta Hospitaleche, Carolina Ileana Alicia 2013 application/pdf 237-252 http://sedici.unlp.edu.ar/handle/10915/85498 en eng Polish Polar Research vol. 34, no. 3 http://sedici.unlp.edu.ar/handle/10915/85498 issn:0138-0338 http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) CC-BY-NC-SA Paleontología Antarctic La meseta formation Paleogene Sphenisciformes Statistics Systematics Articulo 2013 ftunivlaplata 2020-10-18T00:01:56Z 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. Facultad de Ciencias Naturales y Museo Article in Journal/Newspaper Antarc* Antarctic Polar Research Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) Antarctic The Antarctic |
institution |
Open Polar |
collection |
Universidad Nacional de La Plata (UNLP): SeDiCI (Servicio de Difusión de la Creación Intelectual) |
op_collection_id |
ftunivlaplata |
language |
English |
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. Facultad de Ciencias Naturales y Museo |
format |
Article in Journal/Newspaper |
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 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Polar Research |
genre_facet |
Antarc* Antarctic Polar Research |
op_relation |
Polish Polar Research vol. 34, no. 3 http://sedici.unlp.edu.ar/handle/10915/85498 issn:0138-0338 |
op_rights |
http://creativecommons.org/licenses/by-nc-sa/4.0/ Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) |
op_rightsnorm |
CC-BY-NC-SA |
_version_ |
1766247830112960512 |