INVESTIGADORES
GONZALEZ-JOSE rolando
artículos
Título:
Cladistic analysis of continuous modularized traits provides phylogenetic signal in Homo evolution
Autor/es:
ROLANDO GONZALEZ-JOSÉ; ESCAPA IGNACIO,; CÚNEO RUBEN,; WALTER NEVES,; HECTOR PUCCIARELLI,
Revista:
NATURE
Editorial:
NATURE PUBLISHING GROUP
Referencias:
Año: 2008 vol. 453 p. 775 - 778
ISSN:
0028-0836
Resumen:
Evolutionary novelties in the skeleton are usually expressed as
changes in the timing of growth of features intrinsically integrated
at different hierarchical levels of development1. As a consequence,
most of the shape-traits observed across species do vary quantitatively
rather than qualitatively2, in a multivariate space3 and in a
modularized way4,5. Because most phylogenetic analyses normally
use discrete, hypothetically independent characters6, previous
attempts have disregarded the phylogenetic signals potentially
enclosed in the shape of morphological structures. When analysing
low taxonomic levels, where most variation is quantitative in
nature, solving basic requirements like the choice of characters
and the capacity of using continuous, integrated traits is of crucial
importance in recovering wider phylogenetic information. This is
particularly relevant when analysing extinct lineages, where available
data are limited to fossilized structures. Here we show that
when continuous, multivariant and modularized characters are
treated as such, cladistic analysis successfully solves relationships
among main Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.1. As a consequence,
most of the shape-traits observed across species do vary quantitatively
rather than qualitatively2, in a multivariate space3 and in a
modularized way4,5. Because most phylogenetic analyses normally
use discrete, hypothetically independent characters6, previous
attempts have disregarded the phylogenetic signals potentially
enclosed in the shape of morphological structures. When analysing
low taxonomic levels, where most variation is quantitative in
nature, solving basic requirements like the choice of characters
and the capacity of using continuous, integrated traits is of crucial
importance in recovering wider phylogenetic information. This is
particularly relevant when analysing extinct lineages, where available
data are limited to fossilized structures. Here we show that
when continuous, multivariant and modularized characters are
treated as such, cladistic analysis successfully solves relationships
among main Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.2, in a multivariate space3 and in a
modularized way4,5. Because most phylogenetic analyses normally
use discrete, hypothetically independent characters6, previous
attempts have disregarded the phylogenetic signals potentially
enclosed in the shape of morphological structures. When analysing
low taxonomic levels, where most variation is quantitative in
nature, solving basic requirements like the choice of characters
and the capacity of using continuous, integrated traits is of crucial
importance in recovering wider phylogenetic information. This is
particularly relevant when analysing extinct lineages, where available
data are limited to fossilized structures. Here we show that
when continuous, multivariant and modularized characters are
treated as such, cladistic analysis successfully solves relationships
among main Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.4,5. Because most phylogenetic analyses normally
use discrete, hypothetically independent characters6, previous
attempts have disregarded the phylogenetic signals potentially
enclosed in the shape of morphological structures. When analysing
low taxonomic levels, where most variation is quantitative in
nature, solving basic requirements like the choice of characters
and the capacity of using continuous, integrated traits is of crucial
importance in recovering wider phylogenetic information. This is
particularly relevant when analysing extinct lineages, where available
data are limited to fossilized structures. Here we show that
when continuous, multivariant and modularized characters are
treated as such, cladistic analysis successfully solves relationships
among main Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.6, previous
attempts have disregarded the phylogenetic signals potentially
enclosed in the shape of morphological structures. When analysing
low taxonomic levels, where most variation is quantitative in
nature, solving basic requirements like the choice of characters
and the capacity of using continuous, integrated traits is of crucial
importance in recovering wider phylogenetic information. This is
particularly relevant when analysing extinct lineages, where available
data are limited to fossilized structures. Here we show that
when continuous, multivariant and modularized characters are
treated as such, cladistic analysis successfully solves relationships
among main Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.Homo taxa. Our attempt is based on a combination of
cladistics, evolutionary-development-derived selection of characters,
and geometric morphometrics methods. In contrast with
previous cladistic analyses of hominid phylogeny, our method
accounts for the quantitative nature of the traits, and respects their
morphological integration patterns. Because complex phenotypes
are observable across different taxonomic groups and are potentially
informative about phylogenetic relationships, future analyses
should point strongly to the incorporation of these types of
trait.