10.5061/DRYAD.3TK33C9J
Álvarez, Alicia
National University of La Plata
Perez, Sergio I
National Scientific and Technical Research Council
Verzi, Diego H
National University of La Plata
Data from: Early evolutionary differentiation of morphological variation
in the mandible of South American caviomorph rodents (Rodentia,
Caviomorpha)
Dryad
dataset
2011
mandibular morphology
Cavioidea
caviomorph rodents
Octodontoidea
Fossil record
phylogenetic comparative methods
evolutionary history
Miocene
Caviomorpha
Chinchilloidea
2011-09-06T18:47:09Z
2011-09-06T18:47:09Z
en
https://doi.org/10.1111/j.1420-9101.2011.02395.x
6355 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
Caviomorphs are a clade of South American rodents recorded at least since
the early Oligocene (>31.5 Ma) that exhibit ample eco-morphological
variation. It has been proposed that phylogenetic structure is more
important than ecological factors for understanding mandibular shape
variation in this clade. This was interpreted as a result of the
long-standing evolutionary history of caviomorphs and the early divergence
of major lineages. In this work we test this hypothesis through analysis
of morphological variation in the mandible of living and extinct species,
and compare this information with that obtained through comparative
phylogenetic analyses. Our results support the hypothesis of early origin
of mandibular variation; moreover, they suggest conservation of early
differentiated morphologies, which could indicate the existence of
constrained evolutionary diversification.
RWs extant taxa 7landmarksRelative Warp Analysis of aligned landmark
coordinates representing alveolar region of caviomorph mandible. Landmark
coordinates were adquired using tpsDig. Relative Warp Analysis was
conducted using tpsRelw.RWs extant and fossil taxa 7landmarksRelative Warp
Analysis of aligned landmark coordinates representing alveolar region of
caviomorph mandible. This file contains data for extant and fossil
caviomorph rodents. Landmark coordinates were adquired using tpsDig.
Relative Warp Analysis was conducted using tpsRelw.habits_dummy
variableDummy variables representing caviomorph rodents habits (i.e.
subterranean, fossorial and epigean). Data were obtained from specialized
literature.