POSTWEANING ONTOGENY OF THE SKULL OF DIDELPHIS ALBIVENTRIS

By F. Abdala, David A. Flores, N. Giannini. 2001

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Phylogenetic Relationships and Classification of Didelphid Marsupials, an Extant Radiation of New World Metatherian Mammals (2009, background): “Juvenile (and some subadult) specimens of these genera, however, resemble other didelphids in their occipital morphology, such that both conditions (presence and absence of a supraoccipital margin) can be observed in ontogenetic series of conspecific skulls (Abdala et al., 2001: fig.”
On the Contents of Gracilinanus Gardner and Creighton, 1989, with the Description of a Previously Unrecognized Clade of Small Didelphid Marsupials (2005, background): “Large ontogenetic series of most opossums, for example, show a tendency for older animals to have better-developed temporal scars, lambdoidal crests, and more massive zygomatic arches, but relatively smaller braincases than younger conspecifics (e.g., Tate, 1933; Abdala et al., 2001; Flores et al., ”
PHYLOGENETIC STUDIES ON DIDELPHID MARSUPIALS II. NONMOLECULAR DATA AND NEW IRBP SEQUENCES: SEPARATE AND COMBINED ANALYSES OF DIDELPHINE RELATIONSHIPS WITH DENSER TAXON SAMPLING (2003, background): “The head skeleton is an important source of phylogenetically informative comparisons, but ontogenetic variation resulting from indeterminate postweaning growth must be taken into account when scoring didelphid characters (Abdala et al., 2001).”