Cranial ontogeny of<i>Caluromys philander</i>(Didelphidae: Caluromyinae): a qualitative and quantitative approach

Flores, David A.; Abdala, Fernando; Giannini, Norberto P.

doi:10.1644/09-mamm-a-291.1

Cited by 51 publications

(48 citation statements)

References 34 publications

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“…Negative allometry of the braincase and sensory capsules through ontogeny is a general pattern that has also been observed in other carnivorous or omnivorous metatherian mammals such as D. albopunctatus, Lutreolina crassicaudata (Desmarest, 1804), D. albiventris, and Caluromys philander (Linnaeus, 1758) (Abdala et al 2001;Flores et al 2003Flores et al , 2006Flores et al , 2010 and could be linked to the retention of a plesiomorphic feature. Indeed, negative allometry of some sensory capsules (e.g., orbits) was detected in static interspeciWc allometric studies (Finarelli and Goswami 2009;Noble et al 2000;Ravosa et al 2000) made only on adult specimens, which was related to encephalization and orbit orientation.…”

Section: Ontogeny and Feeding Performancementioning

confidence: 58%

“…Because of its complexity, the skull has been the focus of several ontogenetic studies in Mammalia, exploring how adult morphology and function are achieved (e.g., Flores et al 2006Flores et al , 2010Giannini et al 2004;Wayne 1986). In this context, mammalian cranial ontogeny is relevant to understand the relationship between form and function in a developmental, ecological, and evolutionary context.…”

Section: Introductionmentioning

confidence: 99%

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A quantitative approach to the cranial ontogeny of Lycalopex culpaeus (Carnivora: Canidae)

Segura

Prevosti

2012

Zoomorphology

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The study of cranial ontogeny is important for understanding the relationship between form and function in developmental, ecological, and evolutionary contexts. The transition from lactation to the diet of adult carnivores must be accompanied by pronounced modiWcations in skull morphology and feeding behavior. Our goal was to study relative growth and development in the skull ontogeny of the canid Lycalopex culpaeus, and interpret our Wndings in a functional context, thereby exploring the relationship between changes in shape and size with dietary habits and age stages. We performed quantitative analyses, including multivariate allometry and geometric morphometrics. Our results indicate that shape changes are related to functional improvements of the jaw mechanics related for food catching/processing. Estimates of full muscle size, mechanical advantage, and adult cranial shape are reached after sexual maturity, while adult mandible and skull size are reached after weaning, which is related to diet change (incorporation of meat and other food items). The ontogenetic pattern observed in L. culpaeus is similar to those observed in Canis familiaris and C. latrans. However, the magnitude of change seen in L. culpaeus is smaller than those seen in the felid Puma concolor and considerably smaller than those seen in the bone cracker hyaenid Crocuta crocuta. These patterns are associated with dietary habits and specializations in skull anatomy, as L. culpaeus, domestic dog and coyote are generalist species compared with hypercarnivores such as C. crocuta and P. concolor.

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Section: Ontogeny and Feeding Performancementioning

confidence: 58%

Section: Introductionmentioning

confidence: 99%

A quantitative approach to the cranial ontogeny of Lycalopex culpaeus (Carnivora: Canidae)

Segura

Prevosti

2012

Zoomorphology

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“…c Boxplots of Procrustes distance of each specimen of all age-classes respect to the mean of age-class 3. d Boxplots of centroid size versus age crassicaudata (Desmarest 1804) and Caluromys philander (Linnaeus 1758) (Abdala et al 2001;Flores et al 2003Flores et al , 2010Sebastião and Marroig 2013); based on those results, a general change pattern for the order was proposed (Flores et al 2003;Sebastião and Marroig 2013); and also, the allometric tendencies of those didelphids and other marsupials were mapped on a phylogeny (Flores et al 2013(Flores et al , 2014. In this context, the analysis of a mouse opossum is interesting, in order to see whether it follows the general pattern reported for the larger species.…”

Section: Discussionmentioning

confidence: 99%

“…Several ontogenetic studies have been performed in didelphid marsupials (e.g., Maunz and German 1996;Abdala et al 2001;Flores et al 2003Flores et al , 2010Sebastião and Marroig 2013), but only the first and the last discriminated the ontogenetic pattern of males and females. Maunz and German (1996) analyzed the ontogenetic trajectory of males and females of Monodelphis domestica (Wagner 1842), using skull measurements, and discriminating between splanchnocranium and neurocranium.…”

Section: Introductionmentioning

confidence: 99%

Peramorphic males and extreme sexual dimorphism in Monodelphis dimidiata (Didelphidae)

Chemisquy

2015

Zoomorphology

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The southern short-tailed opossum, Monodelphis dimidiata, is a species known not only for its semelparous life cycle, but also for the extreme sexual dimorphism of adults, where males are not only larger, but also have distinctive morphological characters in their skull. Using geometric morphometrics and a suite of statistical tests, I analyzed the postweaning ontogenetic development of this species in order to evaluate the ageclass where sexual dimorphism becomes significant and the amount of change exhibited by both sexes. My results showed that M. dimidiata partly follows the ontogenetic pattern described for didelphids by previous authors. The character that escapes the general pattern is rostral length, which becomes shorter instead of lengthening throughout the development. This change could be related to an increment in the bite force in the anterior part of the dentition. The amount of sexual dimorphism found for this species is larger than the reported previously for other American marsupials, and I also found a higher rate of growth in males at the attaining of sexual maturity. Based on my results and the information available for other didelphids, I can suggest that M. dimidiata males undergo through a process of hypermorphosis, resulting in a peramorphic condition. It is possible that the extreme sexual dimorphism present in this species is related to reproductive success, specially taking into account their semelparous life cycle.

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“…(Flores et al 2003). Caluromys philander também apresenta predominantemente caracteres negativamente alométricos e isométricos (Flores et al 2010). Baseados nos coeficientes alométricos destes trabalhos são descritas as seguintes transformações para estes gêneros: uma diminuição da caixa craniana em espécimes mais velhos; o palato se torna mais delgado, seguido por uma elongação do rostro com um todo; e o espaço temporal se expande para dentro aumentando o espaço dos músculos temporais (Flores et al 2003(Flores et al , 2010 (Gould 1977).…”

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Evolução morfológica de marsupiais (Didelphimorphia, Didelphidae) do Novo Mundo

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Cranial ontogeny ofCaluromys philander(Didelphidae: Caluromyinae): a qualitative and quantitative approach

Cited by 51 publications

References 34 publications

A quantitative approach to the cranial ontogeny of Lycalopex culpaeus (Carnivora: Canidae)

A quantitative approach to the cranial ontogeny of Lycalopex culpaeus (Carnivora: Canidae)

Peramorphic males and extreme sexual dimorphism in Monodelphis dimidiata (Didelphidae)

Evolução morfológica de marsupiais (Didelphimorphia, Didelphidae) do Novo Mundo

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