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From the same journal

The evolution of cranial base and face in Cercopithecoidea and Hominoidea: Modularity and morphological integration

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Published copy (DOI)

Author(s)

  • Antonio Profico
  • Paolo Piras
  • Costantino Buzi
  • Fabio Di Vincenzo
  • Flavio Lattarini
  • Marina Melchionna
  • Alessio Veneziano
  • Pasquale Raia
  • Giorgio Manzi

Department/unit(s)

Publication details

JournalAMERICAN JOURNAL OF PRIMATOLOGY
DateAccepted/In press - 10 Oct 2017
DatePublished (current) - 1 Dec 2017
Issue number12
Volume79
Original languageEnglish

Abstract

The evolutionary relationship between the base and face of the cranium is a major topic of interest in primatology. Such areas of the skull possibly respond to different selective pressures. Yet, they are often said to be tightly integrated. In this paper, we analyzed shape variability in the cranial base and the facial complex in Cercopithecoidea and Hominoidea. We used a landmark-based approach to single out the effects of size (evolutionary allometry), morphological integration, modularity, and phylogeny (under Brownian motion) on skull shape variability. Our results demonstrate that the cranial base and the facial complex exhibit different responses to different factors, which produces a little degree of morphological integration between them. Facial shape variation appears primarily influenced by body size and sexual dimorphism, whereas the cranial base is mostly influenced by functional factors. The different adaptations affecting the two modules suggest they are best studied as separate and independent units, and that—at least when dealing with Catarrhines—caution must be posed with the notion of strong cranial integration that is commonly invoked for the evolution of their skull shape.

    Research areas

  • covariance ratio, cranial integration, geometric, morphometrics, phylogenetic signal, primates

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