Ontogenetic and secondary sexual dimorphism variation in Platalina genovensium (Chiroptera: Phyllostomidae)

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Abstract

All rights reserved. Ontogenetic development and sexual dimorphism in bats are aspects frequently studied; however, this information is not available for Platalina genovensium, a threatened bat species that occurs in dry ecosystems between Peru and Chile. In this study, I present the first information about the ontogeny and sexual dimorphism of the species based on the review of collection specimens. I analyzed 31 specimens including juveniles and adults to assess ontogeny. Sexual dimorphism was tested by statistical and multivariate analysis using one external and 14 cranio-dental variables on adults only. Descriptions of juvenile (age class I) and adult stages (age classes IV and V) are presented, as well as the skull of a fetus. I found that the forearm length did not present statistically supported differences between sexes, whereas at the cranial-dental level, the mandibular branch width was the main dimorphic variable. I suggest that the differences reported between juvenile and adult specimens and between females and males should be understood from the perspective of evolution and adaptation and not only ontogenetically.
Original languageAmerican English
Pages (from-to)201-210
Number of pages10
JournalRevista Peruana de Biologia
Volume26
Issue number2
DOIs
StatePublished - 1 Jan 2019

Keywords

  • Age
  • Fetus
  • Mandible
  • Morphology
  • Skull
  • Variation

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