2 Works

Using 2D dental geometric morphometrics to identify modern Perognathus and Chaetodipus specimens (Rodentia, Heteromyidae)

Megan R Wyatt, Samantha S B Hopkins & Edward B Davis
The Heteromyidae (pocket mice and kangaroo rats) are a group of extant small rodents abundant in western North America, as well as in fossil assemblages over the last 20 million years. Two genera of heteromyids, Chaetodipus and Perognathus, share similar tooth morphology and teeth are the primary fossil remains. Previous genetic studies show these extant sister genera likely diverged in the middle Miocene (~16 million years ago); however, the Chaetodipus fossil record starts in the...

Reduced sexual size dimorphism in a pipefish population where males do not prefer larger females

Nuno Monteiro, Mário Cunha, Nídia Macedo, Jonathan Wilson, Gunilla Rosenqvist & Anders Berglund
Within a species’ distribution, populations are often exposed to diverse environments and may thus experience different sources of both natural and sexual selection. These differences are likely to impact the balance between costs and benefits to individuals seeking reproduction, thus entailing evolutionary repercussions. Here, we look into an unusual population (Baltic Sea) of the broadnosed pipefish, Syngnathus typhle, where males do not seem to select females based on size and hypothesise that this pattern may...

Registration Year

  • 2021

Resource Types

  • Dataset


  • Department of Earth Sciences
  • Centre de Biologie du Développement
  • University of Porto
  • Lusíada University of Porto
  • Stony Brook University