2020
DOI: 10.1073/pnas.1917836117
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Convergent evolution of olfactory and thermoregulatory capacities in small amphibious mammals

Abstract: Olfaction and thermoregulation are key functions for mammals. The former is critical to feeding, mating, and predator avoidance behaviors, while the latter is essential for homeothermy. Aquatic and amphibious mammals face olfactory and thermoregulatory challenges not generally encountered by terrestrial species. In mammals, the nasal cavity houses a bony system supporting soft tissues and sensory organs implicated in either olfactory or thermoregulatory functions. It is hypothesized that to cope with aquatic e… Show more

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Cited by 41 publications
(79 citation statements)
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“…Most amphibious mammals, and amphibious vertebrates in general, swim using hind-foot and tail propulsion (Hickman 1979;Samuels and van Valkenburgh 2008), which is thought to select for elongate hind feet and powerful, long tails that are often laterally compressed or augmented with stiff vertically oriented hairs (Voss 1988;Rowe et al 2014). Our observations of increased HBL, mass, RHF, and RTL support these existing hypotheses of convergent evolution in Amphibious species (Kerbis Peterhans and Patterson 1995;Meiri 2008;Rowe et al 2014;Martinez et al 2020).…”
Section: Do Single or Multiple Traits Covary With Locomotion?supporting
confidence: 89%
“…Most amphibious mammals, and amphibious vertebrates in general, swim using hind-foot and tail propulsion (Hickman 1979;Samuels and van Valkenburgh 2008), which is thought to select for elongate hind feet and powerful, long tails that are often laterally compressed or augmented with stiff vertically oriented hairs (Voss 1988;Rowe et al 2014). Our observations of increased HBL, mass, RHF, and RTL support these existing hypotheses of convergent evolution in Amphibious species (Kerbis Peterhans and Patterson 1995;Meiri 2008;Rowe et al 2014;Martinez et al 2020).…”
Section: Do Single or Multiple Traits Covary With Locomotion?supporting
confidence: 89%
“…2016; Grossnickle 2020, Martinez et al. 2020). Nonetheless, a more nuanced consideration of our results reveals a lack of evidence for complete convergence, as demonstrated by the phylomorphospace trajectories, divergence among marsupials, model‐fitting results, and elevated morphological disparity of gliders.…”
Section: Discussionmentioning
confidence: 99%
“…We follow Martinez et al. (2020) in referring to these as “BM1m” models. Although rates are constant across regimes, they are allowed to vary among traits (i.e., the five PCs), which is a default mvMORPH setting.…”
Section: Methodsmentioning
confidence: 99%
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