Ecological correlates to cranial morphology in Leporids (Mammalia, Lagomorpha)

The mammalian order Lagomorpha has been the subject of many morphometric studies aimed at understanding the relationship between form and function as it relates to locomotion, primarily in postcranial morphology. The leporid cranial skeleton, however, may also reveal information about their ecology,...

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Bibliographic Details
Published in:PeerJ (San Francisco, CA) CA), 2015-03, Vol.3, p.e844-e844
Main Authors: Kraatz, Brian P, Sherratt, Emma, Bumacod, Nicholas, Wedel, Mathew J
Format: Article
Language:English
Subjects:
Analysis
Anatomy and Physiology
Burrowing behavior
Cranial morphology
Ecology
Evolution
Evolutionary biology
Health sciences
Hypotheses
Lagomorpha
Leporidae
Lepus americanus
Lepus capensis
Locomotion
Mammalia
Monkeys & apes
Morphology
Nesolagus timminsi
Ochotonidae
Phylogeny
Poelagus marjorita
Pronolagus
Pronolagus crassicaudatus
Rabbits
Skull
Sylvilagus
Zoology
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Summary:The mammalian order Lagomorpha has been the subject of many morphometric studies aimed at understanding the relationship between form and function as it relates to locomotion, primarily in postcranial morphology. The leporid cranial skeleton, however, may also reveal information about their ecology, particularly locomotion and vision. Here we investigate the relationship between cranial shape and the degree of facial tilt with locomotion (cursoriality, saltation, and burrowing) within crown leporids. Our results suggest that facial tilt is more pronounced in cursors and saltators compared to generalists, and that increasing facial tilt may be driven by a need for expanded visual fields. Our phylogenetically informed analyses indicate that burrowing behavior, facial tilt, and locomotor behavior do not predict cranial shape. However, we find that variables such as bullae size, size of the splenius capitus fossa, and overall rostral dimensions are important components for understanding the cranial variation in leporids.
ISSN:2167-8359
2167-8359
DOI:10.7717/peerj.844