Why the Short Face? The Face Lengths of Sthenurine Kangaroos Scale with Negative Allometry

William Richardson; Nuria Melisa Morales-García; John Damuth; Suresh Singh; Christine M. Janis

doi:10.1080/02724634.2024.2336145

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William Richardson,¹ Nuria Melisa Morales-García,¹ John Damuth,^2,* Suresh Singh,¹ Christine M. Janis^1,3,**

¹Bristol Palaeobiology Group, School of Earth Sciences, University of Bristol, Bristol, UK, , nm15309@bristol.ac.uk, ss1314@bristol.ac.uk, glcmj@bristol.ac.uk
²Department of Ecology, Evolution and Marine Biology, University of California, Santa Barbara, CA, 93106, U.S.A.,
³Department of Ecology, Evolution and Organismal Biology, Brown University, Providence, RI, U.S.A.,

^*Deceased.
^**Corresponding author.

Abstract

The larger species in many mammalian clades have relatively longer faces than their smaller relatives. This has been shown to be true for extant kangaroos (Macropodinae), who follow the CREA rule of positive facial allometry; but the extinct short-faced kangaroos (Sthenurinae) have not so far been examined. Using linear measurements, rather than CREA techniques, we show here that sthenurine face lengths scale with negative allometry, thus differing from the trend seen in their extant relatives.

Citation Download Citation

William Richardson, Nuria Melisa Morales-García, John Damuth, Suresh Singh, and Christine M. Janis "Why the Short Face? The Face Lengths of Sthenurine Kangaroos Scale with Negative Allometry," Journal of Vertebrate Paleontology 43(5), (23 April 2024). https://doi.org/10.1080/02724634.2024.2336145

Received: 4 July 2023; Accepted: 18 March 2024; Published: 23 April 2024

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