Imperial College London

Dr. Martin D. Brazeau

Faculty of Natural SciencesDepartment of Life Sciences (Silwood Park)




+44 (0)20 7594 2254m.brazeau




W2.2KennedySilwood Park






BibTex format

author = {Brazeau, MD and Jeffery, JE},
doi = {10.1002/jmor.10609},
journal = {J Morphol},
pages = {654--665},
title = {The hyomandibulae of rhizodontids (Sarcopterygii, stem-tetrapoda).},
url = {},
volume = {269},
year = {2008}

RIS format (EndNote, RefMan)

AB - Despite its important role in the study of the evolution of tetrapods, the hyomandibular bone (the homologue of the stapes in crown-group tetrapods) is known for only a few of the fish-like members of the tetrapod stem-group. The best-known example, that of the tristichopterid Eusthenopteron, has been used as an exemplar of fish-like stem-tetrapod hyomandibula morphology, but in truth the conditions at the base of the tetrapod radiation remain obscure. We report, here, four hyomandibulae, from three separate localities, which are referable to the Rhizodontida, the most basal clade of stem-tetrapods. These specimens share a number of characteristics, and are appreciably different from the small number of hyomandibulae reported for other fish-like stem-tetrapods. While it is unclear if these characteristics represent synapomorphies or symplesiomorphies, they highlight the morphological diversity of hyomandibulae within the early evolution of the tetrapod total-group. Well-preserved muscle scarring on some of these hyomandibulae permit more robust inferences of hyoid arch musculature in stem-tetrapods.
AU - Brazeau,MD
AU - Jeffery,JE
DO - 10.1002/jmor.10609
EP - 665
PY - 2008///
SN - 0362-2525
SP - 654
TI - The hyomandibulae of rhizodontids (Sarcopterygii, stem-tetrapoda).
T2 - J Morphol
UR -
UR -
VL - 269
ER -