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JOURNAL OF MORPHOLOGY 211:147-163 (1992) The Comparative Myology of the Thigh and Crus in the
 

Summary: JOURNAL OF MORPHOLOGY 211:147-163 (1992)
The Comparative Myology of the Thigh and Crus in the
SalamandersAmbystoma tigrinum and Dicamptodon
tenebrosus
MIRIAM A. ASHLEY-ROSS
Department ofEcology and EvolutionaryBiology, Universityof California,
lruine, California92717
ABSTRACT Variation in myology of the hind limb among salamanders has
been poorly characterized. Nineteen major hind limb muscles of Ambystoma
tigrinum (Ambystomatidae) and Dicamptodon tenebrosus (Dicamptodontidae)
were studied to provide baseline descriptive data on hind limb myology in
salamanders and to generate hypotheses of hind limb muscle function. Most
superficial muscles of the hind limbs span multiple joints, including a unique
three-joint muscle, the ischioflexorius, that extends from the pelvic girdle to
the plantar fascia. The deeper hind limb muscles span single joints. No
myological differences were observed between the hind limbs of A. tigrinum
larvae and individuals that had just metamorphosed. Fully adult tiger sala-
manders that had been housed in terraria for many years had hypertrophied
femorofibularis and ischiofemoralis muscles, a condition similar to that re-
ported in Paramesotriton and Taricha,which engage in terrestrial locomotion.

  

Source: Ashley-Ross, Miriam A. - Department of Biology, Wake Forest University

 

Collections: Environmental Sciences and Ecology; Biology and Medicine