SPHENOPHRYNE - American Museum of Natural History
SPHENOPHRYNE - American Museum of Natural History
SPHENOPHRYNE - American Museum of Natural History
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2000 ZWEIFEL: PARTITION OF <strong>SPHENOPHRYNE</strong><br />
111<br />
Fig. 68. Dorsal (upper) and ventral views <strong>of</strong> skulls <strong>of</strong> Austrochaperina and Liophryne. A. A. rivularis,<br />
AMNH A84445. B. L. rhododactyla, BPBM 9793. C. L. allisoni, BPBM 9631. Scale bars measure<br />
5 mm.<br />
primitive in that they possess, in addition to<br />
the elements mentioned above, a cartilaginous<br />
omosternum. According to Parker<br />
(1934), only one microhylid genus, Dyscophus<br />
<strong>of</strong> Madagascar, has a bony style to the<br />
omosternum, and none has a bony sternum.<br />
The sternum shows some degree <strong>of</strong> mineralization<br />
in almost all the species studied,<br />
although it is slight in one <strong>of</strong> two Austrochaperina<br />
basipalmata and one <strong>of</strong> three<br />
Sphenophryne cornuta and is very slight in<br />
an Oxydactyla coggeri. The exception is O.<br />
Fig. 69. Hyoids <strong>of</strong> Oxydactyla, Austrochaperina, and Liophryne in ventral view. Light stipple<br />
indicates cartilage, denser stipple mineralization. Proportions <strong>of</strong> bony posteromedial processes, which<br />
pass into the plane <strong>of</strong> the drawing, are distorted by foreshortening. A. O. stenodactyla, AMNH<br />
A66049. B. A. brevipes, AMNH A130527. C. L. rhododactyla, BPBM 9793. Scale lines marked in<br />
millimeters.