. Breviora. . Figure 13. A-C) the proximal end of the right fibula of Stereophallodon, in A) lateral view, B) medial view, and C) proximal view; D) left fibula of Stereophallodon, actual length unknown; E) Ophiaeodon, and F) Dimetrodon. Stereophallodon draw- ing based on MCZ 6618, Ophiaeodon and Dimetrodon from Romer and Price (1940). Abbreviations: FEM, articular surface for femur; TAR, articular surface for tarsus; TUB, tuber of uncertain function. those of other pelycosaurs in its triangular shape. In Ophiaeodon, Dimetrodon, and Edaphosaurus the proximal end of the fibula is rectangular in
. Breviora. . Figure 13. A-C) the proximal end of the right fibula of Stereophallodon, in A) lateral view, B) medial view, and C) proximal view; D) left fibula of Stereophallodon, actual length unknown; E) Ophiaeodon, and F) Dimetrodon. Stereophallodon draw- ing based on MCZ 6618, Ophiaeodon and Dimetrodon from Romer and Price (1940). Abbreviations: FEM, articular surface for femur; TAR, articular surface for tarsus; TUB, tuber of uncertain function. those of other pelycosaurs in its triangular shape. In Ophiaeodon, Dimetrodon, and Edaphosaurus the proximal end of the fibula is rectangular in end view and has a proximo-distally oriented tuberosity on its lateral edge. The distal end of the fibula of Stereo- phallodon is wide and dorso-ventrally compressed. The astragalar and calcaneal articular surfaces are set at a low angle to each other and are differentiated by a slight narrowing of the distal end of the bone. Ophiaeodon, Edaphosaurus, and Ruthiromia are like Stereo- phallodon in having broad distal ends of the fibulae. In sphenaco- dontines, the distal end of the fibula is narrower Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. , Museum of Comparative Zoology, Harvard University
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