. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. B -T^ 'V^pal. I cm. c Fig. 5. A. Emydops longus paratype () R4957. Palate, x f. B-C. Myosauroides minnaari type , x f. Anterior palate and dorsal view of mandible respectively. COMPARISON WITH OTHER DICYNODONTS At present, three genera especially appear to have significant resemblances, and possible affinities, with Myosaurus. These are Emydops, Cistecephalus and Myosauroides. The Upper Permian Emydops (Fig. 5A) has been mentioned as a possible Myosaurus ancestor by H
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. B -T^ 'V^pal. I cm. c Fig. 5. A. Emydops longus paratype () R4957. Palate, x f. B-C. Myosauroides minnaari type , x f. Anterior palate and dorsal view of mandible respectively. COMPARISON WITH OTHER DICYNODONTS At present, three genera especially appear to have significant resemblances, and possible affinities, with Myosaurus. These are Emydops, Cistecephalus and Myosauroides. The Upper Permian Emydops (Fig. 5A) has been mentioned as a possible Myosaurus ancestor by Haughton (1917) and, although the genus has many clearly primitive characters, it does include features which deserve consideration. These are a definite palatine-premaxilla contact, a long narrow interpterygoidal vacuity, and a thin, steep vomerine septum dividing the internal nares. The palatine, in contrast to Myosaurus, is still well developed and received the bite of the lower jaw teeth during mastication, but in the upper jaw teeth are vestigial and apparently of no great functional significance. In the skull roof the propor- tions of intertemporal to interorbital width are close to those of Myosaurus, but the postorbital is not flared laterally above the temporal fenestra and instead forms the vertical border of the intertemporal bar. A large postfrontal, lost in the more progressive smaller genera, is still present, as is the preparietal. The lower jaw has a row of functional teeth on the medial edge of the dentary, but anteriorly no dentary table is formed and a shovel-like tip, basically similar to that of Myosaurus, is 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 South African Museum. Cape Town : The Museum
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
