. Bulletin. Natural history; Natuurlijke historie. MAMMALIAN ORDER TAENIODONTA 65. Fig. 19. The reconstructed manus of Psittacothenum multijragum, based primarily on AMNH 2453. Scale is 4 cm long. specimen of Psittacotherium. There were almost surely five metacarpals, although only metacarpals two through four and the distal end of five are known. Mis- cellaneous phalanges of Psittacotherium are known. Psittacotherium probably had a single proximal phalanx and an ungual phalanx on the first digit and a full set of proximal, medial and ungual phalanges on digits two through five. Overall, the m
. Bulletin. Natural history; Natuurlijke historie. MAMMALIAN ORDER TAENIODONTA 65. Fig. 19. The reconstructed manus of Psittacothenum multijragum, based primarily on AMNH 2453. Scale is 4 cm long. specimen of Psittacotherium. There were almost surely five metacarpals, although only metacarpals two through four and the distal end of five are known. Mis- cellaneous phalanges of Psittacotherium are known. Psittacotherium probably had a single proximal phalanx and an ungual phalanx on the first digit and a full set of proximal, medial and ungual phalanges on digits two through five. Overall, the mutual relationships of the elements of the manus of Psittacother- ium are very similar to those of the elements of the manus of Onychodectes. However, the manus of Psittacotherium is relatively shorter and heavier than that of Onychodectes. This is especially seen in the second through fourth digits. In Psittacotherium the proximal portions of the digits are shorter and stouter than in Onychodectes, with greatly enlarged, laterally compressed and recurved un- guals distally. What little is known of the manus of Wortmania is smaller, but otherwise nearly identical to that of Psittacotherium. Pelvic Girdle and Hindlimb Pelvis and Vertebrae Wortman (1897b, p. 82-87, figs. 15-20) described and illustrated a pelvis and fourteen vertebrae (two posterior dorsal, three lumbar, and nine caudal vertebrae, AMNH 2455) from the Torrejonian of the San Juan Basin, New Mexico, which he attributed to Psittacotherium. Matthew (1937, p. 266) doubted that this spec- imen belonged to Psittacotherium and suggested that it might be referable to Pantolambda cavirictus; however, he evidently still used it in his restoration of Psittacotherium (Matthew 1937, pi. 64). Simons (1960, p. 19-20, pi. 16B) pho- tographically illustrated and discussed this pelvis, comparing it to pelves of Pa- leocene pantodonts discovered since Matthew's work. Simons (1960) tentatively referred it to Pantolambda cavirictus, an
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