. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ft#ft&ftn^ A. ^^^.frrfti^g^fa&E B Figure 3. Leptorycteropus guilielmi gen. et sp. nov. Lateral, A, and medial, B, views of portion of left ramus. X 3. of these and the last dorsal would require more than one vertebra to bridge the gap. The trunk formula was therefore probably the same, namely D. 13, L. 8. The caudal vertebrae are proportionally as large, The presacral vertebrae differ consis- tently from those of Orycteropus in having flatter centra that are shallower dorso- ventrally relative to their widths,
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. ft#ft&ftn^ A. ^^^.frrfti^g^fa&E B Figure 3. Leptorycteropus guilielmi gen. et sp. nov. Lateral, A, and medial, B, views of portion of left ramus. X 3. of these and the last dorsal would require more than one vertebra to bridge the gap. The trunk formula was therefore probably the same, namely D. 13, L. 8. The caudal vertebrae are proportionally as large, The presacral vertebrae differ consis- tently from those of Orycteropus in having flatter centra that are shallower dorso- ventrally relative to their widths, and in having the pedicles less notched posteriorly. No doubt other minor differences between the two would be apparent were those vertebrae better preserved, but almost all of them have all processes broken off. The left metapophysis of L. 6 is in fact the only nearly complete one present; it differs from the corresponding process of Orycteropus in being more vertically directed, relatively higher and less expanded dorsally. Other distinctions detected are: the dorsal portion of the transverse process of C. 6 rises more ventrally1; the base of the transverse process of D. 6(?) is narrower anteroposte- riorly, oval in section with the long axis dorsoventral; the anapophyses of D. 11-12, to judge from the remains, were longer and more slender; and the hypapophyses of L. 4-5 are relatively deeper. Colbert (1941: 322) pointed out that the zygapophyses of the lumbars of O. gandryi are not as con- cave and convex—hence less interlocking— as those of the living species. This is like- 1C. 7 has no vertebrarterial canal. Sonntag (1926: 455) and Colbert (1941: 322) state that this is present in the corresponding vertebra of Orycteropus. It is a variable character, however, as is shown by two specimens in the museum collections that lack Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and ap
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