. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 8. Comparative series of arctostylopid (A-H) and primitive notoungulate (I) upper dentitions. Teeth standardized to size and reversed where necessary. A, Arctostylops steini(MCZ 20004); B, Palaeostylops iturus (AMNH 22143); C, Gashatostylops macrodon (cast, AMNH 109521); D, Anatolostylops dibius (IVPP V4357); E, undescribed genus and species (unnumbered IVPP specimen); F, Bothhostylops progressus (IVPP ); G, Allostylops periconatus (IVPP V5043); H, Asiostylops spanios (IVPP V5042); I. Peripantostylops mi
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Figure 8. Comparative series of arctostylopid (A-H) and primitive notoungulate (I) upper dentitions. Teeth standardized to size and reversed where necessary. A, Arctostylops steini(MCZ 20004); B, Palaeostylops iturus (AMNH 22143); C, Gashatostylops macrodon (cast, AMNH 109521); D, Anatolostylops dibius (IVPP V4357); E, undescribed genus and species (unnumbered IVPP specimen); F, Bothhostylops progressus (IVPP ); G, Allostylops periconatus (IVPP V5043); H, Asiostylops spanios (IVPP V5042); I. Peripantostylops minutus (AMNH 28494). Distribution. Late Paleocene {fide Li and Ting, 1983), Asia. Diagnosis. Generally primitive ?arcto- stylopids similar to Asiostylops spanios in the low -crowned cheek-teeth, the small size f P\ and the presence of a paracone fold on the ectoloph of at least some upper mo- lars, hut differing from that species in hav- ing a hypocone on M2. Differs from ad- vanced arctostylopids (Palaeostylops, Arctostylops, Gashatostylops, Anatolo- stylops) in having lower-crowned cheek- teeth, a smaller P3, smaller upper molar parastyles, and a broadly expanded pos- terior cingulum on M1. Allostylops is dis- tinct from all forms in the family save ;omparative series of arctostylopid (A-E) and primitive notoungulate (F) lower dentitions. Teeth standardized to size j reversed where necessary. A. Arctostylops steini (MCZ 20004); B, Palaeostylops iturus (AMNH 20414); C, Gashatostylops rodon(AMNH 21741); D, Bothhostylops progressus (P^, IVPP ; M2, IVPP ; M3 outline, IVPP )- E. Asiostylops spanios (IVPP V5042); F, Peripantostylops minutus (AMNH 28494).. 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. : The Museum
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