. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 8. Sibynomorphus oneilli. Representative specimens in dorsal view. Top: left, MUSM 2770 (male, 470 mm SVL) from Hacienda Ticapampa (La Libertad Department); right, MUSM 3103 (female, 469 mm SVL) from Cajabamba (Cajamarca De- partment). Bottom: two specimens from Yuracyacu (Ancash Department): left, MUSM 3211 (female, 413 mm SVL); right, MUSM 3334 (male, 384 mm SVL). specimen from east of the Rio Marafion, and the type locality is the lowest elevation of all known localities (1,646 m). These factors mig
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology; Zoology. Figure 8. Sibynomorphus oneilli. Representative specimens in dorsal view. Top: left, MUSM 2770 (male, 470 mm SVL) from Hacienda Ticapampa (La Libertad Department); right, MUSM 3103 (female, 469 mm SVL) from Cajabamba (Cajamarca De- partment). Bottom: two specimens from Yuracyacu (Ancash Department): left, MUSM 3211 (female, 413 mm SVL); right, MUSM 3334 (male, 384 mm SVL). specimen from east of the Rio Marafion, and the type locality is the lowest elevation of all known localities (1,646 m). These factors might, in part, explain some of the unusual characters of the holotype. The complexity of the terrain inhabited by these populations enhances the potential for isolation and character differentiation among populations. The "new" specimens from Ancash De- partment, herein referred to Sibynomor- phus oneilli, were perplexing because they extend the range of variation in scutella- tion and other characters within S. oneilli. In some cases, the extended ranges ap- proach the character variation within S. vagus. Many of these specimens are much larger (nine of 14 specimens >500 mm to- tal length, with the largest 790 mm total length) than had been known for S. oneilli from the three previously known speci- mens (233—374 mm total length). Further complicating their interpretation was the existence, in the Rio Santa valley, of spec- imens lacking discrete crossbands, a char- acteristic of many of the known specimens of S. vagus (see species account). Thus, whether the "new" specimens represented. 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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