. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 28. Hemipenis morphology in the South American genus Lygophis; semldiagrammatic. The organ Is uneverted and dissected in situ. A, Lygophis lineatus, MCZ 80994; B, Lygophis boursieri, MCZ 36948. Approx. X 5. and Colombia) is very close to andreae and parvifrons in both skull and hemipenial characters, as well as in external scale pat- tern. From this incomplete study of Lygophis., it seems possible that we may be dealing with a compound genus of distantly re- lated forms. The evidence seems to sug- gest that L. bo
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 28. Hemipenis morphology in the South American genus Lygophis; semldiagrammatic. The organ Is uneverted and dissected in situ. A, Lygophis lineatus, MCZ 80994; B, Lygophis boursieri, MCZ 36948. Approx. X 5. and Colombia) is very close to andreae and parvifrons in both skull and hemipenial characters, as well as in external scale pat- tern. From this incomplete study of Lygophis., it seems possible that we may be dealing with a compound genus of distantly re- lated forms. The evidence seems to sug- gest that L. boursieri might be placed in a separate genus with andreae and parvi- frons as a specialized radiation, perhaps derived from mainland Alsophis; and that the type of Lygophis, L. lineatus, may need to be synonymized with Dromicus from which it differs primarily in th(> lack of scale pits and the presence of basal hooks on the hemipenis (Roze, 1964). However, we must await more detailed taxonomic work to clarify these issues.^ Nevertheless, it seems clear that generic distinctions be- tween Dromicus (present concept) and ^ In a reappraisal of South American snakes related to LijgopJiis boursieri, Myers (1969) established the boursieri species group including Rhadinaea antioquien,sis, R. tiistriata, and L. boursieri. The group is placed in Lijgophis "... simply because boursieri already resides ; But the artificiality of the resulting genus is clearly pointed out, and the necessity of generic reassignment 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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