File:Bulletin of the Museum of Comparative Zoology at Harvard College (1969) (19871187493).jpg

Title: Bulletin of the Museum of Comparative Zoology at Harvard College
Identifier: bulletinofmuseum138harv (find matches)
Year: 1969 (1960s)
Authors: Harvard University. Museum of Comparative Zoology
Subjects: Zoology
Publisher: Cambridge, Mass. : The Museum
Contributing Library: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
Digitizing Sponsor: Harvard University, Museum of Comparative Zoology, Ernst Mayr Library

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78 Bulletin Museum of Comparative Zoology, Vol. 138, No. 3
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Figure 15. Summary of the general patterns of biogeographic movements. Heavy arrows Indicate colonization from South America (they are not meant to imply exact paths). Two major movements are postulated. One is to the Greater Antilles, with subsequent colonization of the northern Lesser Antilles. This gave rise to the bimaculalus group. The second is to the southern Lesser Antilles, where the roquet group evolved. Light arrows indicate general movements within the species groups, as discussed in the text. The double horizontal line indicates the geographic break between the two Lesser Antil- lean species groups. Utilizing the data from chromosomes and LDH, we can propose a model of the prob- able phylogenetic history of the Puerto Rican and northern Lesser Antillcan anoles (Fig. 14). There is only one inconsistency between this model and Etheridge's classification of anoles. Puerto Rican members of the cris- tatellu.s group have a derived karyotype. The common Hispaniolan species A. cij- hotes has the primitive alpha karyotype (2n=36) with the absence of sex chromo- somal heteromorphism (Gorman and Atkins, 1966). Yet Ethcridgc (1960) places this species in the cristatellus group on the basis of osteology. It shares with the other members of this group not only the same osteological formulas (such as number of attached and free parasternals), but also an osteological character almost unique to the group—"jaw sculpturing" (one or more deep semilunar excavations on the lower surface of the dentary in adult males). If we are to reconcile this conflict, we could assume

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