. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 326 Bulletin Museum of Comparative Zoology, Vol. 151, No. 6. Figure 2. Representative specimens of the tliree Cerion taxa of tfie Turl<s and Caicos. Left, C. reglna from South Caicos, our sample 753. Middle, C. lewisi horn Parrot Cay, Caicos Bank, MCZ No. 221566. Right, C. to/and/from Salt Cay, Turks Bank, MCZ No. 220913. Note characteristic C. (Umbonis) features of C. blandi: wavy ribs and incised lines perpendicular to the ribs. The C. regina specimen is mm high. We used 29 of our own samples for our morphom
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 326 Bulletin Museum of Comparative Zoology, Vol. 151, No. 6. Figure 2. Representative specimens of the tliree Cerion taxa of tfie Turl<s and Caicos. Left, C. reglna from South Caicos, our sample 753. Middle, C. lewisi horn Parrot Cay, Caicos Bank, MCZ No. 221566. Right, C. to/and/from Salt Cay, Turks Bank, MCZ No. 220913. Note characteristic C. (Umbonis) features of C. blandi: wavy ribs and incised lines perpendicular to the ribs. The C. regina specimen is mm high. We used 29 of our own samples for our morphometric analysis, 23 living and six subfossil. These include 19 from South Cai- cos (14 living, five subfossil), seven from Grand Turk (six living and one subfossil), and three from Providenciales (all living). We then selected 32 additional samples for biometric analysis from the collections of the Department of Mollusks at the Mu- seum of Comparative Zoology. These in- clude 15 samples of the tapering morpho- type (13 from islands that we had not visited, and two from South Caicos—the paratypes of C. caicosense, and C. uto- wana abbotti, both taxa that we regarded as ripe for synonymy). In addition, we measured ten samples of C. blandi and its hybrids with tapering forms, all from Salt Cay on the Turks Bank, and seven samples of C. lewisi from the western Caicos (West Caicos, Providenciales, Pine Cay, Water Cay, Parrot Cay and Ft. George's Cay). Thus, our set of 62 samples represents all taxa (including types and paratypes, where available), on all islands of their recorded and available distribution. Samples are list- ed individually in the appendix with their field or museum numbers and their loca- tion. Figure 1 shows the islands of both banks, while Figures 2 and 3 display the range of form within the Turks and Caicos Cerion fauna (Fig. 2 the contrast among. Please note that these images are extracted from scanned page images that may have been digitally enhanced for read
Size: 1776px × 1406px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
