. Bulletins of American paleontology. 208 Bulletin 357 CO "x < 75 m indicated in boldface. Data for the ordinations are occurrences (presence-absence or ranked abundance) of the 254 moUuscan genera or subgenera listed in Appendix 3. 300 CO 'X < < O Q 200. 100 - 1 110 155 Depth (m) 200 CM CO x < < o Q 4UU - 300 - 4 3 23 12 e 2 11 200- 1 'â 27 ' 24 _ 22 8 '8uie 28 100 - IB 28 17 16 21 32 31 -T 1 1 r 8 9 10 11 12 Age (Ma) Text-figure 16.âDCA axis scores versus age and depth of water for the 37 molluscan faunules as numbered in Table 3. Data for the ordination analyses were ran
. Bulletins of American paleontology. 208 Bulletin 357 CO "x < 75 m indicated in boldface. Data for the ordinations are occurrences (presence-absence or ranked abundance) of the 254 moUuscan genera or subgenera listed in Appendix 3. 300 CO 'X < < O Q 200. 100 - 1 110 155 Depth (m) 200 CM CO x < < o Q 4UU - 300 - 4 3 23 12 e 2 11 200- 1 'â 27 ' 24 _ 22 8 '8uie 28 100 - IB 28 17 16 21 32 31 -T 1 1 r 8 9 10 11 12 Age (Ma) Text-figure 16.âDCA axis scores versus age and depth of water for the 37 molluscan faunules as numbered in Table 3. Data for the ordination analyses were ranked abundances of the 254 genera or subgenera listed in Appendix 3. partially resolved when we incorporate extensive new collections from the same three sedimentary basins, and from the transisthmian Chuqunaque Basin in Dar- ien, that are now being processed. The differences in numbers of taxa between PPP and earlier collections reflect greater collecting effort, and are not unique to the three basins sampled. For example, Jung's (1965) description of the early Middle Miocene Cantaure Formation was based on oil com- pany reconnaissance collections that produced 109 genera and subgenera and 146 species. In contrast, re- peated collecting over more than ten years by Jack and Winifred Gibson-Smith from the same localities at Cantaure produced 471 genera and subgenera and 737 species now at the Naturhistorisches Museum in Basel (unpubl. PPP-NMB taxonomic database compiled by Felix Wiedenmayer). Likewise, published faunas from the Mare Formation (Weisbord, 1962, 1964) include 164 genera and subgenera and 226 species, versus 352 genera and subgenera and 531 species in the Gibson- Smith collections (ibid.). Despite all these caveats about sampling, a number. 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 Paleont
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