. Bulletins of American paleontology. Wisconsin Mollusks: Browne and Brlder 213. SE Locality 9 NW Columella alticola, a species which is intolerant of high tem- peratures, was recovered only from the upper part of the section (intervals 25 to 30 feet). Thus, the climate probably became cooler. This seems to be borne out by the increase in numbers of Euconulus fulvus, another species which thrives in the cooler areas of the north. SYSTEMATIC PALEONTOLOGY GENERAL STATEMENT In the description of species which follows data records for both the ecology (habitat) and distribution of the individual s
. Bulletins of American paleontology. Wisconsin Mollusks: Browne and Brlder 213. SE Locality 9 NW Columella alticola, a species which is intolerant of high tem- peratures, was recovered only from the upper part of the section (intervals 25 to 30 feet). Thus, the climate probably became cooler. This seems to be borne out by the increase in numbers of Euconulus fulvus, another species which thrives in the cooler areas of the north. SYSTEMATIC PALEONTOLOGY GENERAL STATEMENT In the description of species which follows data records for both the ecology (habitat) and distribution of the individual species are a compilation of information assembled from articles by various authors. Data for distribution records were compiled from the follow- ing articles: Archer 1948, Baker 1928, Branson, Taylor, and Taylor 1962, Cheatum and Allen 1965, Conkin and Conkin 1962, Getz and Hibbard 1965, Hibbard and Taylor 1960, Hubricht 1961, 1962, 1964, 1965, La Rocque 1963, Leonard 1950, 1952, Leonard and Frye 1960, 1962, Pilsbry 1940, 1946, 1948, Roscoe 1961, 1963, Roy 1962, 1963, 1964, Taylor 1960 and Tuthill, Laird, and Frye 1964. Pilsbry 1940, 1946, and 1948 was the principal source for recent distribution records on the terrestrial molluscs and Baker (1928) for recent distribution records on the aquatic 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 Paleontological Research Institution (Ithaca, N. Y. ); Columbia University. Ithaca, N. Y. , Paleontological Research Institution [etc. ]
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