. Annual report - Western Society of Malacologists. Mollusks; Mollusks. Figure ]. Opis triangulata (Cooper, 1894). A (left): Lectotype CAS 624 from Point Loma Formation, Point Loma. San Diego Co., California, right valve. X2. B (right): Hypotype SDNHM 33990 from Point Loma Formation, SDNHM loc. 3402, near Carlsbad Airport, San Diego Co., California, right valve hmge, XL Sampling bias in the Neogene of California: diversity and extinction in the Pectinidae Travis J. Smith Department of Ecology, Behavior, and Evolution University of California, San Diego, 9500 Oilman Drive, LaJolla, CA 92037 jts
. Annual report - Western Society of Malacologists. Mollusks; Mollusks. Figure ]. Opis triangulata (Cooper, 1894). A (left): Lectotype CAS 624 from Point Loma Formation, Point Loma. San Diego Co., California, right valve. X2. B (right): Hypotype SDNHM 33990 from Point Loma Formation, SDNHM loc. 3402, near Carlsbad Airport, San Diego Co., California, right valve hmge, XL Sampling bias in the Neogene of California: diversity and extinction in the Pectinidae Travis J. Smith Department of Ecology, Behavior, and Evolution University of California, San Diego, 9500 Oilman Drive, LaJolla, CA 92037 The fossil record is widely recognized as a powerful tool in the study of temporal trends in diversity. However, to utilize the fossil record to its fullest potential requires quantitative assessment of the effect of sampling bias on the diversity patterns in question. The Neogene fossil record of Cahfomia is relatively well sampled and provides a good system for studying the effects of sampling on diversity patterns. A compiled database for the family Pectinidae that includes over 2500 species occurrences at 3000 Neogene localities in California is used to analyze the effects of sampling on both species diversity and extinction rates using the lazarus metric. Two major peaks in extinction rates prior to the late Pliocene are followed by peaks in the lazarus metric. This implies that, excluding the late Pliocene, the extinction rate of pectinid species remained relatively constant throughout the Miocene and early Pliocene. The Western Society of Malacologisis Annual Report. Vol. 32. p. 46. 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 Western Society of Malacologists. Pomona, Calif. , Western Society of Malacologists
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectmollusks
