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- W2326696502 abstract "Quaternary insect fossils are readily preserved in packrat middens, although few have been systematically studied. Late Wisconsin and Holocene age middens from the San Andres and Fra Cristobal mountains of New Mexico have yielded insect fossil assemblages for paleoenvironmental analysis. While the fossil insect faunas from individual sites are limited in diversity, a paleoenvironmental scenario is constructed which closely agrees with the interpretations of plant macrofossil records from the region. Late Wisconsin climate in south- central New Mexico was cooler and wetter than present, corresponding to an apparent downward elevational displacement of about 1,000 m. A shift to more xeric conditions occurred in the early Holocene. Desert-grassland gave way to desertscrub in the vicinity by Mid-Holocene, and Late Holocene climatic conditions were perhaps the most severe of the last 100,000 years. REsuMEN-Insectos f6siles contenidos en dep6sitos de Neotoma (packrat middens) de edad Tardiglacial (Wisconsin Superior) y Postglacial, han sido estudiados con el objeto de lograr la reconstrucci6n paleoambiental del centro-sur de New Mexico. El material entomol6gico motivo de estudio proviene de distintos sitios muestreados en las sierras de San Andres y Fra Cristobal, New Mexico. Si bien el numero de especies observadas en los dep6sitos es limitado, los espectros obtenidos permiten su correlaci6n con previos estudios paleobotinicos en la region. El Pleistoceno Final se habria caracterizado por un clima mis frio y humedo que el actual, correspondiendo a '1 un desplazamiento altitudinal de la vegetaci6n de aproximadamente 1,000 m. Condiciones mais xericas habrian predominado hacia los inicios del Holoceno, mientras que un matorral desertico habria reemplazado una pradera desertica hacia el Holoceno Medio. Las condiciones ambientales que presenta el Holoceno Superior son las mis severas de los ultimos 100,000 afios. Plant macrofossils and pollen have been analyzed from a large number of packrat (Neotoma) middens throughout desert in the Southwest in recent years. These studies have shed a great deal of light on Quaternary vegetation and climatic change in this region, because of the large number of plant taxa that have been preserved in middens. Insect exoskeletons are also frequently preserved in packrat middens, but these fossils have not been systematically studied until recently. Ashworth (1973) discussed four beetle taxa from a packrat midden in western Texas, and Spilman (1976) described a new species of spider beetle (Ptinidae) from middens in Californina and Arizona. The aim of this study was to provide the first paleoenvironmental analysis of a series of Late Quaternary sites, based on a number of insect fossil assemblages from packrat middens." @default.
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- W2326696502 date "1987-09-28" @default.
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- W2326696502 title "Paleoenvironmental Significance of Late Quaternary Insect Fossils from Packrat Middens in South-Central New Mexico" @default.
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- W2326696502 doi "https://doi.org/10.2307/3671457" @default.
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