Hostname: page-component-586b7cd67f-t7fkt Total loading time: 0 Render date: 2024-11-25T14:27:17.778Z Has data issue: false hasContentIssue false
  • English
  • Français

Speciation and Age Revision of the Atacaman Snail Bostryx variabilis Herm

Published online by Cambridge University Press:  20 January 2017

Alan K. Craig
Alan K. Craig*
Affiliation:
Department of Geography, Florida Atlantic University, Boca Raton, Florida 33431 USA
Get access Rights & Permissions [Opens in a new window]

Abstract

Field evidence from the Atacama Desert of northern Chile indicates that the stratigraphic position of the land snail Bostryx variabilis Herm has been incorrectly assigned to a marine series of the lower Pleistocene. Isotopic dating proves that the snail is a recently extinct Holocene taxon requiring no special paleoenvironmental explanations for its presence. However, the snail appears to offer an example of stress-induced speciation in confirmation of the “punctuated equilibrium” theory of evolution. It was probably transported from a fog oasis mountain habitat to a lower, hyperarid hostile environment by a sudden mudflow.

Type
Original Articles
Information
Quaternary Research , Volume 23 , Issue 3 , May 1985 , pp. 382 - 387
Copyright
University of Washington

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Baeza, R. 1972 Distribucion Geográfica de las Nieblas (Camanchacas) en el Norte de Chile Departamento de Geociencias, Universidad del Norte Antofagasta Unpublished Memoria de TituloGoogle Scholar
Biese, W. 1944–1957 Revision de los moluscos terrestres y de agua dulce provistos de concha de Chile Boletín del Museo Nacional de Historia Natural 22 169–190 I ParteCrossRefGoogle Scholar
Biese, W. 1944–1957 Revision de los moluscos terrestres y de agua dulce provistos de concha de Chile Boletín del Museo Nacional de Historia Natural 23 63–77 II ParteCrossRefGoogle Scholar
Biese, W. 1944–1957 Revision de los moluscos terrestres y de agua dulce provistos de concha de Chile Boletín del Museo Nacional de Historia Natural 24 217–239 III ParteCrossRefGoogle Scholar
Biese, W. 1944–1957 Revision de los moluscos terrestres y de agua dulce provistos de concha de Chile Boletín del Museo Nacional de Historia Natural 25 115–137 IV ParteCrossRefGoogle Scholar
Biese, W. 1944–1957 Revision de los moluscos terrestres y de agua dulce provistos de concha de Chile Anales Museo NacionalSantiago (1957)Google Scholar
Craig, A.K. 1982 Ambiente costero del Norte de Chile Chungará 9 1–12 Google Scholar
Craig, A. K. (in press). Comments on the paleoecology of Cobija. In “Cobija: Proyecto de Investigaciones Interdisciplinarias en la Costa Centro Sur Andina (Chile)” ( Bittmann v.H, B. Ed.), Vol. 2. Universidad del Norte, Antofagasta.Google Scholar
Craig, A.K. Psuty, N. 1968 The Paracas Papers: Studies in Marine Desert Ecology Vol. 1 Department of Geography, Florida Atlantic University No. 2Google Scholar
Follmann, G. 1963 Nordchilenische Nebeloasen Umschau 63 101–104 Google Scholar
Follmann, G. 1967 Die Flectenflora der nordchilenischen Nebeloase Cerro Moreno Nova Hedwigia 14 2–4 215–281 Google Scholar
Herm, D. 1970 Bostryx variabilis n. sp. Mitteilungen der Bayerische Staatssammlung fuer Palaeontologie und Historische Geologie 10 189–198 Google Scholar
Péfaur, J.E. 1982 Dynamics and structure of plant communities in the Lomas of southern Peru Vegetatio 49 163–171 CrossRefGoogle Scholar
Philippi, R.A. 1860 Viaje al Desierto de Atacama Hecho de Orden del Gobierno de Chile en el Verano 1853–1854 Libreria de Eduardo Anton Halle en Sajonia Google Scholar
Robles, F. Alarcon, E. Ulloa, A. 1974 Las Masas de Agua en la Región Norte de Chile y sus Variaciones en un Periodo Frío (1967) Reunión de Trabajo Sobre el Fenómeno de “El Niño, Contribución del Instituto de Fomento Pesquero de Chile, GuayaquilGoogle Scholar
Rundel, P.W. 1978 Ecological relationships of desert fog zone lichens The Bryologist 81 277–293 CrossRefGoogle Scholar
Rundel, P.W. Mahu, M. 1976 Community structure and diversity in a coastal fog desert in northern Chile Florq 165 493–505 CrossRefGoogle Scholar
Tamers, M.A. 1970 Validity of radiocarbon dates on terrestrial snail shells American Antiquity 35 1 94–100 CrossRefGoogle Scholar
Tapia, O. Zuleta, R. 1980 20 Años de Camanchacas y Dos del Proyecto Mejillones Universidad del Norte Antofagasta Google Scholar
Williamson, P.G. 1981 Paleontological documentation of speciation in Cenozoic molluscs from Turkana Basin Nature (London) 293 437–443 CrossRefGoogle Scholar