Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia
Digitizing the third upper molars of Microtus pennsylvanicus reveals evolutionary change in some traits but stability in others during the last 30,000 years. Fossils from Strait Canyon, Virginia (radiocarbon dated between 29,870 + 1,800/-1,400 and 17,880 ± 150 yr B.P.) were compared with modern samp...
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Cambridge University Press (CUP)
1990
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Online Access: | http://dx.doi.org/10.1017/s0094837300010071 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010071 |
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crcambridgeupr:10.1017/s0094837300010071 2024-03-03T08:45:14+00:00 Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia Barnosky, Anthony D. 1990 http://dx.doi.org/10.1017/s0094837300010071 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010071 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Paleobiology volume 16, issue 3, page 370-383 ISSN 0094-8373 1938-5331 Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics journal-article 1990 crcambridgeupr https://doi.org/10.1017/s0094837300010071 2024-02-08T08:40:06Z Digitizing the third upper molars of Microtus pennsylvanicus reveals evolutionary change in some traits but stability in others during the last 30,000 years. Fossils from Strait Canyon, Virginia (radiocarbon dated between 29,870 + 1,800/-1,400 and 17,880 ± 150 yr B.P.) were compared with modern samples from the margin of the species' conterminous geographic range: Virginia, Colorado, Alaska, and Hudson Bay. Since the late Pleistocene a modification from narrow to wide teeth took place in the eastern populations but not in the western ones, and populations in Virginia apparently evolved wider confluence between triangles 1 and 2. Traits that remained stable through time in the Virginia area, but not necessarily elsewhere, include the numerical shape factors of the occlusal surface and the posterior loop. Potentially widespread stability is evident in the perimeter of the posterior loop relative to total tooth perimeter. Tooth length forms a geographic cline, in which both the fossil and modern populations from Virginia occupy the same position. A peripheral population from southern Colorado shows the most derived dental morphology. These morphological relationships suggest that mosaic evolution operates in arvicoline lineages and provide testable paradigms for future studies. Article in Journal/Newspaper Hudson Bay Alaska Cambridge University Press Hudson Hudson Bay Paleobiology 16 3 370 383 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics Barnosky, Anthony D. Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
topic_facet |
Paleontology General Agricultural and Biological Sciences Ecology Ecology, Evolution, Behavior and Systematics |
description |
Digitizing the third upper molars of Microtus pennsylvanicus reveals evolutionary change in some traits but stability in others during the last 30,000 years. Fossils from Strait Canyon, Virginia (radiocarbon dated between 29,870 + 1,800/-1,400 and 17,880 ± 150 yr B.P.) were compared with modern samples from the margin of the species' conterminous geographic range: Virginia, Colorado, Alaska, and Hudson Bay. Since the late Pleistocene a modification from narrow to wide teeth took place in the eastern populations but not in the western ones, and populations in Virginia apparently evolved wider confluence between triangles 1 and 2. Traits that remained stable through time in the Virginia area, but not necessarily elsewhere, include the numerical shape factors of the occlusal surface and the posterior loop. Potentially widespread stability is evident in the perimeter of the posterior loop relative to total tooth perimeter. Tooth length forms a geographic cline, in which both the fossil and modern populations from Virginia occupy the same position. A peripheral population from southern Colorado shows the most derived dental morphology. These morphological relationships suggest that mosaic evolution operates in arvicoline lineages and provide testable paradigms for future studies. |
format |
Article in Journal/Newspaper |
author |
Barnosky, Anthony D. |
author_facet |
Barnosky, Anthony D. |
author_sort |
Barnosky, Anthony D. |
title |
Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
title_short |
Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
title_full |
Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
title_fullStr |
Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
title_full_unstemmed |
Evolution of dental traits since latest Pleistocene in meadow voles ( Microtus pennsylvanicus ) from Virginia |
title_sort |
evolution of dental traits since latest pleistocene in meadow voles ( microtus pennsylvanicus ) from virginia |
publisher |
Cambridge University Press (CUP) |
publishDate |
1990 |
url |
http://dx.doi.org/10.1017/s0094837300010071 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0094837300010071 |
geographic |
Hudson Hudson Bay |
geographic_facet |
Hudson Hudson Bay |
genre |
Hudson Bay Alaska |
genre_facet |
Hudson Bay Alaska |
op_source |
Paleobiology volume 16, issue 3, page 370-383 ISSN 0094-8373 1938-5331 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0094837300010071 |
container_title |
Paleobiology |
container_volume |
16 |
container_issue |
3 |
container_start_page |
370 |
op_container_end_page |
383 |
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1792500760075829248 |