Insects from the Upper Miocene Grubstake Formation of Alaska
19 p. : ill., map 26 cm. Includes bibliographical references (p. 17-19). Well-preserved insect wings are reported in weakly consolidated lacustrine shale from the Grubstake Formation, Upper Miocene of Suntrana Creek, central Alaska. ⁴⁰Ar/³⁹Ar dating of an immediately overlying volcanic ash indicates...
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ftamnh:oai:digitallibrary.amnh.org:2246/5920 2024-06-09T07:45:05+00:00 Insects from the Upper Miocene Grubstake Formation of Alaska American Museum novitates, no. 3612 Grimaldi, David A. Triplehorn, D. M. 2008 2898824 bytes application/pdf http://hdl.handle.net/2246/5920 eng en_US eng New York, NY : American Museum of Natural History American Museum novitates, no. 3612 http://hdl.handle.net/2246/5920 QL1 .A436 no.3612 2008 Insects Fossil -- Alaska -- Suntrana Creek Region Paleontology -- Miocene -- Alaska -- Suntrana Creek Region Paleontology -- Alaska -- Suntrana Creek Region Paleoentomology text 2008 ftamnh 2024-05-16T05:58:01Z 19 p. : ill., map 26 cm. Includes bibliographical references (p. 17-19). Well-preserved insect wings are reported in weakly consolidated lacustrine shale from the Grubstake Formation, Upper Miocene of Suntrana Creek, central Alaska. ⁴⁰Ar/³⁹Ar dating of an immediately overlying volcanic ash indicates an age of slightly more than 6.7 ± 0.1 Ma, or approximately one million years before the opening of the Bering land bridge. The insects include four genera and two subfamilies of ants (Hymenoptera, Formicidae, Myrmicinae and Dolichoderinae), a species of Ichneumonidae (Hymenoptera), three genera and families of flies (Diptera: Chironomidae [genus indet.], Bibionidae [Bibio] and Lonchaeidae [Dasiops]), and the elytra of curculionid and carabid beetles. Extant distributions of the flies and possibly the ichneumonid include northerly latitudes around Suntrana. The ants are attributable to the extant genera Dolichoderus or Tapinoma (Dolichoderinae), Solenopsis or Erebomyrma (Myrmicinae), as well as Veromessor and Novomessor (Myrmicinae), indicating extensive biogeographic contraction to more southern latitudes of North America today. These finds are consistent with evidence from a slightly younger deposit from the uppermost Miocene (5.7 Ma) of the Seward Peninsula, Alaska. Implications are discussed regarding the differential effects of climate change and land bridges on the dispersal of various insect taxa. Text Bering Land Bridge Seward Peninsula Alaska American Museum of Natural History: AMNH scientific publications |
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American Museum of Natural History: AMNH scientific publications |
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language |
English |
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QL1 .A436 no.3612 2008 Insects Fossil -- Alaska -- Suntrana Creek Region Paleontology -- Miocene -- Alaska -- Suntrana Creek Region Paleontology -- Alaska -- Suntrana Creek Region Paleoentomology |
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QL1 .A436 no.3612 2008 Insects Fossil -- Alaska -- Suntrana Creek Region Paleontology -- Miocene -- Alaska -- Suntrana Creek Region Paleontology -- Alaska -- Suntrana Creek Region Paleoentomology Grimaldi, David A. Triplehorn, D. M. Insects from the Upper Miocene Grubstake Formation of Alaska |
topic_facet |
QL1 .A436 no.3612 2008 Insects Fossil -- Alaska -- Suntrana Creek Region Paleontology -- Miocene -- Alaska -- Suntrana Creek Region Paleontology -- Alaska -- Suntrana Creek Region Paleoentomology |
description |
19 p. : ill., map 26 cm. Includes bibliographical references (p. 17-19). Well-preserved insect wings are reported in weakly consolidated lacustrine shale from the Grubstake Formation, Upper Miocene of Suntrana Creek, central Alaska. ⁴⁰Ar/³⁹Ar dating of an immediately overlying volcanic ash indicates an age of slightly more than 6.7 ± 0.1 Ma, or approximately one million years before the opening of the Bering land bridge. The insects include four genera and two subfamilies of ants (Hymenoptera, Formicidae, Myrmicinae and Dolichoderinae), a species of Ichneumonidae (Hymenoptera), three genera and families of flies (Diptera: Chironomidae [genus indet.], Bibionidae [Bibio] and Lonchaeidae [Dasiops]), and the elytra of curculionid and carabid beetles. Extant distributions of the flies and possibly the ichneumonid include northerly latitudes around Suntrana. The ants are attributable to the extant genera Dolichoderus or Tapinoma (Dolichoderinae), Solenopsis or Erebomyrma (Myrmicinae), as well as Veromessor and Novomessor (Myrmicinae), indicating extensive biogeographic contraction to more southern latitudes of North America today. These finds are consistent with evidence from a slightly younger deposit from the uppermost Miocene (5.7 Ma) of the Seward Peninsula, Alaska. Implications are discussed regarding the differential effects of climate change and land bridges on the dispersal of various insect taxa. |
format |
Text |
author |
Grimaldi, David A. Triplehorn, D. M. |
author_facet |
Grimaldi, David A. Triplehorn, D. M. |
author_sort |
Grimaldi, David A. |
title |
Insects from the Upper Miocene Grubstake Formation of Alaska |
title_short |
Insects from the Upper Miocene Grubstake Formation of Alaska |
title_full |
Insects from the Upper Miocene Grubstake Formation of Alaska |
title_fullStr |
Insects from the Upper Miocene Grubstake Formation of Alaska |
title_full_unstemmed |
Insects from the Upper Miocene Grubstake Formation of Alaska |
title_sort |
insects from the upper miocene grubstake formation of alaska |
publisher |
New York, NY : American Museum of Natural History |
publishDate |
2008 |
url |
http://hdl.handle.net/2246/5920 |
genre |
Bering Land Bridge Seward Peninsula Alaska |
genre_facet |
Bering Land Bridge Seward Peninsula Alaska |
op_relation |
American Museum novitates, no. 3612 http://hdl.handle.net/2246/5920 |
_version_ |
1801373998929412096 |