A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization?
An engraving made by a scolytid bark beetle, assigned to the genus Dendroctonus of the tribe Tomicini, has been identified on a mummified, middle Eocene (45 Ma) specimen of Larix altoborealis wood from the Canadian High Arctic. Larix altoborealis is the earliest known species of Larix , a distinctiv...
Published in: | American Journal of Botany |
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Online Access: | http://dx.doi.org/10.2307/3558429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F3558429 https://onlinelibrary.wiley.com/doi/pdf/10.2307/3558429 https://onlinelibrary.wiley.com/doi/full-xml/10.2307/3558429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F3558429 |
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crwiley:10.2307/3558429 2024-09-09T19:26:48+00:00 A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? Labandeira, Conrad C. LePage, Ben A. Johnson, Arthur H. National Museum of Natural History 2001 http://dx.doi.org/10.2307/3558429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F3558429 https://onlinelibrary.wiley.com/doi/pdf/10.2307/3558429 https://onlinelibrary.wiley.com/doi/full-xml/10.2307/3558429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F3558429 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor American Journal of Botany volume 88, issue 11, page 2026-2039 ISSN 0002-9122 1537-2197 journal-article 2001 crwiley https://doi.org/10.2307/3558429 2024-08-01T04:21:30Z An engraving made by a scolytid bark beetle, assigned to the genus Dendroctonus of the tribe Tomicini, has been identified on a mummified, middle Eocene (45 Ma) specimen of Larix altoborealis wood from the Canadian High Arctic. Larix altoborealis is the earliest known species of Larix , a distinctive lineage of pinaceous conifers that is taxonomically identifiable by the middle Eocene and achieved a broad continental distribution in northern North America and Eurasia during the late Cenozoic. Dendroctonus currently consists of three highly host‐specific lineages that have pinaceous hosts: a basal monospecific clade on Pinoideae ( Pinus ) and two sister clades that consist of a speciose clade associated exclusively with Pinoideae and six species that breed overwhelmingly in Piceoideae ( Picea ) and Laricoideae ( Pseudotsuga and Larix ). The middle Eocene engraving in L. altoborealis represents an early member of Dendroctonus that is ancestral to other congeneric species that colonized a short‐bracted species of Larix. This fossil occurrence, buttressed by recent data on the phylogeny of Pinaceae subfamilies and Dendroctonus species, indicates that there was phylogenetically congruent colonization by these bark‐beetle lineages of a Pinoideae + (Piceoideae + Laricoideae) host‐plant sequence. Based on all available evidence, an hypothesis of a geochronologically early invasion during the Early Cretaceous is supported over an alternative view of late Cenozoic cladogenesis by bark beetles onto the Pinaceae. These data also suggest that host‐plant chemistry may be an effective species barrier to colonization by some bark‐beetle taxa over geologically long time scales. Article in Journal/Newspaper Arctic Wiley Online Library Arctic American Journal of Botany 88 11 2026 2039 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
An engraving made by a scolytid bark beetle, assigned to the genus Dendroctonus of the tribe Tomicini, has been identified on a mummified, middle Eocene (45 Ma) specimen of Larix altoborealis wood from the Canadian High Arctic. Larix altoborealis is the earliest known species of Larix , a distinctive lineage of pinaceous conifers that is taxonomically identifiable by the middle Eocene and achieved a broad continental distribution in northern North America and Eurasia during the late Cenozoic. Dendroctonus currently consists of three highly host‐specific lineages that have pinaceous hosts: a basal monospecific clade on Pinoideae ( Pinus ) and two sister clades that consist of a speciose clade associated exclusively with Pinoideae and six species that breed overwhelmingly in Piceoideae ( Picea ) and Laricoideae ( Pseudotsuga and Larix ). The middle Eocene engraving in L. altoborealis represents an early member of Dendroctonus that is ancestral to other congeneric species that colonized a short‐bracted species of Larix. This fossil occurrence, buttressed by recent data on the phylogeny of Pinaceae subfamilies and Dendroctonus species, indicates that there was phylogenetically congruent colonization by these bark‐beetle lineages of a Pinoideae + (Piceoideae + Laricoideae) host‐plant sequence. Based on all available evidence, an hypothesis of a geochronologically early invasion during the Early Cretaceous is supported over an alternative view of late Cenozoic cladogenesis by bark beetles onto the Pinaceae. These data also suggest that host‐plant chemistry may be an effective species barrier to colonization by some bark‐beetle taxa over geologically long time scales. |
author2 |
National Museum of Natural History |
format |
Article in Journal/Newspaper |
author |
Labandeira, Conrad C. LePage, Ben A. Johnson, Arthur H. |
spellingShingle |
Labandeira, Conrad C. LePage, Ben A. Johnson, Arthur H. A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
author_facet |
Labandeira, Conrad C. LePage, Ben A. Johnson, Arthur H. |
author_sort |
Labandeira, Conrad C. |
title |
A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
title_short |
A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
title_full |
A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
title_fullStr |
A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
title_full_unstemmed |
A Dendroctonus bark engraving (Coleoptera: Scolytidae) from a middle Eocene Larix (Coniferales: Pinaceae): early or delayed colonization? |
title_sort |
dendroctonus bark engraving (coleoptera: scolytidae) from a middle eocene larix (coniferales: pinaceae): early or delayed colonization? |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.2307/3558429 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.2307%2F3558429 https://onlinelibrary.wiley.com/doi/pdf/10.2307/3558429 https://onlinelibrary.wiley.com/doi/full-xml/10.2307/3558429 http://api.wiley.com/onlinelibrary/chorus/v1/articles/10.2307%2F3558429 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
American Journal of Botany volume 88, issue 11, page 2026-2039 ISSN 0002-9122 1537-2197 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.2307/3558429 |
container_title |
American Journal of Botany |
container_volume |
88 |
container_issue |
11 |
container_start_page |
2026 |
op_container_end_page |
2039 |
_version_ |
1809896345885999104 |