THE EOCENE APEX OF PANORPOID SCORPIONFLY FAMILY DIVERSITY

被引：28
作者：
Archibald, S. Bruce [1 ,2 ,3 ]
Mathewes, Rolf W. [1 ]
Greenwood, David R. [4 ]
机构：
[1] Simon Fraser Univ, Dept Biol Sci, Burnaby, BC V5A 1S6, Canada
[2] Harvard Univ, Museum Comparat Zool, Cambridge, MA 02138 USA
[3] Royal BC Museum, Victoria, BC, Canada
[4] Brandon Univ, Dept Biol, Brandon, MB R7A 6A9, Canada
来源：
JOURNAL OF PALEONTOLOGY | 2013年 / 87卷 / 04期
基金：
加拿大自然科学与工程研究理事会;
关键词：
PLANT-INSECT ASSOCIATIONS; HIGHLANDS BRITISH-COLUMBIA; OKANAGAN HIGHLANDS; PANORPIDAE MECOPTERA; WASHINGTON-STATE; CANADA; PALEOCENE; PATAGONIA; EXTINCTION; ARGENTINA;
D O I：
10.1666/12-129
中图分类号：
Q91 [古生物学];
学科分类号：
0709 ; 070903 ;
摘要：
The scorpionfly (Mecoptera) superfamily Panorpoidea underwent an Eocene radiation, replacing the extinct Mesozoic orthophlebiid grade and reaching its greatest family-level diversity: Panorpidae, Panorpodidae, Austropanorpidae, Holcorpidae, Dinopanorpidae, and a new family proposed here, the Eorpidae. Only the Panorpidae and Panorpodidae survived the Eocene and persist to the present day. This cluster of family extinctions is exceptional within Cenozoic insects. The Eorpidae includes at least one new genus and three new species described here from four localities of the early Eocene Okanagan Highlands of British Columbia, Canada, and Washington, U.S.A.: Eorpa ypsipeda n. gen. n. sp. (McAbee and possibly Falkland, BC, Canada; and Republic, WA, U.S.A.), Eorpa elverumi n. gen. n. sp. (Republic), and Eorpa jurgeni n. gen. n. sp. (Quilchena, BC). Some of the other fragmentary and poorly preserved specimens might represent further new species. We propose that the apex of Panorpoid family diversity ended by pressures from post-Eocene icehouse world climatic stress and the rise to ecological dominance of ants, some of which would have provided strong competition in scavenging for dead arthropods.
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收藏
页码：677 / 695
页数：19
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