Research Library | Digital Repository

Biological inclusions in amber from the Paleogene Chickaloon Formation of Alaska. (American Museum novitates, no. 3908)

Show simple item record Grimaldi, David A. Sunderlin, David. Aaroe, Georgene A. Dempsky, Michelle R. Parker, Nancy E. Tillery, George Q. White, Jaclyn G. Barden, Phillip. Nascimbene, Paul C. Williams, Christopher J. (Christopher James), 1970- 2018-09-26T20:39:35Z 2018-09-26T20:39:35Z 2018-09-28
dc.description 37 pages : illustrations (some color), color maps ; 26 cm. en_US
dc.description.abstract The Chickaloon Formation in south-central Alaska contains rich coal deposits dated very close to the Paleocene-Eocene boundary, immediately beneath which occur dispersed nodules of amber along with abundant remains of Metasequoia, dicots, and monocots. The nodules are small (less than 10 mm in length), nearly 10,000 of which were screened, yielding several inclusions of fungi and plant fragments, but mostly terrestrial arthropods: 29 specimens in 10 orders and 13 families. The fungi include resinicolous hyphae and a dark, multiseptate hyphomycete. Plants include wood/bark fragments and fibers, and the microphylls of a bryophyte (probably a moss, Musci). Among the arthropods are arachnids: mites (Acari: Oribatida), Pseudoscorpionida, and the bodies and a silken cocoon of spiders (Araneae). Insecta include Blattodea, Thysanoptera, Hemiptera (Heteroptera and Aphidoidea), Coleoptera (Dermestidae: Megatominae), Trichoptera, Diptera (Chironomidae: Tanypodinae), and Hymenoptera (Formicidae: Formicinae). Nymphal aphids predominate (65% of the arthropod individuals), which were probably feeding on the source tree, likely Metasequoia. There is a bias in preservation toward small arthropods (mean body length 0.75 mm) that are surface-dwelling (nonwinged) stages and taxa. Chickaloon amber contains the most northerly fossil records of pseudoscorpions, thrips, Dermestidae, and Cenozoic ants and mites, so the deposit is contributing unique data on high-latitude paleodiversity of the Paleogene hothouse earth. en_US
dc.language.iso en_US en_US
dc.publisher American Museum of Natural History. en_US
dc.relation.ispartofseries American Museum novitates;no.3908.
dc.subject Amber fossils. en_US
dc.subject Paleontology -- Paleogene. en_US
dc.subject Paleoentomology -- Paleogene. en_US
dc.subject Paleobiogeography -- Cenozoic. en_US
dc.subject Sutton Region (Alaska) en_US
dc.subject Chickaloon Formation (Alaska) en_US
dc.subject Alaska. en_US
dc.title Biological inclusions in amber from the Paleogene Chickaloon Formation of Alaska. (American Museum novitates, no. 3908) en_US
dc.title.alternative Paleogene biological inclusions in amber. en_US

Files in this item

This item appears in the following Collection(s)

  • American Museum Novitates
    Novitates (Latin for "new acquaintances"), published continuously and numbered consecutively since 1921, are short papers that contain descriptions of new forms and reports in zoology, paleontology, and geology. New numbers are published at irregular intervals.

Show simple item record

Search Entire Repository

Advanced Search


My Account