Where: Pitkin County, Colorado (39.2° N, 107.0° W: paleocoordinates 39.2° N, 107.0° W)
• coordinate estimated from map
• small collection-level geographic resolution
When: Late/Upper Pleistocene (0.1 - 0.0 Ma)
• MIS 5b, dated by OSL.
• bed-level stratigraphic resolution
Environment/lithology: pond; unlithified peat
Size class: macrofossils
Collected in 2010-2011; reposited in the DMNH
Collection methods: chemical
• Boiled in a dilute solution of sodiumhexametaphosphate, a dispersant. Most samples disaggregated in this procedure, but a few contained highly felted peats that were subsequently treated in cold, 7% KOH solution to aid disaggregation. The organic fraction of each sample was then wet sieved on a 300 μm screen, and insect fossils were isolated from plant residues by the kerosene flotation method.
Primary reference: S. A. Elias. 2014. Environmental interpretation of fossil insect assemblages from MIS 5 at Ziegler Reservoir, Snowmass Village, Colorado. Quaternary Research 82:592-603 [M. Clapham/M. Clapham]more details
Purpose of describing collection: general faunal/floral analysis
PaleoDB collection 169347: authorized by Matthew Clapham, entered by Matthew Clapham on 19.05.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Branchiopoda | |
Daphnia sp. Muller 1785 water flea | |
Insecta | |
Formica neorufibarbis Emery 1893 ant | |
Limnephilidae indet. Kolenati 1848 caddisfly
Asynarchus sp. McLachlan 1880 caddisfly | |
Corticaria sp. Marsham 1802 minute brown scavenger beetle | |
Polygraphus rufipennis Kirby 1837 bark beetle
Hylastes nigrinus Mannerheim 1852 bark beetle | |
"Tetratoma concolor" = Tetratoma (Incolia) concolor
"Tetratoma concolor" = Tetratoma (Incolia) concolor Le Conte 1879 polypore fungus beetle | |
Elateridae indet. Leach 1815 click beetle | |
Byrrhus eximius Le Conte 1850 pill beetle | |
Thanatophilus coloradensis, Aleocharinae indet., Atheta sp., Oxytelus laqueatus, Bledius suturalis, Tachyporus nimbicola, Tachinus angustatus, Tachinus elongatus, Tachinus fimbriatus
Thanatophilus coloradensis Wickham 1902 rove beetle
Aleocharinae indet. Fleming 1821 rove beetle
Atheta sp. Thomson 1858 rove beetle
Oxytelus laqueatus Marsham 1802 rove beetle
Bledius suturalis LeConte 1863 rove beetle
Tachyporus nimbicola Campbell 1979 rove beetle
Tachinus angustatus Horn 1877 rove beetle
Tachinus elongatus Gyllenhal 1810 rove beetle
Tachinus fimbriatus Gravenhorst 1802 rove beetle | |
Aphodius sp., "Aphodius duplex" = Planolinoides duplex, "Aphodius decipiens" = Dialytodius decipiens
Aphodius sp. Hellwig 1798 scarab beetle
"Aphodius duplex" = Planolinoides duplex LeConte 1878 scarab beetle
"Aphodius decipiens" = Dialytodius decipiens Horn 1887 scarab beetle | |
Helophorus eclectus d'Orchymont 1945 water scavenger beetle | |
"Agabus infuscatus" = Agabus (Acatodes) infuscatus
"Agabus infuscatus" = Agabus (Acatodes) infuscatus Aubé 1838 predaceous diving beetle | |
Bembidion sp., "Bembidion breve" = Bembidion (Plataphus) breve, "Elaphropus incurvus" = Elaphropus (Barytachys) incurvus, Pterostichus sp.
Bembidion sp. Latreille 1802 ground beetle
"Bembidion breve" = Bembidion (Plataphus) breve Motschulsky 1845 ground beetle
"Elaphropus incurvus" = Elaphropus (Barytachys) incurvus Say 1830 ground beetle
Pterostichus sp. Bonelli 1810 ground beetle |