Ziegler Reservoir, Locality 66, Unit 7 (Pleistocene of the United States)

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 5e, 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 169333: authorized by Matthew Clapham, entered by Matthew Clapham on 19.05.2015

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Hymenoptera - Formicidae
Formica neorufibarbis Emery 1893 ant
 Trichoptera - Limnephilidae
Limnephilidae indet. Kolenati 1848 caddisfly
 Coleoptera - Carabidae
Pterostichus sp. Bonelli 1810 ground beetle
Bembidion sp. Latreille 1802 ground beetle
 Coleoptera - Nitidulidae
Epuraea planulata Erichson 1843 sap beetle
 Coleoptera - Curculionidae
"Tanysphyrus lemnae" = Tanysphyrus (Tanysphyrus) lemnae Fabricius 1792 snout beetle
Scolytus piceae Swaine 1910 bark beetle
Dolurgus pumilus Mannerheim 1843 bark beetle
 Coleoptera - Elateridae
Elateridae indet. Leach 1815 click beetle
 Coleoptera - Buprestidae
Anthaxia prasina Horn 1882 jewel beetle
 Coleoptera - Byrrhidae
Simplocaria tessellata Le Conte 1850 pill beetle
 Coleoptera - Staphylinidae
Lathrobium sp. Gravenhorst 1802 rove beetle
Olophrum sp. Erichson 1839 rove beetle
Olophrum obtectum Erichson 1840 rove beetle
Oxytelus laqueatus Marsham 1802 rove beetle
Stenus sp. Latreille 1796 rove beetle
Thanatophilus coloradensis Wickham 1902 rove beetle
 Coleoptera - Hydrophilidae
Hydrobius fuscipes Linnaeus 1758 water scavenger beetle