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)
• Early MIS 5a, 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 169350: authorized by Matthew Clapham, entered by Matthew Clapham on 19.05.2015
Creative Commons license: CC BY (attribution)
Taxonomic list
Insecta | |
| |
Myrmica lobifrons Pergande 1900 ant | |
Bembidion sp., "Bembidion breve" = Bembidion (Plataphus) breve
Bembidion sp. Latreille 1802 ground beetle
"Bembidion breve" = Bembidion (Plataphus) breve Motschulsky 1845 ground beetle | |
"Agabus infuscatus" = Agabus (Acatodes) infuscatus
"Agabus infuscatus" = Agabus (Acatodes) infuscatus Aubé 1838 predaceous diving beetle | |
Enochrus sp. Thomson 1859 water scavenger beetle | |
Helophorus auricollis Eschscholtz 1822 water scavenger beetle | |
Aphodius spp. Hellwig 1798 scarab beetle | |
Sonoma margemina, Lathrobium sp., Eucnecosum brunnescens, Eucnecosum brachypterum, Eucnecosum tenue, Olophrum obtectum, Olophrum boreale, Stenus sp., "Tachinus schwartzi" = Tachinus schwarzi
Sonoma margemina Park and Wagner 1961 rove beetle
Lathrobium sp. Gravenhorst 1802 rove beetle
Eucnecosum brunnescens Sahlberg 1871 rove beetle
Eucnecosum brachypterum Gravenhorst 1802 rove beetle
Eucnecosum tenue LeConte 1863 rove beetle
Olophrum obtectum Erichson 1840 rove beetle
Olophrum boreale Paykull 1792 rove beetle
Stenus sp. Latreille 1796 rove beetle
"Tachinus schwartzi" = Tachinus schwarzi Horn 1877 rove beetle | |
Trogoxylon parallelopipedum Melsheimer 1846 false powderpost beetle | |
Phloeosinus scopulorum Swain 1924 bark beetle
Hylastes nigrinus Mannerheim 1852 bark beetle
Magdalis lecontei Horn 1873 snout beetle | |
Plateumaris pusilla Say 1827 reed leaf beetle
Plateumaris flavipes Kirby 1837 reed leaf beetle
Donacia sp. Fabricius 1775 leaf beetle | |
Limnephilidae indet. Kolenati 1848 caddisfly
Asynarchus sp. McLachlan 1880 caddisfly |