Ziegler Reservoir, Locality 49, Unit 14: Late/Upper Pleistocene, Colorado
collected 2010-2011

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Insecta - Trichoptera - Limnephilidae
Limnephilidae indet. Kolenati 1848
5 individuals
Asynarchus sp. McLachlan 1880
5 individuals
Insecta - Coleoptera - Staphylinidae
Tachinus fimbriatus Gravenhorst 1802
1 individual
Tachinus angustatus Horn 1877
2 individuals
Tachinus elongatus Gyllenhal 1810
3 individuals
Tachyporus nimbicola Campbell 1979
1 individual
Thanatophilus coloradensis (Wickham 1902)
2 individuals
Oxytelus laqueatus (Marsham 1802)
1 individual
Bledius suturalis LeConte 1863
1 individual
Aleocharinae indet. (Fleming 1821)
2 individuals
Atheta sp. Thomson 1858
2 individuals
Insecta - Coleoptera - Scarabaeidae
Aphodius decipiens Horn 1887
1 individual
recombined as Dialytodius decipiens
Aphodius duplex LeConte 1878
1 individual
recombined as Planolinoides duplex
Aphodius sp. Hellwig 1798
1 individual
Insecta - Coleoptera - Helophoridae
Helophorus eclectus d'Orchymont 1945
1 individual
Insecta - Coleoptera - Elateridae
Elateridae indet. Leach 1815
1 individual
Insecta - Coleoptera - Byrrhidae
Byrrhus eximius Le Conte 1850
1 individual
Insecta - Coleoptera - Curculionidae
Polygraphus rufipennis (Kirby 1837)
2 individuals
Hylastes nigrinus (Mannerheim 1852)
1 individual
Insecta - Coleoptera - Latridiidae
Corticaria sp. Marsham 1802
1 individual
Insecta - Coleoptera - Tetratomidae
Tetratoma concolor Le Conte 1879
1 individual
recombined as Tetratoma (Incolia) concolor
Insecta - Coleoptera - Carabidae
Elaphropus incurvus (Say 1830)
1 individual
recombined as Elaphropus (Barytachys) incurvus
Bembidion sp. Latreille 1802
1 individual
Bembidion breve (Motschulsky 1845)
2 individuals
recombined as Bembidion (Plataphus) breve
Pterostichus sp. Bonelli 1810
1 individual
Insecta - Coleoptera - Dytiscidae
Agabus infuscatus Aubé 1838
2 individuals
recombined as Agabus (Acatodes) infuscatus
Insecta - Hymenoptera - Formicidae
Formica neorufibarbis Emery 1893
1 individual
Branchiopoda - Cladocera
Daphnia sp. Muller 1785
1 individual
see common names

Geography
Country:United States State/province:Colorado County:Pitkin
Coordinates: 39.2° North, 107.0° West (view map)
Paleocoordinates:39.2° North, 107.0° West
Basis of coordinate:estimated from map
Altitude:2705 meters
Geographic resolution:small collection
Time
Period:Quaternary Epoch:Pleistocene
Stage:Late/Upper Pleistocene 10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Pleistocene
Age range of interval:0.12900 - 0.01170 m.y. ago
Age estimate:93 to 87 Ka (other)
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: MIS 5b, dated by OSL.
Lithology and environment
Primary lithology: unlithified peat
Environment:pond Tectonic setting:non-subsiding area
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:chemical
Minimum sieve size:0.300
Reason for describing collection:general faunal/floral analysis
Museum repositories:DMNH
Collection dates:2010-2011
Collection method comments: 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.
Metadata
Database number:169347
Authorizer:M. Clapham Enterer:M. Clapham
Modifier:M. Clapham Research group:paleoentomology
Created:2015-05-19 23:14:39 Last modified:2015-05-22 23:56:08
Access level:the public Released:2015-05-19 23:14:39
Creative Commons license:CC BY
Reference information

Primary reference:
55325. 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]