Creede (Michigan collection) (Oligocene of the United States)

Where: Colorado (37.8° N, 106.9° W: paleocoordinates 38.8° N, 101.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Creede Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)

• The deposits are dated at 26.26-26.93 Ma (Lanphere 2000; Prothero 2008; Reynolds et al 2000)

Environment/lithology: crater lake; diatomaceous, tuffaceous shale

• "The Creede Formation also consists of lacustrine deposits that were formed by the collapse of the Creede caldera (Larsen and Crossey 1996)."

Size classes: macrofossils, mesofossils

Preservation: mold/impression, adpression

Collected by Allan Caplan

• "Two hundred other Creede insects, sent to me for determination by Professor Case of the University of Michigan, who had previously secured them from Mr. Caplan." Carpenter, 1938

Primary reference: F. M. Carpenter, T. E. Snyder, C. P. Alexander, M. T. James, and F. M. Hull. 1938. Fossil Insects from the Creede Formation, Colorado Part 1. Introduction, Neuroptera, Isoptera and Diptera. Psyche 45:105-119 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 121978: authorized by Matthew Clapham, entered by Jered Karr on 13.12.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Five insect orders have been described from the Creede Formation, with the Coleoptera, Diptera (including Bibionidae) and Hymenoptera being most abundant." D. Smith per. com.
Insecta
 Neuroptera - Chrysopidae
"Palaeochrysa creedei n. sp." = Archaeochrysa creedei
"Palaeochrysa creedei n. sp." = Archaeochrysa creedei Carpenter 1935 green lacewing
MCZ 4316ab; collected by Allan Caplan, 1932 and donated to University of Michigan Museum, later donated to MCZ
 Diptera - Tipulidae
Tipula carpenteri Alexander 1938 crane fly
UMM 15383