Midco Locality 3 (MCZ Collection) (Permian of the United States)

Also known as Site IIA of Tasch and Zimmerman 1962; Midco Insect Bed

Where: Noble County, Oklahoma (36.5° N, 97.3° W: paleocoordinates 1.8° N, 27.0° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Midco Member (Wellington Formation), Artinskian (290.1 - 279.3 Ma)

• "Lower Permian... Leonardian" or "Artinskian" (Beckemeyer)

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; lithified, dolomitic, argillaceous limestone

• Salty playa lake. The lower layer shows sedimentational and organic features which suggest that it was laid down close to the shore and that most of its biota was washed into the lake. The matrix and biota of the middle layer, which is highly irregular and characterized by pink partings, were probably transported to the water by violent dust storms. The upper layer is highly argillaceous, and was deposited under strongly saline conditions; insects are rare but they are very well preserved.

Size class: macrofossils

Preservation: adpression

Reposited in the MCZ

Collection methods: quarrying

• "Station 3, Unit 11 of Raasch (1946), Site IIA of Tasch and ZImmerman (1962)... in a hillside cut on privately owned land that is currently used as a county road materials quarry" (Beckemeyer)

Primary reference: F. M. Carpenter. 1947. Lower Permian Insects from Oklahoma. Part 1. Introduction and the Orders Megasecoptera, Protodonata, and Odonata. Proceedings of the American Academy of Arts and Sciences 76:25-54 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 104889: authorized by John Alroy, entered by John Alroy on 11.02.2011, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Dicondylia - Kennedyidae
Kennedya fraseri n. sp. Carpenter 1947 winged insect
 Megasecoptera - Bardohymenidae
Sylvohymen ingens n. sp. Carpenter 1947 winged insect