Midco unkown locality (Permian of the United States)

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

Primary reference: O. Béthoux and R. J. Beckemeyer. 2007. New and rare insect species from the Wellington Formation (Orthoptera, Grylloblattodea; Lower Permian, USA). Alavesia 1:49-61 [M. Clapham/J. Karr]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 107405: authorized by Matthew Clapham, entered by Jered Karr on 07.04.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Mecoptera - Permopanorpidae
Permopanorpa inaequalis1
Permopanorpa inaequalis1 Tillyard 1926 scorpionfly
B3-4-21-04-009 ab; collected by Joseph Hall in 2004
 Grylloblattodea - Liomopteridae
Midcopterum evidens n. gen. n. sp.
Midcopterum evidens n. gen. n. sp. Béthoux and Beckemeyer 2007 ice crawler
MCZ 10183
 Orthoptera - Oedischiidae
Pseudoiasvia sinuosa n. gen. n. sp.
Pseudoiasvia sinuosa n. gen. n. sp. Béthoux and Beckemeyer 2007 grasshopper
MCZ 10194
 Caloneurodea - Caloneuridae
Ligogramma sinuosa n. gen. n. sp.2, Anomalogramma parva2
Ligogramma sinuosa n. gen. n. sp.2 Béthoux et al. 2004 winged insect
MCZ 10186
Anomalogramma parva2 Carpenter 1943 winged insect
MCZ 10046
 Caloneurodea - Apsidoneuridae
Apsidoneura flexa2
Apsidoneura flexa2 Carpenter 1943 winged insect
MCZ 10046
 Caloneurodea -
Paleuthygramma acuta2, Gigagramma carpenteri n. gen. n. sp.2
Paleuthygramma acuta2 Carpenter 1943 winged insect
MCZ 10044, 10187, 10189
Gigagramma carpenteri n. gen. n. sp.2 Béthoux et al. 2004 winged insect
MCZ 10182
 Ephemerida - Protereismatidae
Protereisma sp.3, Protereisma cf. arcuatum3
Protereisma sp.3 Sellards 1907 mayfly
Protereisma cf. arcuatum3 Sellards 1907 mayfly
MCZ 5185 ab
1Beckemeyer and Hall 2007; 2Béthoux et al. 2004; 3Carpenter 1979