Tasch Nobel V, Bed 7 (Permian of the United States)

Also known as Midco Locality 23, Asthenohymen-Delopterum bed

Where: Oklahoma (36.3° N, 97.3° W: paleocoordinates 1.6° N, 27.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

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

• 0.52 feet thick, 8.42 feet above classic Midco Insect Bed of Raasch

• bed-level stratigraphic resolution

Environment/lithology: lacustrine; lithified, argillaceous limestone

• Playa lake, evaporative salt lake setting
• Evaporitic hard argillaceous limestone, containing halite casts

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Primary reference: P. Tasch and J. R. Zimmerman. 1962. The Asthenohymen-Delopterum Bed, A New Leonardian Insect Horizon in the Wellington of Kansas and Oklahoma. Journal of Paleontology 36(6):1319-1333 [C. Labandeira/C. Labandeira/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 104826: authorized by Matthew Clapham, entered by Matthew Clapham on 10.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Insecta
 Reculida - Sylvaphlebiidae
Phenopterum elongatum Sellards 1909 winged insect
 Grylloblattodea - Probnidae
Probnis speciosa Sellards 1909 ice crawler
 Grylloblattodea - Liomopteridae
Liomopterum ornatum Sellards 1909 ice crawler
 Grylloblattodea - Lemmatophoridae
Lisca minuta Sellards 1909 ice crawler
Artinska ? clara Sellards 1909 ice crawler
Lemmatophora typa Sellards 1909 ice crawler
 Caloneurodea -
"Apsidoneura reducta n. sp." = Paleuthygramma acuta
"Apsidoneura reducta n. sp." = Paleuthygramma acuta Carpenter 1943 winged insect
 Dicondylia - Spiloblattinidae
Permoblattina curta Sellards 1908 winged insect
 Dicondylia - Phyloblattidae
"Pycnoblattina curvata" = Phyloblatta curvata
"Pycnoblattina curvata" = Phyloblatta curvata Sellards 1908 winged insect
 Coleoptera - Tshekardocoleidae
Permocoleus wellingtonensis n. gen. n. sp. Lubkin and Engel 2005 beetle
 Protoneuroptera - Permoberothidae
Permoberotha ? villosa Tillyard 1932 winged insect
 Miomoptera - Palaeomanteidae
Delopterum minutum, "Delopterum elongatum" = Delopsocus elongatus, "Delopterum latum" = Delopsocus latus
Delopterum minutum Sellards 1909 winged insect
"Delopterum elongatum" = Delopsocus elongatus Sellards 1909 winged insect
"Delopterum latum" = Delopsocus latus Sellards 1909 winged insect
 Permopsocida - Psocidiidae
Dichentomum tinctum Tillyard 1926 winged insect
 Hemiptera - Archescytinidae
Permopsylla ? americana Tillyard 1926 true bug
Parapermopsylla tricubita n. gen. n. sp. Zimmerman 1962 true bug
 Megasecoptera - Protohymenidae
Protohymen readi Carpenter 1933 winged insect
Protohymen bifurcatus n. sp. Zimmerman 1962 winged insect
 Diaphanopterodea - Asthenohymenidae
Asthenohymen minutus n. sp. Zimmerman 1962 winged insect
 Ephemerida - Protereismatidae
Protereisma latum Sellards 1907 mayfly
 Dicondylia - Kennedyidae
Kennedya sp. Tillyard 1925 winged insect