Pit 11, Braidwood, Mazon Creek (FMNH coll) (Carboniferous of the United States)

Where: Illinois (41.2° N, 88.2° W: paleocoordinates 4.8° S, 23.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Francis Creek Shale Member (Carbondale Formation), Westphalian D (309.8 - 307.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: deltaic; lithified, concretionary, ferruginous mudstone

• Illinois basin
• ironstone concretions

Size class: macrofossils

Preservation: mold/impression, concretion

Reposited in the FMNH

Primary reference: F. M. Carpenter and E. S. Richardson. 1978. Structure and Relationships of the Upper Carboniferous Insect, Prochoroptera calopteryx (Diaphanopterodea, Prochoropteridae). Psyche 85:219-227 [C. Labandeira/C. Labandeira/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 122493: authorized by Matthew Clapham, entered by Matthew Clapham on 31.12.2011, edited by Bryan Gee

Creative Commons license: CC BY (attribution)

Taxonomic list

Archisymplectes rhothon
  -
Archisymplectes rhothon n. gen. n. sp.10
Archisymplectes rhothon n. gen. n. sp.10 Schram 1973
FMNH PE12670, 12669, 21552
Amphibia
 Temnospondyli - Amphibamidae
Amphibamus grandiceps9 Cope 1865 tetrapod
FMNH PR558, 664
 Cyclostomi -
Squirmarius testai n. gen. n. sp.8
Squirmarius testai n. gen. n. sp.8 McCoy et al. 2023
FMNH PF 17809, 17810, 17811, 17812
Enoplea
 Chromadorida - Nemavermidae
"Nemavermes mackeei n. gen. n. sp." = Tullimonstrum gregarium10
"Nemavermes mackeei n. gen. n. sp." = Tullimonstrum gregarium10 Richardson 1966
FMNH PE21551
Priapulidae
  - Priapulidae
Priapulites konecniorum n. gen. n. sp.10
Priapulites konecniorum n. gen. n. sp.10 Schram 1973
FMNH PE21555, 21412
Arachnida
 Ricinulei - Poliocheridae
Poliochera gibbsi n. sp.11 Selden 1992 hooded tickspider
FMNH PE29176 (ex. Tom Gibbs coll)
 Scorpiones - Eoctonidae
Eoctonus miniatus6 Petrunkevitch 1913 scorpion
FMNH PE 32202
 Scorpiones - Mazoniidae
Mazonia woodiana6 Meek and Worthen 1868 scorpion
FMNH PE 39253 (Taelle coll.)
Myriapoda
 Chilognatha - Hexecontasomatidae
Hexecontasoma carinatum n. gen. n. sp.4
Hexecontasoma carinatum n. gen. n. sp.4 Hannibal 2000 millipede
FMNH PE 23487, 13656
Insecta
 Palaeodictyoptera - Eubleptidae
Eubleptus danielsi1 Handlirsch 1906 winged insect
FMNH PE32045-6 (Herdina), FMNH PE22016 (Dwayne Stone)
 Diaphanopterodea - Prochoropteridae
Prochoroptera calopteryx Handlirsch 1911 winged insect
FMNH PE25667 (JJF-IL-007)
 Dicondylia - Srokalarvidae
Srokalarva berthei n. gen. n. sp.5
Srokalarva berthei n. gen. n. sp.5 Haug et al. 2016 winged insect
FMNH MCP-322
 Protorthoptera - Eucaenidae
Eucaenus ovalis3 Scudder 1885 winged insect
FMNH PE 20790
 Dicondylia - Syntonopteridae
Syntonoptera schucherti2 Handlirsch 1911 winged insect
FMNH PE16216 (ex. Ida Thompson, 1928)
Paucijaculum samamithion
  -
Paucijaculum samamithion n. gen. n. sp.10
Paucijaculum samamithion n. gen. n. sp.10 Schram 1973
FMH PE11640, 12835
Cephalopoda
 Coleoidea -
Pohlsepia mazonensis n. gen. n. sp.7
Pohlsepia mazonensis n. gen. n. sp.7 Kluessendorf and Doyle 2003
FMNH PE51727