PBDB Collection

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

Where: Illinois (41.2° N, 88.2° W)

• Paleocoordinates: 5.1° S, 23.4° W (Wright 2013)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Francis Creek Shale Member (Carbondale Formation), Westphalian D (309.8 - 307.4 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, Joseph Flannery-Sutherland and Phil Novack-Gottshall

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names

Cephalopoda
Coleoidea -	Pohlsepia mazonensis n. gen. n. sp.⁸ Pohlsepia mazonensis n. gen. n. sp.⁸ Kluessendorf and Doyle 2003 FMNH PE51727
Paucijaculum samamithion
-	Paucijaculum samamithion n. gen. n. sp.¹² Paucijaculum samamithion n. gen. n. sp.¹² Schram 1973 FMH PE11640, 12835
Arachnida
Scorpiones - Eoctonidae	Eoctonus miniatus⁷ Eoctonus miniatus⁷ Petrunkevitch 1913 scorpion FMNH PE 32202
Scorpiones - Mazoniidae	Mazonia woodiana⁷ Mazonia woodiana⁷ Meek and Worthen 1868 scorpion FMNH PE 39253 (Taelle coll.)
Ricinulei - Poliocheridae	Poliochera gibbsi n. sp.¹³ Poliochera gibbsi n. sp.¹³ Selden 1992 hooded tickspider FMNH PE29176 (ex. Tom Gibbs coll)
Insecta
Dicondylia - Syntonopteridae	Syntonoptera schucherti³ Syntonoptera schucherti³ Handlirsch 1911 winged insect FMNH PE16216 (ex. Ida Thompson, 1928)
Palaeodictyoptera - Eubleptidae	Eubleptus danielsi² Eubleptus danielsi² Handlirsch 1906 winged insect FMNH PE32045-6 (Herdina), FMNH PE22016 (Dwayne Stone)
Diaphanopterodea - Prochoropteridae	Prochoroptera calopteryx Prochoroptera calopteryx Handlirsch 1911 winged insect FMNH PE25667 (JJF-IL-007)
Protorthoptera - Eucaenidae	Eucaenus ovalis⁴ Eucaenus ovalis⁴ Scudder 1885 winged insect FMNH PE 20790
Dicondylia - Srokalarvidae	Srokalarva berthei n. gen. n. sp.⁶ Srokalarva berthei n. gen. n. sp.⁶ Haug et al. 2016 winged insect FMNH MCP-322
Artiopoda
Vicissicaudata -	Tardisia brodeae⁹ Tardisia brodeae⁹ MCCoy et al. 2025 Paratype FMNH PE88856
Myriapoda
Chilognatha - Hexecontasomatidae	Hexecontasoma carinatum n. gen. n. sp.⁵ Hexecontasoma carinatum n. gen. n. sp.⁵ Hannibal 2000 millipede FMNH PE 23487, 13656
Priapulidae
- Priapulidae	Priapulites konecniorum n. gen. n. sp.¹² Priapulites konecniorum n. gen. n. sp.¹² Schram 1973 FMNH PE21555, 21412
Enoplea
Chromadorida - Nemavermidae	"Nemavermes mackeei n. gen. n. sp." = Tullimonstrum gregarium¹² "Nemavermes mackeei n. gen. n. sp." = Tullimonstrum gregarium¹² Richardson 1966 FMNH PE21551
Petromyzontida
- Gilpichthyidae	Gilpichthys greeni¹ Gilpichthys greeni¹ Bardack and Richardson 1977 Holotype FMNH PE18703
- Pipisciidae	Pipiscius zangerli¹ Pipiscius zangerli¹ Bardack and Richardson 1977 Holotype FMNH PF8344

Cyclostomi -	Squirmarius testai n. gen. n. sp.¹⁰ Squirmarius testai n. gen. n. sp.¹⁰ McCoy et al. 2023 FMNH PF 17809, 17810, 17811, 17812
Amphibia
Temnospondyli - Amphibamidae	Amphibamus grandiceps¹¹ Amphibamus grandiceps¹¹ Cope 1865 tetrapod FMNH PR558, 664
Archisymplectes rhothon
-	Archisymplectes rhothon n. gen. n. sp.¹² Archisymplectes rhothon n. gen. n. sp.¹² Schram 1973 FMNH PE12670, 12669, 21552

¹Bardack and Richardson 1977; ²Carpenter 1983; ³Carpenter 1987; ⁴Carpenter and Richardson 1976; ⁵Hannibal 2000; ⁶Haug et al. 2015; ⁷Kjellesvig-Waering 1986; ⁸Kluessendorf and Doyle 2003; ⁹MCCoy et al. 2025; ¹⁰McCoy et al. 2023; ¹¹Schoch and Milner 2014; ¹²Schram 1973; ¹³Selden 1992