Drilling on the Herkimer farm, 2.41 km northwest of the center of Mattoon (Devonian of the United States)

Where: Coles County, Illinois (39.5° N, 88.4° W: paleocoordinates 38.0° S, 36.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Grand Tower Limestone Formation, Middle Devonian (393.3 - 382.7 Ma)

• collection comes from "underground cavity 15.2 m below the base of the Chattanooga or New Albany black shale...it seems plausible that the encountered cave is in the upper strata of the Grand Tower Limestone, which is presumed to a correlative of the Detrior River Series and indeed with the uppermost unit of the series, the Anderdon Limestone."

• group of beds-level stratigraphic resolution

Environment/lithology: marine; limestone

Reposited in the UMMP

• "A large number of external casts of brachiopods, corals, and charophytes were also recovered from the well... all brachiopods were juveniles that had not developed enough adult characters for positive taxonomic placement...The corals are being studied by Dr. William A. Oliver...The charophytes are similar to Trochiliscus bellatulus."

Primary reference: R. M. Linsley and R. V. Kesling. 1982. A Detroit River (Middle Devonian) Fauna from the Subsurface of Illinois. Journal of Paleontology 56(5):1079-1092 [A. Miller/J. Sessa/J. Sessa]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24285: authorized by Arnold Miller, entered by Jocelyn Sessa on 04.08.2002, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• Specimens are reposited at the University of Michigan Museum of Paleontology.
 Palaeocopida - Beyrichiidae
Phlyctiscapha spp. Kesling 1953 ostracod
possibly 4
 Palaeocopida - Welleriellidae
 Palaeocopida -
 Platycopida - Kloedenellidae
? Kloedenella sp. ostracod
 Podocopida - Bairdiocyprididae
Cytherellina sp. Jones and Holl 1869 ostracod
 Euomphalina - Pseudophoridae
Petrochus conica, "Anematina cf. mellaria" = Petrochus mellaria
Petrochus conica Tyler 1965 snail
"Anematina cf. mellaria" = Petrochus mellaria Tyler 1965 snail
 Euomphalina - Tychobraheidae
"Holopea antiqua" = Asinomphalus antiqua
"Holopea antiqua" = Asinomphalus antiqua Vanuxem 1842 snail
 Euomphalina - Elasmonematidae
Elasmonema corrugata Stauffer 1909 snail
 Euomphalina -
"Straparollus (Serpulospira) sp." = Serpulospira, "Straparollus (Serpulospira) diversiformis" = Serpulospira diversiformis
"Straparollus (Serpulospira) sp." = Serpulospira Cossmann 1915 snail
"Straparollus (Serpulospira) diversiformis" = Serpulospira diversiformis Linsley 1968 snail
over 80
 Pleurotomariida - Eotomariidae
Bembexia gradilispira n. sp. Linsley and Kesling 1982 snail
 Pleurotomariida - Gosseletinidae
Mourlonia sp. de Koninck 1883 snail
"Euryzone petilitornata" = Bicarina petilitornata Linsley 1968 snail
Euryzone latitornata Linsley 1968 snail
 Pleurotomariida - Portlockiellidae
Nodonema granulatum Linsley 1968 snail
 Bellerophontida - Tropidodiscidae
 Murchisoniina - Murchisoniidae
Murchisonia sibleyensis Linsley 1968 snail
Murchisonia anderdoniae Linsley 1968 snail
Murchisonia akidota Linsley 1968 snail
Murchisonia aff. akidota Linsley 1968 snail
 Neritoidea - Naticopsidae
"Naticopsis (Naticopsis) planifrons" = Naticopsis planifrons, Naticopsis (Naticopsis) sp.
"Naticopsis (Naticopsis) planifrons" = Naticopsis planifrons Linsley 1968 snail
Naticopsis (Naticopsis) sp. M'Coy 1844 snail
 Conocardiida - Bransoniidae
 Nuculida - Nuculidae
? Nuculoidea sp. Williams and Berger 1916 nut clam
 Ostreida - Pterineidae