PBDB Collection

Trilobites of the Sthenarocalymene celebra Assoc., Grafton, Illinois (Silurian to of the United States)

Where: Illinois (39.0° N, 90.4° W: paleocoordinates 26.4° S, 54.5° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Racine Dolomite Formation, Wenlock to Wenlock (433.4 - 423.0 Ma)

• General age of community stated as Racine Dolomite [and presumably equivalents?], Late Wenlock to Ludlow.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; dolomitic, argillaceous lime mudstone

• "BA 4 based on occurrence with the nearer shorline part of the Dicoelosia-Skenidioides Community...deposited under low energy conditions.. [state of articulation varies].."

•SEP environmental call based on given information and regional context

• "Community...occurs in well-bedded, slightly argillaceous, micritic, nonreef strata of the Racine Dolomite..."

Collection methods: Relative abundances given for trilobites. The data are for collections amassed over many years. Other taxa not listed include brachiopods, pisocrinid crinoids, nautiloids, gastropods, rugose corals, trace fossils.

Primary reference: D. G. Mikulic. 1999. Silurian trilobite associations in North America. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 793-798 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 24938: authorized by Michael Foote, entered by Michael Foote on 23.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Cerauromerus hydei, Scutelluida indet. Cerauromerus hydei genus name in quotes Scutelluida indet.
Trilobita
Odontopleurida - Odontopleuridae	Ceratocephala cf. goniata Ceratocephala cf. goniata Warder 1838 trilobite
Proetida - Proetidae	"Proetus handwerki" = Pseudogerastos handwerki "Proetus handwerki" = Pseudogerastos handwerki Weller 1907 trilobite
Proetida - Aulacopleuridae	Harpidella sp. Harpidella sp. M'Coy 1849 trilobite
Corynexochida - Illaenidae	Bumastus sp., Bumastus graftonensis, Bumastus cf. cuniculus Bumastus sp. Murchison 1839 trilobite Bumastus graftonensis Meek and Worthen 1870 trilobite Bumastus cf. cuniculus Hall 1868 trilobite
Corynexochida - Styginidae	Illaenoides triloba Illaenoides triloba trilobite
Lichida - Lichidae	Hemiarges sp., Trochurus welleri, Dicranopeltis decipiens, Arctinurus sp. Hemiarges sp. Gürich 1901 trilobite Trochurus welleri trilobite Dicranopeltis decipiens Weller 1907 trilobite Arctinurus sp. Castelnau 1843 trilobite
Phacopida - Cheiruridae	Cheirurus cf. niagarensis, Deiphon americanus, Sphaerexochus cf. romingeri Cheirurus cf. niagarensis Hall 1868 trilobite Deiphon americanus trilobite Sphaerexochus cf. romingeri Hall 1868 trilobite
Phacopida - Encrinuridae	Staurocephalus obsoleta, Encrinurus egani, Encrinurus sp. Staurocephalus obsoleta trilobite Encrinurus egani trilobite Encrinurus sp. Emmrich 1844 trilobite
Phacopida - Calymenidae	"Sthenarocalymene celebra" = Calymene celebra "Sthenarocalymene celebra" = Calymene celebra Raymond 1916 trilobite
Phacopida - Dalmanitidae	"Dalmanites illinoisensis" = Dalmanites, "Dalmanites platycaudatus" = Dalmanites, "Ommokris obex" = Dalmanites, Lygdozoon arkansana "Dalmanites illinoisensis" = Dalmanites trilobite "Dalmanites platycaudatus" = Dalmanites trilobite "Ommokris obex" = Dalmanites trilobite Lygdozoon arkansana trilobite name corrected from "Lygduzoon"
Phacopida - Phacopidae	Eophacops handwerki Eophacops handwerki trilobite