Glyptambon verrucosus-Calymene breviceps Assoc., Waldron Shale, SE Indiana (Silurian of the United States)

Where: Indiana (39.0° N, 86.0° W: paleocoordinates 27.8° S, 52.2° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Waldron Shale Formation, Wenlock (433.4 - 427.4 Ma)

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; calcareous mudstone

• "...association...occurs in two BAs within two distinct lithologies containing two very different brachiopod communities. Trilobites generally disarticulated...The Waldron Shale associated with these trilobites is a calcareous mudstone containing the Howellella Community which is assiged to BA 3...[The Racine Dolomite] contains a Dicoelosia-Skenidioides Community belonging to BA 4. The taxonomic composition, abundance, and preservatioon of the trilobites, however, is very similar in both occurrences."

•

•2003.04.06: S. Peters environmental/tectonic call based on field experience with unit.

• "calcareous mudstone"

Collection methods: Other taxa generally not listed include brachiopods, crinoids, gastropods, rugose corals, and serpulids.

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 24940: 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
Trilobita
 Proetida - Tropidocoryphidae
Decoroproetus sp.
Decoroproetus sp. Pribyl 1946 trilobite
 Proetida - Aulacopleuridae
Harpidella christyi
 Corynexochida - Illaenidae
Bumastus (Litotix) cf. armatus
 Corynexochida - Styginidae
Illaenoides sp.
Illaenoides sp. Weller 1907 trilobite
 Lichida - Lichidae
Arctinurus boltoni, Lichas breviceps
Arctinurus boltoni Bigsby 1825 trilobite
Lichas breviceps trilobite
 Phacopida - Cheiruridae
Cheirurus dilatatus
Cheirurus dilatatus Raymond 1916 trilobite
 Phacopida - Homalonotidae
Trimerus sp.
Trimerus sp. Green 1832 trilobite
 Phacopida - Calymenidae
Calymene breviceps
Calymene breviceps Raymond 1916 trilobite
 Phacopida - Dalmanitidae
Dalmanites halli, Glyptambon verrucosus
Crinoidea
 Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp.
Eucalyptocrinites sp. Goldfuss 1831 Sea lily