Christ Hospital, (CHS7), Miamitown Shale, Cincinnati, Ohio (Ordovician of the United States)

Where: Ohio (39.1° N, 84.5° W: paleocoordinates 26.6° S, 62.3° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Miamitown Formation, Caradocian (460.9 - 449.5 Ma)

• Lower Maysvillian age. Sample #7 collected. Details on stratigraphy and sedimentation (lithology), and additional details of gastropod and bivalve fauna are included from Novack-Gottshall and Miller (2003) [PBDB reference #18186] and field notes.

• bed-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, shelly/skeletal packstone

• Sequence C2 (from Holland and Patzkowsky, 1996)
• Gastropod-rich packstone/wackestone

Size classes: macrofossils, mesofossils

Preservation: mold/impression, recrystallized, original calcite, replaced with calcite

Collection methods: bulk, mechanical,

• Bulk collection made in field and weighed, cleaned, prepped, and identified in lab at University of Cincinnati. Sample dimensions are 361.3 square-cm. At least 59 specimens counted; 52 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Fragmented trepostome bryozoans, crinoid columnals, and fragmented trilobites were counted as estimated percent cover using standard percent cover reference chart.

Primary reference: P. M. Novack-Gottshall. 1999. Comparative geographic and environmental diversity dynamics of gastropods and bivalves during the Ordovician Radiation (M.S. thesis, University of Cincinnati). 1-191 [P. Novack-Gottshall/P. Novack-Gottshall/P. Novack-Gottshall]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 64422: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 08.09.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Representative samples (standards) of species used for taxonomic identification reference are stored at the University of Cincinnati. Many unidentifiable bivalves are not included in taxonomic list.
Trilobita
 Phacopida - Calymenidae
Flexicalymene meeki Foerste 1910 trilobite
1 cephalon, 1 pygidium, 1 body fragment (articulated sclerites but missing cephalon and pygidium); probably associated remains
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata Conrad 1838
4 pedicle, 3 brachial valves
Rhynchonellata
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
33 articulated and complete specimens
 Orthida - Platystrophiidae
Platystrophia sp. King 1850
3 brachial valves
 Orthida - Plectorthidae
Hebertella occidentalis Hall 1847
1 brachial valve
Gastropoda
 Trochonematoidea - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
10 internal molds; count only includes specimens with more than two whorls
Stenolaemata
 Cryptostomata -
Cryptostomata indet. Vine 1884
Thin, sheet-branching cryptostomate bryozoan, fragmented
 Trepostomata - Halloporidae
Halloporidae "indet. A" Bassler 1911
Monticulated, large, thick halloporid trepostome, fragmented
Halloporidae "indet. B" Bassler 1911
Smooth, thin, branching halloporid trepostome, fragmented
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
2 columnals, approximately 1% coverage (by area)