Christ Hospital, (CHS1) (Ordovician of the United States)

Also known as Was: Christ Hospital, (CHS1), Miamitown Shale, Cincinnati, Ohio

Where: Ohio (39.1° N, 84.5° W: paleocoordinates 26.2° S, 60.2° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Amorphognathus superbus conodont zone, Miamitown Formation, Maysvillian (452.0 - 449.5 Ma)

• Lower Maysvillian age. Sample #1 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 1051.6 square-cm. At least 113 specimens counted; 103 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 64421: authorized by Phil Novack-Gottshall, entered by Phil Novack-Gottshall on 08.09.2006, edited by Alycia Stigall

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.
 Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840 trilobite
1 cephalon
Flexicalymene meeki Foerste 1910 trilobite
2 body fragments (articulated pleurites), 1 pygidium, 1 cephalon
 Strophomenida - Rafinesquinidae
Rafinesquina alternata Conrad 1838
5 pedicle valves
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
57 complete, articulated specimens
 Orthida - Platystrophiidae
Platystrophia sp. King 1850
3 indeterminate valves, disarticulated
Platystrophia crassa1
1 individual
 Orthida - Plectorthidae
Hebertella occidentalis Hall 1847
4 brachial valves
Hebertella occidentalis1 Hall 1847
1 individual
 Myalinida - Ambonychiidae
Ambonychia sp.2 Hall 1847 clam
7 disarticulated valves, internal molds
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa2
"Caritodens demissa" = Pterinea demissa2 Conrad 1842 oyster
1 recrystallized valve
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris2 Conrad 1838 clam
2 valves, internal molds, disarticulated
 Trochonematoidea - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni2
"Lophospira bowdeni" = Paupospira bowdeni2 Safford 1869 snail
26 internal molds; count only includes specimens with more than two whorls
 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 indet. Miller 1821 Sea lily
3 columnals, approximately 1% coverage by area