Mount Airy Forest, (MAF1), Miamitown Shale, Cincinnati, Ohio (Ordovician of the United States)

Where: Ohio (39.2° N, 84.6° W: paleocoordinates 26.5° S, 62.3° W)

• coordinate estimated from map

• hand sample-level geographic resolution

When: Miamitown Formation, Caradoc (458.4 - 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 and lithified shale

• Sequence C2 (from Holland and Patzkowsky, 1996)
• Shale interbedded with gastropod-rich packstone

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 1612.9 square-cm. At least 254 specimens counted; 171 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 64425: 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.
Craniata
 Craniida - Craniidae
Petrocrania scabiosa Hall 1866
1 valve
Strophomenata
 Strophomenida - Rafinesquinidae
Rafinesquina alternata Conrad 1838
61 pedicle valves, 16 brachial valves
Rhynchonellata
 Atrypida - Anazygidae
Zygospira modesta Hall 1847
69 articualted specimens based on number of anterior comissures, 47 specimens based on number of beaks
Stenolaemata
 Trepostomida - Monticuliporidae
Aspidopora sp. Ulrich 1882
3 encrusting colonies
 Trepostomata - Halloporidae
Halloporidae "indet. A" Bassler 1911
Monticulated, large, thick halloporid trepostome, fragmented
Halloporidae "indet. B" Bassler 1911
Smooth, thin, branching halloporid trepostome, fragmented
Gastropoda
 Murchisoniina - Lophospiridae
"Lophospira bowdeni" = Paupospira bowdeni
"Lophospira bowdeni" = Paupospira bowdeni Safford 1869 snail
14 internal molds with apices, 29 with shells bearing at least two whorls, occasionally fragmented
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847 clam
9 valves, disarticulated internal molds
 Ostreida - Pterineidae
"Caritodens demissa" = Pterinea demissa
"Caritodens demissa" = Pterinea demissa Conrad 1842 oyster
2 valves, recrystallized
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris Conrad 1838 clam
2 valves, disarticualted internal molds