Rhynchonellid fauna of the Orthorhynchula-Ambonychia community, Reedsville and M (Ordovician of the United States)

Where: Maryland (39.3° N, 77.7° W: paleocoordinates 29.2° S, 55.3° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Late/Upper Ordovician (458.4 - 443.8 Ma)

• "U. Ord. Reedsville and Martinsburg Fms."

Environment/lithology: offshore; sandstone

• "sands and silts. shallow water, between linguloid and strophomenid faunas. geosyncline, highland to E"

Size class: macrofossils

Primary reference: P. W. Bretsky. 1970. Upper Ordovician Ecology of the Central Appalachians. Bulletin of the Peabody Museum of Natural History 34:1-150 [M. Uhen/J. Ju/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 409: authorized by Jack Sepkoski, entered by Mike Sommers on 23.03.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Bretsky, 1969, 1970"
Show authors, comments, and common names
Bivalvia
 Myalinida - Ambonychiidae
Ambonychia sp.
Ambonychia sp. Hall 1847 clam
2 species
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris
Modiolopsis modiolaris Conrad 1838 clam
 Modiomorphida - Allodesmatidae
? Ischyrodonta truncata
? Ischyrodonta truncata clam
originally entered as "? Ischyrodonta truncata"
Rhynchonellata
 Rhynchonellida - Orthorhynchulidae
Orthorhynchula linneyi
Orthorhynchula linneyi James 1881
originally entered as "Orthorhynchula linneyi"
Stenolaemata
 Trepostomata - Heterotrypidae
Dekayia sp.
Dekayia sp. Milne-Edwards and Haime 1851