Atrypid fauna of the Zygospira-Hebertella community, Reedsville and Martinsburg (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 Fm.s"

Environment/lithology: transition zone or lower shoreface; calcareous siltstone

• "calcareous mud and silt. deeper than orthid fauna (outer infralittoral) 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: general faunal/floral analysis

PaleoDB collection 407: authorized by Jack Sepkoski, entered by Mike Sommers on 03.12.1998

Creative Commons license: CC BY (attribution)

Taxonomic list

• "Bretsky, 1969, GSA Bull. Bretsky, 1970, Peabody Mus. Bull. 34"
Show authors, comments, and common names
Gastropoda
 Murchisoniina - Hormotomidae
? Hormotoma sp.
? Hormotoma sp. Salter 1859 snail
originally entered as "? Murchisonia sp."
Bivalvia
 Modiomorphida - Modiomorphidae
Modiolopsis modiolaris
Modiolopsis modiolaris Conrad 1838 clam
 Myalinida - Ambonychiidae
Ambonychia sp.
Ambonychia sp. Hall 1847 clam
2 species
 Ostreida - Pterineidae
Pterinea demissa
Pterinea demissa Conrad 1842 oyster
Rhynchonellata
 Atrypida - Anazygidae
"Zygospira ? recurvirostra" = Anazyga recurvirostra
"Zygospira ? recurvirostra" = Anazyga recurvirostra Hall 1847
originally entered as "Zygospira ? recurvirostra"
Stenolaemata
 Trepostomida - Amplexoporidae
Amplexopora sp.
 Trepostomida - Monticuliporidae
? Peronopora sp., Monticulipora sp.
? Peronopora sp. Nicholson 1881
originally entered as "? Peronopora sp."
Monticulipora sp. d'Orbigny 1850
 Trepostomata - Batostomellidae
Batostomella sp.
Batostomella sp. Bassler 1911
 Trepostomata - Halloporidae
Hallopora sp.
Hallopora sp. Bassler 1911
 Trepostomata - Heterotrypidae
Heterotrypa sp.
Heterotrypa sp. Nicholson 1879