ADa-2 Rep 2 (Paleocene to of the United States)

Where: Dale County, Alabama (31.6° N, 85.8° W: paleocoordinates 33.9° N, 68.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: "Ostrea thirsae" Member (Nanafalia Formation), Middle Paleocene to Middle Paleocene (61.7 - 55.8 Ma)

• Replicates are ~1m separated from one another

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; poorly lithified, gray, argillaceous, calcareous sandstone

• poorly lithified, light grey calcareous, glauconitic, clayey sand, contains large pieces of carbonized wood

Size class: mesofossils

Collection methods: bulk, surface (in situ), sieve,

• Gastropod shells were only counted if they contained the apex of the shell; bivalves shells were only counted if they contained the umbo, used a 2mm sieve.

Primary reference: J. A. Sessa, M. E. Patzkowsky, and T. J. Bralower. 2009. Impact of lithification on the diversity, size distribution, and recovery dynamics of marine invertebrate assemblages. Geology 37(2):115-118 [M. Patzkowsky/J. Sessa/J. Sessa]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 85562: authorized by Mark Patzkowsky, entered by Jocelyn Sessa on 08.01.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Arcida - Glycymerididae
Glycymeris idonea Conrad 1865 clam
Glycymeris idonea subsp.
 Pectinida - Pectinoidae
Chlamys sp. Röding 1798 scallop
 Ostreida - Ostreidae
"Ostrea ? arrosis" = Ostrea (Ostrea) arrosis
"Ostrea ? arrosis" = Ostrea (Ostrea) arrosis Aldrich 1904 oyster
 Ostreida - Pteriidae
Pteria sp. Scopoli 1777 pearl oyster
 Carditida - Crassatellidae
"Crassatella halei" = Crassatella aquiana
"Crassatella halei" = Crassatella aquiana Clark 1895 clam
 Carditida - Carditidae
Venericardia nanaplata Gardner and Bowles 1939 clam
 Pholadida - Corbulidae
 Pholadida - Pholadidae
Pholas sp. Linnaeus 1758 clam
 Cardiida - Ungulinidae
 Cardiida - Veneridae
Pitar nuttalliopsis venus clam
Pitar nuttalopsis greggi and fulrus; 4 fulrus
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
Tellina bellsiana tellin clam
Tellina greggi tellin clam
 Cardiida - Cardiidae
Acanthocardia tuomeyi Aldrich 1886 cockle
 Thraciida - Periplomatidae
Periploma sp. Schumacher 1816 clam
 Lucinida - Lucinidae
Epilucina sp. Dall 1901 clam
 Nuculida - Nuculidae
Nucula sp. Lamarck 1799 nut clam
 Protobranchia - Nuculanidae
Nuculana corpulentoides pointed nut clam
Nuculana corpulentoides var.
Gastropoda
 Cephalaspidea - Retusidae
Retusa sp. Brown 1827 snail
 Neogastropoda - Buccinidae
Pseudoliva sp. Swainson 1840 true whelk
 Neogastropoda - Cancellariidae
Bonellitia sp. Jousseaume 1887 snail
 Neogastropoda - Volutidae
Caricella sp., "Volutocorbis rugatus" = Athleta (Volutocorbis)
Caricella sp. Conrad 1835 volute
"Volutocorbis rugatus" = Athleta (Volutocorbis) volute
 Neogastropoda - Turridae
"? Surcula nasuta" = Turricula
"? Surcula nasuta" = Turricula turrid
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
Sigatica sp. Meyer and Aldrich 1886 moon snail
Euspira marylandica Conrad 1865 moon snail
Polinices onustus moon snail
 Calyptraeoidea - Calyptraeidae
"Calyptraea aperta" = Calyptraea (Trochita) aperta
"Calyptraea aperta" = Calyptraea (Trochita) aperta Solander 1766 slipper shell
 Sorbeoconcha - Turritellidae
Mesalia sp. Gray 1847 turret shell
Turritella praecincta turret shell
 Architectonicoidea - Architectonicidae
? Architectonica sp. Röding 1798 sundial