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
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, edited by Pete Wagner
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
| |
Acanthocardia tuomeyi Aldrich 1886 cockle | |
? Tellina subtriangularis tellin clam
Tellina sp. Linnaeus 1758 tellin clam
Tellina bellsiana tellin clam
Tellina greggi tellin clam | |
Corbula subcompressa clam | |
Pholas sp. Linnaeus 1758 clam | |
Periploma sp. Schumacher 1816 clam | |
Epilucina sp. Dall 1901 clam | |
Venericardia nanaplata Gardner and Bowles 1939 clam | |
Crassatella sp. Lamarck 1799 clam | |
Chlamys sp. Röding 1798 scallop | |
"Ostrea ? arrosis" = Ostrea (Ostrea) arrosis
"Ostrea ? arrosis" = Ostrea (Ostrea) arrosis Aldrich 1904 oyster | |
Pteria sp. Scopoli 1777 pearl oyster | |
| |
Nucula sp. Lamarck 1799 nut clam | |
Calorhadia cf. aldrichiana pointed nut clam | |
Gastropoda | |
Retusa sp. Brown 1827 snail | |
? Architectonica sp. Röding 1798 sundial | |
"? Surcula nasuta" = Turricula
"? Surcula nasuta" = Turricula snail | |
Pseudoliva sp. Swainson 1840 true whelk | |
"Volutocorbis rugatus" = Athleta (Volutocorbis), Caricella sp.
"Volutocorbis rugatus" = Athleta (Volutocorbis) volute
Caricella sp. Conrad 1835 volute | |
Bonellitia sp. Jousseaume 1887 snail | |
Sigatica sp. Meyer and Aldrich 1886 moon snail
Natica sp. Scopoli 1777 moon snail
Euspira marylandica Conrad 1865 moon snail
Polinices onustus moon snail | |
Mesalia sp. Gray 1847 turret shell
Turritella praecincta turret shell | |
"Calyptraea aperta" = Calyptraea (Trochita) aperta
"Calyptraea aperta" = Calyptraea (Trochita) aperta Solander 1766 slipper shell |