AMo-2 Rep 3 (Paleocene of the United States)

Where: Monroe County, Alabama (31.8° N, 87.4° W: paleocoordinates 34.3° N, 70.2° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Bells Landing Marl Member (Tuscahoma Formation), Thanetian (59.2 - 56.0 Ma)

• replicates are all from the fossiliferous layer 7 ft above water level, about 1m apart.

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; unlithified, glauconitic, muddy sandstone

• very fine grained, glauconitic clayey sand.

Size class: mesofossils

Collection methods: bulk, sieve,

• Gastropod shells were only counted if they contained the apex of the shell; bivalves shells were only counted if they contained the umbo.

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 86179: authorized by Mark Patzkowsky, entered by Jocelyn Sessa on 26.01.2009

Creative Commons license: CC BY (attribution)

Taxonomic list

Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
Gastropoda
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Opisthobranchia - Retusidae
 Cerithioidea - Turritellidae
"Turritella mortoni" = Kapalmerella mortoni Conrad 1830 turret shell
Turritella mortoni postmortoni
Mesalia alabamiensis De Gregorio 1890 turret shell
Mesalia alabamiensis tetradeiras
 Neotaenioglossa - Calyptraeidae
"Calyptraea aperta" = Calyptraea (Trochita) aperta
"Calyptraea aperta" = Calyptraea (Trochita) aperta Solander 1766 slipper shell
 Sorbeoconcha - Naticidae
Polinices eminulus Conrad 1833 moon snail
Polinices eminulis var.
Euspira marylandica Conrad 1865 moon snail
Natica sp. Scopoli 1777 moon snail
 Neogastropoda - Buccinidae
 Neogastropoda - Melongenidae
 Neogastropoda - Clavatulidae
"Surcula nasuta" = Turricula
"Surcula nasuta" = Turricula snail
 Neogastropoda - Raphitomidae
 Neogastropoda - Turridae
Coronia childreni Lea 1833 turrid
Coronia childreni var.
 Neogastropoda - Volutidae
? Athleta sp. Conrad 1853 volute
 Sorbeoconcha - Rostellariidae
Bivalvia
 Nuculanida - Nuculanidae
Calorhadia aldrichiana pointed nut clam
"Calorhadia pharcida" = Calorhadia (Calorhadia) pharcida Dall 1898 pointed nut clam
 Pectinida - Pectinoidae
"Chlamys greggi" = Dhondtichlamys greggi
"Chlamys greggi" = Dhondtichlamys greggi Harris 1897 scallop
 Ostreida - Ostreidae
 Arcida - Glycymerididae
Glycymeris idonea Conrad 1865 clam
Glycymeris idonea subspecies
 Cardiida - Tellinidae
Tellina greggi tellin clam
 Cardiida - Veneridae
Pitar nuttalliopsis venus clam
4 Pitar nuttalliopsis greggi
 Pholadida - Corbulidae
"Corbula subengonata" = Cuneocorbula subengonata
"Corbula subengonata" = Cuneocorbula subengonata Dall 1898 clam
 Pholadida - Pholadidae
 Thraciida - Periplomatidae
Periploma sp. Schumacher 1816 clam
 Lucinida - Lucinidae
Epilucina sp. Dall 1901 clam
 Carditida - Carditidae
"Venericardia greggiana" = Venericardia (Baluchicardia) greggiana
"Venericardia greggiana" = Venericardia (Baluchicardia) greggiana Dall 1903 clam
Anthozoa
 Scleractinia - Dendrophylliidae