Chancellor Point, Zone 24 (Miocene of the United States)

Where: St. Marys County, Maryland (38.2° N, 76.4° W: paleocoordinates 38.3° N, 74.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Windmill Point Member (Saint Marys Formation), Tortonian (11.6 - 7.2 Ma)

Environment/lithology: marine; blue, sandy claystone

• bluish sandy clay

Size class: macrofossils

Primary reference: G. B. Shattuck. 1904. Geological and paleontological relations, with a review of earlier investigations. Maryland Geological Survey Miocene Text xxxiii-clv [M. Uhen/M. Uhen]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 70853: authorized by Mark Uhen, entered by Mark Uhen on 09.04.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

Aves
 Charadriiformes - Alcoidae
Alca cf. torda1 Linnaeus 1758 razorbill
Bivalvia
 Cardiida - Tellinidae
Florimetis biplicata2 Conrad 1834 tellin clam
 Cardiida - Cardiidae
Chesacardium laqueatum2 Conrad 1830 cockle
subspecies laqueatum
 Cardiida - Mactridae
Mactrodesma subponderosa2 d'Orbigny 1852 clam
Leptomactra delumbis2 Conrad 1832 clam
 Cardiida - Glossidae
"Isocardia fraterna" = Glossus fraterna, Glossus santamaria2
"Isocardia fraterna" = Glossus fraterna Say 1824 clam
Glossus santamaria2 Ward 1992 clam
 Cardiida - Veneridae
"Lirophora alveata" = Lirophora (Lirophora) alveata2, Dosinia acetabulum2, "Venus campechiensis" = Mercenaria campechiensis, Mercenaria tetrica2, "Callocardia sayana" = Pitar morrhuanus, "Clementia inoceriformis" = Clementia (Clementia) inoceriformis2
"Lirophora alveata" = Lirophora (Lirophora) alveata2 Conrad 1831 venus clam
Dosinia acetabulum2 Conrad 1832 venus clam
subspecies thori
"Venus campechiensis" = Mercenaria campechiensis Gmelin 1791 quahog
var. mortoni
Mercenaria tetrica2 Conrad 1838 quahog
"Callocardia sayana" = Pitar morrhuanus Dall 1902 venus clam
"Clementia inoceriformis" = Clementia (Clementia) inoceriformis2 Wagner 1839 venus clam
 Hiatellida - Hiatellidae
Panopea goldfussii2 Wagner 1839 clam
 Lucinida - Lucinidae
 Carditida - Astartidae
Astarte perplana2 Conrad 1840 clam
 Ostreida - Malleidae
 Ostreida - Ostreidae
Crassostrea sp.2 Sacco 1897 oyster
 Pectinida - Pectinoidae
Chesapecten santamaria2, "Pecten madisonius" = Chesapecten madisonius, "Pecten jeffersonius" = Chesapecten jeffersonius
Chesapecten santamaria2 Tucker 1934 scallop
"Pecten madisonius" = Chesapecten madisonius Say 1824 scallop
"Pecten jeffersonius" = Chesapecten jeffersonius Say 1824 scallop
 Arcida - Arcidae
Dallarca idonea2 Conrad 1832 clam
"Rasia andrewsi" = Anadara (Rasia) andrewsi2 Ward 1992 ark
Gastropoda
 Opisthobranchia - Retusidae
Retusa marylandica Martin 1904 snail
 Cerithioidea - Turritellidae
"Turritella plebeia" = Mariacolpus plebeia2, "Turritella variabilis" = Turritella (Torcula) variabilis, Turritella subvariabilis2
"Turritella plebeia" = Mariacolpus plebeia2 Say 1824 turret shell
subspecies plebeia
"Turritella variabilis" = Turritella (Torcula) variabilis Conrad 1830 turret shell
Turritella subvariabilis2 d'Orbigny 1852 turret shell
subspecies subvariabilis
 Neogastropoda - Costellariidae
"Surcula engonata" = Nodisurculina engonata
"Surcula engonata" = Nodisurculina engonata Conrad 1862 ribbed mitre
 Neogastropoda - Muricidae
Ecphora gardnerae2 Wilson 1987 murex snail
subspecies gardnerae
Urosalpinx subrusticus2 d'Orbigny 1852 murex snail
 Neogastropoda - Melongenidae
"Fulgur fusiforme" = Busycon fusiformis Conrad 1840 whelk
Busycotypus rugosum2 Conrad 1843 whelk
Busycotypus coronatum2 Conrad 1840 whelk
 Neogastropoda - Nassariidae
Bulliopsis marylandica2 Conrad 1862 snail
Bulliopsis quadrata2 Conrad 1830 snail
 Neogastropoda - Fasciolariidae
Buccinofusus parilis2 Conrad 1832 snail
 Neogastropoda - Conidae
Conus deluvianus2 Green 1830 cone shell
 Neogastropoda - Terebridae
"Terebra curvilirata" = Terebra (Acus) curvilirata, "Terebra simplex" = Laevihastula simplex2
"Terebra curvilirata" = Terebra (Acus) curvilirata Conrad 1843 auger snail
"Terebra simplex" = Laevihastula simplex2 Conrad 1830 auger snail
 Heterostropha - Acteonidae
"Actaeon ovoides" = Acteon ovoides
"Actaeon ovoides" = Acteon ovoides Conrad 1830 snail