Where: Prince Georges County, Maryland (39.0° N, 76.9° W: paleocoordinates 39.7° N, 54.8° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Brightseat Formation (Pamunkey Group), Danian (66.0 - 61.6 Ma)
• Brightseat rest unconformably upon Cretaceous Severn Formation and is overlain unconformably by the Paleocene (Thanetian) Aquia Formation.
• group of beds-level stratigraphic resolution
Environment/lithology: shallow subtidal; unlithified, bioturbated, fine, micaceous, gray, green, silty sandstone
Primary reference: D. L. Govoni. 1983. Gastropod Molluscs from the Brightseat Formation (Paleocene: Danian) of Maryland. [A. Miller/J. Sessa]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 83135: authorized by Arnold Miller, entered by Jocelyn Sessa on 08.08.2008
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Gastropoda | |
Neverita potomacensis n. sp.
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Lacuna feorra n. sp.
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Pasitheola marylandensis n. sp.
Pasitheola marylandensis n. sp. snail | |
"Circulus" "form A", Vitrinella clarkmartini n. sp., ? Anticlimax gardnerae n. sp., Cyclostremiscus sohli n. sp.
"Circulus" "form A" Jeffreys 1842 snail
? Anticlimax gardnerae n. sp. snail
Cyclostremiscus sohli n. sp. snail | |
? Pyropsis sp. Conrad 1860 snail | |
Siphonalia potomacensis n. sp. true whelk
Lacinia pygmaea n. sp. true whelk
Pseudoliva longicostata n. sp. true whelk | |
cf. Calyptraphorus jacksoni Clark 1895 snail | |
Eulima "form A" Risso 1826 snail
Eulima brightseatensis n. sp. snail | |
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cf. Torcula sp., Haustator premortoni n. sp., Haustator "form A", ? Haustator gnoma n. sp., Sigmesalia palmerae n. sp., Torquesia prehumerosa n. sp.
cf. Torcula sp. Gray 1847 turret shell
Haustator "form A" Monfort 1810 turret shell
Sigmesalia palmerae n. sp. turret shell | |
Calyptraea aldrichi n. sp.
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Ataphrus glandula snail | |
Solariorbis "form A" Conrad 1865 snail
Solariorbis laurelae n. sp. snail | |
Mathilda "form B", Mathilda marylandensis n. sp., Mathilda crebricosta n. sp., Mathilda "form C", Mathilda "form A", Mathilda kauffmani n. sp., Acrocoelum richardsi n. sp., ? Tuba sp.
Acrocoelum richardsi n. sp. snail
? Tuba sp. Lea 1823 snail | |
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Syrnola toulmini n. sp., Creonella obscuriplica n. sp., aff. Odostomia insignifica, "Menestho "form A"" = Odostomia (Menestho)
Creonella obscuriplica n. sp. snail | |
Gilbertina texana snail | |
? Umbraculum sp. Schumacher 1817 snail | |
Scaphander potomacensis n. sp.
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