Cynthia Pit (Eocene of the United States)
Also known as Jackson Ready-Mix Concrete Company, Miss Lite Division quarry
Where: Hinds County, Mississippi (32.5° N, 90.3° W: paleocoordinates 33.1° N, 82.4° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Yazoo Formation (Jackson Group), Priabonian (38.0 - 33.9 Ma)
• upper third of Yazoo
between 15 and 45 meters from the top of the Yazoo (135 m thick), above the foram extinction level
~34.3 Ma age date from correlative bentonites
• group of beds-level stratigraphic resolution
Environment/lithology: offshore; unlithified, shelly/skeletal, gray claystone
• fossiliferous. blocky, blue gray clay
fossils interspersed throughout, with shell hash beds that become more closely spaced upsection
Size class: mesofossils
Preservation: original aragonite, original calcite
Collection methods: bulk, mechanical, sieve,
Primary reference: D. M. Haasl and T.A. Hansen. 1996. Timing of latest Eocene molluscan extinction patterns in Mississippi. Palaios 11(5):487-494 [L. Ivany/L. Ivany]more details
Purpose of describing collection: paleoecologic analysis
PaleoDB collection 6802: authorized by Linda Ivany, entered by Linda Ivany on 17.03.2000, edited by Mark Uhen and Jocelyn Sessa
Creative Commons license: CC BY (attribution)
Taxonomic list
• mollusks only
Show authors, comments, and common names
| unclassified | |
| Cephalopoda | |
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Belosaepia sp. Voltz 1830 | |
| Scaphopoda | |
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Cadulus sp. Philippi 1844 tusk shell | |
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Dentalium sp. Linnaeus 1758 tusk shell | |
| Gastropoda | |
Odostomia jacksonensis, "Turbonilla (Strioturbonilla) major" = Turbonilla major, "Pyramidella (Syrnola) meyeri" = Syrnola meyeri, Pyramidella bastropensis
Odostomia jacksonensis snail
"Turbonilla (Strioturbonilla) major" = Turbonilla major Meyer 1887 snail Turbonilla (Strioturbonilla) major
Pyramidella bastropensis snail | |
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Architectonica (Architectonica) bellistriata Conrad 1854 sundial Architectonica (Architectonica) bellistriata
Architectonica (Granosolarium) meekana Harris and Palmer 1947 sundial Architectonica (Granosolarium) meekana subsplendida
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Ringicula sp. Deshayes 1838 snail | |
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? Tornatellaea lata Conrad 1834 snail
Acteon annectens Meyer 1885 snail | |
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Mathilda regularis Meyer 1886 snail | |
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Cirsotrema (Coroniscala) danvillense Harris and Palmer 1947 wentletrap Cirsotrema (Coroniscala) danvillense
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Bittium koeneni cerith snail | |
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Turritella sp. Lamarck 1799 turret shell
"Turritella arenicola" = Kapalmerella arenicola Conrad 1865 turret shell Turritella arenicola danvillensis
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Melanella jacksonensis de Gregorio 1890 snail | |
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Caricella howei Harris and Palmer 1947 volute
Athleta sp. Conrad 1853 volute | |
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"Conomitra hammakeri" = Mitra hammakeri
"Conomitra hammakeri" = Mitra hammakeri Harris 1894 mitre shell | |
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Levifusus spiniger snail | |
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Cantharus sp. Röding 1798 true whelk
"Tritiaria albirupina" = Phos albirupina Harris 1894 true whelk | |
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Tritonatractus pearlensis Aldrich 1885 snail Tritonoatractus pearlensis danvillensis [entered as Tritonoatractus pearlensis]
Latirus sp. Monfort 1810 snail | |
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Cymatosyrinx palmerae Harris and Palmer 1947 snail | |
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Asthenotoma danvitexa Harris and Palmer 1947 snail
Cordieria ludoviciana Vaughn 1896 snail
Pseudotoma heilprini Aldrich 1885 snail
Microdrillia ouachitae snail | |
Pleurofusia danvicola, Infracoronia ludoviciana, Sinistrella americana, Eucheilodon crenocarinata, ? Eopleurotoma sp., "Coronia montgomeryensis" = Gemmula (Coronia), Coronia conjuncta, Coronia nodulina
Pleurofusia danvicola Harris 1937 turrid
Sinistrella americana Aldrich 1885 turrid
Eucheilodon crenocarinata turrid
? Eopleurotoma sp. Cossmann 1889 turrid
"Coronia montgomeryensis" = Gemmula (Coronia) turrid
Coronia conjuncta Casey 1904 turrid | |
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"? Eodrillia sp." = Tropisurcula (Eodrillia), Cochlespira bella
"? Eodrillia sp." = Tropisurcula (Eodrillia) Casey 1904 snail | |
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Bonellitia jacksonica Cooke 1926 snail | |
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Pyramimitra ? terebraeformis Conrad 1848 ribbed mitre | |
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Natica permunda Conrad 1854 moon snail
Polinices weisbordi moon snail | |
"Teinostoma (Idioraphe) verrilli" = Teinostoma (Idioraphie)
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? Ottoina sp. Harris and Palmer 1947 snail | |
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Mnestia meyeri Cossmann 1893 snail | |
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Scaphander ? jacksonensis Harris and Palmer 1947 snail
Abderospira oviformis Meyer 1886 snail | |
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Limacina sp. Bosc 1817 snail | |
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Bovicornu eocenense snail | |
| Bivalvia | |
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Yoldia sp. Möller 1842 clam | |
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Nuculana sp. Link 1807 pointed nut clam | |
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Nucula sp. Lamarck 1799 nut clam | |
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? Modiolus sp. Lamarck 1801 mussel | |
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Ostrea falco oyster | |
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Atrina sp. Gray 1842 oyster | |
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Chlamys danvillensis scallop | |
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Limopsis sp. Sassi 1827 clam | |
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? Trinacria sp. Mayer 1868 clam | |
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Gonimyrtea curta clam | |
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Periploma sp. Schumacher 1816 clam | |
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Corbula densata Conrad 1854 clam | |
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Pitar securiformis Conrad 1865 venus clam | |
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Nemocardium nicolletti Conrad 1854 cockle | |
"Venericardia diversidentata" = Venericardia (Rotundicardia) diversidentata, Venericardia apodensata
"Venericardia diversidentata" = Venericardia (Rotundicardia) diversidentata Meyer 1885 clam | |
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Lirodiscus sp. Conrad 1869 clam | |
| Mammalia | |
Cynthiacetus maxwelli n. gen. n. sp.3
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| Reptilia | |
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| Pasithea | |
"Niso umbilicata" = Pasithea umbilicata
"Niso umbilicata" = Pasithea umbilicata Lea 1833 | |