Where: Para, Brazil (1.0° S, 48.0° W: paleocoordinates 1.0° S, 43.9° W)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Estacao Limestone Member (Pirabas Formation), Early/Lower Miocene (23.0 - 16.0 Ma)
• This collection contains all taxa not specified to either "bed 5, 6, 7, or 8" of Maury (1924). Fauna not very much like that of the Rio Pirabas outcrop, although many species are in common. Molluscan fauna indicate a Lower Miocene age. The deposit is stratigraphically near to the Pirabas Formation, but paleontological evidence is insufficient for an exact correlation. Maury (1924) suggested that it could be synchronous, slightly younger or slightly older. No specimens of Orthaulax have been ound in the fauna, suggesting a younger age, perhaps equivalent to the Gatun Fm. Simone (1994) does not illustrate any other Miocene units in the Parnaiba Basin other than the Pirabas Formation, for which I conclude the Estacao Limestone must now be considered a member of. The Pirabas Fm has a latest Late Oligocene to Middle Miocene age according text. Early Miocene in Vokes (1990), and is accordingly assigned to Early Miocene here.
• member-level stratigraphic resolution
Environment/lithology: lithified, fine-grained, shelly/skeletal, gray, calcareous limestone
Size class: macrofossils
Preservation: cast, mold/impression
Collection methods: quarrying,
• Artificial casts of the external molds were made. Collected by F. de Carvalho and Dr. Gonzaga for G. de Campos of the Brazil Geological Survey. Types are reposited at the Museum of the Brazil Geological Survey.
Primary reference: C. J. Maury. 1924. Fosseis Terciarios Do Brazil. Servico Geologico E Mineralogico Do Brazil Monographia 49 [A. Miller/A. Hendy/P. Wagner]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 60980: authorized by Austin Hendy, entered by Austin Hendy on 28.05.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Gymnolaemata | |
Bivalvia | |
Glycymeris cf. eumita Maury 1924 clam | |
"Scapharca ? melloi" = Scapharca (Cunearca) melloi, Scapharca agronomica n. sp., Scapharca recondita n. sp., Scapharca agraria n. sp.
"Scapharca ? melloi" = Scapharca (Cunearca) melloi Maury 1924 ark Closely related member of A. transversa group
Scapharca agronomica n. sp. clam
Scapharca agraria n. sp. clam | |
Pecten cererideditus n. sp.
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Plicatula eroessa n. sp.
Plicatula eroessa n. sp. scallop | |
Venericardia agriculturae n. sp., Venericardia amazoniana n. sp.
Venericardia agriculturae n. sp. clam
Venericardia amazoniana n. sp. clam | |
Lucina frugalis n. sp.
| |
Corbula agricolae n. sp., Corbula vertumni n. sp.
| |
"Cardium (Fragum) estacianum n. sp." = Fragum, "Cardium (Trachycardium) hortensium n. sp." = Trachycardium, "Cardium (Trachycardium) viridarii n. sp." = Trachycardium
"Cardium (Fragum) estacianum n. sp." = Fragum cockle
"Cardium (Trachycardium) hortensium n. sp." = Trachycardium cockle
"Cardium (Trachycardium) viridarii n. sp." = Trachycardium cockle | |
"Psammosolen cereris n. sp." = Solecurtus cereris
"Psammosolen cereris n. sp." = Solecurtus cereris Maury 1924 clam Not unlike P. cumingianus and P. sanctidominici
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Antigona proserpinae n. sp., "Chione agraria" = Chione (Lirophora) agraria, "Pitaria vertumni n. sp." = Pitar (Lamelliconcha) vertumni
Antigona proserpinae n. sp. venus clam Similar in sculpture to A. sanctaenoctis; several internal molds and some external imprints
"Chione agraria" = Chione (Lirophora) agraria White 1887 venus clam
"Pitaria vertumni n. sp." = Pitar (Lamelliconcha) vertumni Maury 1924 venus clam | |
Echinochama pristina, Chama agronomica n. sp.
Chama agronomica n. sp. jewel box | |
"Leda (Adrana) agronomica n. sp." = Adrana agronomica
"Leda (Adrana) agronomica n. sp." = Adrana agronomica Maury 1924 pointed nut clam Similar to L. (A.) aldrichiana; frail single specimen, apparently crumbled during illustration
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Gastropoda | |
"Solarium eudaidelum" = Trochus (Solarium) top snail | |
"Solarium intraornatum" = Architectonica nobilis
"Solarium intraornatum" = Architectonica nobilis Röding 1798 sundial | |
Turritella agronomica n. sp., Turritella callizona n. sp.
Turritella callizona n. sp. turret shell | |
"Pyrula paraensis" = Ficus paraensis
| |
| |
"Surcula (Pleurofusia) ? camposi" = Pleurofusia, "Pleurotoma barretti" = Polystira barretti
| |
Conus longesperatus n. sp.
Conus longesperatus n. sp. cone shell Close ally of: C. tortuosostriatus; internal mold and fragmentary imprint
| |
"Drillia consors" = Hindsiclava consors
"Drillia consors" = Hindsiclava consors Sowerby 1850 snail Subspecies: Drillia consors pennae; external mold
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Terebra derbyi n. sp., Terebra estaciana n. sp.
| |
Marginella estaciana n. sp., Marginella cereris n. sp.
Marginella cereris n. sp. margin shell |