Estacao Agronomica [Estacao Limestone]: Early/Lower Miocene, Brazil

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gymnolaemata - Cheilostomata - Lunulitidae
Lunulites pileolus
Bivalvia - Arcida - Glycymerididae
Glycymeris bineminis
Partial internal mold and external imprint
Glycymeris cf. eumita Maury 1924
Bivalvia - Arcida - Arcidae
Scapharca ? melloi Maury 1924
recombined as Scapharca (Cunearca) melloi
Closely related member of A. transversa group
Scapharca agronomica n. sp.
Scapharca recondita n. sp.
Recalls: A. incile, but not Noetia; internal moold
Scapharca agraria n. sp.
Bivalvia - Pectinida - Pectinidae
Pecten cererideditus n. sp.
Recalls: P. coccymelus (Mio., MD)
Bivalvia - Pectinida - Plicatulidae
Plicatula eroessa n. sp.
Bivalvia - Carditida - Carditidae
Venericardia agriculturae n. sp.
Venericardia amazoniana n. sp.
Bivalvia - Lucinida - Lucinidae
Lucina frugalis n. sp.
Resembles: L. dartoni (Eoc., MD)
Bivalvia - Pholadida - Corbulidae
Corbula agricolae n. sp.
Very rostrate
Corbula vertumni n. sp.
Very rostrate
Bivalvia - Cardiida - Cardiidae
Cardium (Fragum) estacianum n. sp.
original and current combination Fragum
Cardium (Trachycardium) hortensium n. sp.
original and current combination Trachycardium
Cardium (Trachycardium) viridarii n. sp.
original and current combination Trachycardium
Bivalvia - Cardiida - Solecurtidae
Psammosolen cereris n. sp. Maury 1924
recombined as Solecurtus cereris
Not unlike P. cumingianus and P. sanctidominici
Bivalvia - Cardiida - Veneridae
Antigona proserpinae n. sp.
Similar in sculpture to A. sanctaenoctis; several internal molds and some external imprints
Chione agraria White 1887
recombined as Chione (Lirophora) agraria
Pitaria vertumni n. sp. Maury 1924
recombined as Pitar (Lamelliconcha) vertumni
Bivalvia - Cardiida - Chamidae
Echinochama pristina Maury 1924
Several imprints and an internal mold
Chama agronomica n. sp.
Bivalvia - Nuculanida - Nuculanidae
Leda (Adrana) agronomica n. sp. Maury 1924
recombined as Adrana agronomica
Similar to L. (A.) aldrichiana; frail single specimen, apparently crumbled during illustration
Gastropoda - Trochidae
Solarium eudaidelum
spelled with current rank as Trochus (Solarium)
Calliostoma (Eutrochus) derbyi Maury 1924
partial imprint of shell
Calliostoma retectum Maury 1924
very perfect external mold
Gastropoda - Heterostropha - Architectonicidae
Solarium intraornatum White 1887
synonym of Architectonica nobilis
Gastropoda - Turritellidae
Turritella agronomica n. sp.
Close to: T. meunieri
Turritella callizona n. sp.
Gastropoda - Ficidae
Pyrula paraensis White 1887
recombined as Ficus paraensis
externa mold
Gastropoda - Cypraeidae
Cypraea pennae (White 1887)
original and current combination Cypraeactaeon pennai
fragmentary mold
Gastropoda - Neogastropoda - Turridae
Surcula (Pleurofusia) ? camposi
spelled with current rank as Pleurofusia
fragmentary external mold
Turris albida (Perry 1811)
molds
    = Pleurotoma barretti Guppy 1866
Hendy et al. 2008
recombined as Polystira barretti
Gastropoda - Neogastropoda - Conidae
Conus longesperatus n. sp.
Close ally of: C. tortuosostriatus; internal mold and fragmentary imprint
Gastropoda - Neogastropoda - Drilliidae
Drillia consors (Sowerby 1850)
recombined as Hindsiclava consors
Subspecies: Drillia consors pennae; external mold
Gastropoda - Neogastropoda - Terebridae
Terebra derbyi n. sp.
Recalls form of: T. circinata and T. serotina
Terebra estaciana n. sp.
Resembles: T. denotans
Gastropoda - Neogastropoda - Marginellidae
Marginella estaciana n. sp.
external mold
Marginella cereris n. sp.
see common names

Geography
Country:Brazil State/province:Para
Coordinates: 1.0° South, 48.0° West (view map)
Paleocoordinates:1.0° South, 43.9° West
Basis of coordinate:based on nearby landmark
Altitude:1 meters
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Early/Lower Miocene
Age range of interval:23.03000 - 15.98000 m.y. ago
Stratigraphy
Formation:Pirabas Member:Estacao Limestone
Stratigraphic resolution:member
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:fine,shelly/skeletal,gray lithified calcareous "limestone"
Includes fossils?Y
Lithology description: Fine-grained, generally grayish limestone, composed of finely ground sediments, including imperfectly preserved molluscan shells and bryozoan colonies. The limestone is highly calcareous.
Environment:carbonate indet.
Geology comments: No environmental data reported.
Taphonomy
Modes of preservation:body,cast,mold/impression
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: 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.
Taxonomic list comments:Fairly lengthy list, but possibly not exhaustive given the quality of the fauna. The nomenclature is antiquated, though has species-resolution assignments; identifications by Maury who had extensive knowledge of circum-Caribbean faunas.
Metadata
Database number:60980
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-05-28 21:45:36 Last modified:2013-11-25 13:37:23
Access level:the public Released:2006-05-28 21:45:36
Creative Commons license:CC BY
Reference information

Primary reference:
17560. C. J. Maury. 1924. Fosseis Terciarios Do Brazil. Servico Geologico E Mineralogico Do Brazil Monographia 49 [A. Miller/A. Hendy/P. Wagner]

Secondary references:

19909 A. J. W. Hendy, D. P. Buick, K. V. Bulinski, C. A. Ferguson, and A. I. Miller. 2008. Unpublished census data from Atlantic coastal plain and circum-Caribbean Neogene assemblages and taxonomic opinions. [A. Hendy/A. Hendy/A. Hendy]