PSst-1-RS (42-45 m) - Rio Grande do Sul (Holocene of Brazil)

Where: Brazil (30.2° S, 50.5° W: paleocoordinates 30.2° S, 50.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Holocene (0.0 - 0.0 Ma)

• STRATIGRAPHIC RELATIONS: Unknown lithostratigraphic unit. THICKNESS: From drill hole of at least 45 m thick, from 3 m thick unit. AGE: Holocene, based of faunal similarity with Uruguan and Argentinian Holocene assemblages. STRATIGRAPHIC POSITION: From 42-45 m in drill hole.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified siliciclastic sediments

• ENVIRONMENT: Shallow siliciclastic marine environment.
• SPECIFIC LITHOLOGY: Unknown lithology, presumably from unlithified siliciclastic facies. LITHIFICATION: Presumably unlithified given age and figured specimens.

Size class: macrofossils

Collection methods: core,

• COLLECTOR: Petrobas Petroleum Company. REPOSITORY: Unknown repository, possibly the School of Geology, National Science Institute, Brazil.

Primary reference: I. R. da Silva Forti. 1969. Cenozoic Mollusks from the drillholes Cassino and Palmares do Sul of the Coastal Plain of Rio Grande do Sul. Iheringia Geologia 2:55-155 [A. Hendy/A. Hendy/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 72123: authorized by Austin Hendy, entered by Austin Hendy on 25.05.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda and bivalvia. Other groups not discussed. NOMENCLATURE: Authoritative publication with subgenus and species level designations, but nevertheless somewhat antiquated.
Gastropoda
 Trochoidea - Trochidae
Halistylus columna Dall 1890 top snail
 Neotaenioglossa - Calyptraeidae
Crepidula (Crepidula) protea, "Crepidula (Bostrycapulus) aculeata" = Bostrycapulus aculeatus
Crepidula (Crepidula) protea d'Orbigny 1941 slipper shell
"Crepidula (Bostrycapulus) aculeata" = Bostrycapulus aculeatus Gmelin 1791 slipper shell
 Cerithioidea - Scaliolidae
"Alabina cerithidioides" = Finella dubia
"Alabina cerithidioides" = Finella dubia d'Orbigny 1840 snail
[entered as Alabina cerithioides]
 Epitonioidea - Epitoniidae
"Epitonium (Epitonium) georgettina" = Epitonium georgettinum
"Epitonium (Epitonium) georgettina" = Epitonium georgettinum Kiener 1838 wentletrap
 Neogastropoda - Olividae
Olivella (Olivina) tehuelchana d'Orbigny 1841 olive snail
 Neogastropoda - Nassariidae
 Neogastropoda - Columbellidae
"Anachis (Alia) aff. fenestrata" = Columbellopsis nycteis, Anachis (Anachis) catenata, "Anachis (Costoanachis) avara" = Costoanachis avara
"Anachis (Alia) aff. fenestrata" = Columbellopsis nycteis Duclos 1846 snail
"Anachis (Costoanachis) avara" = Costoanachis avara Say 1822 snail
 Sorbeoconcha - Naticidae
Tectonatica pusilla Say 1822 moon snail
 Opisthobranchia - Cylichnidae
Acteocina candei d'Orbigny 1841 barrel-bubble
 Heterostropha - Pyramidellidae
"Odostomia (Chrysallida) seminuda" = Boonea seminuda, Turbonilla cf. atypha
"Odostomia (Chrysallida) seminuda" = Boonea seminuda Adams 1839 snail
Bivalvia
 Nuculida - Nuculidae
"Nucula (Nucula) semiornata" = Nucula (Lamellinucula) semiornata
"Nucula (Nucula) semiornata" = Nucula (Lamellinucula) semiornata d'Orbigny 1846 nut clam
 Carditida - Crassatellidae
Crassinella maldonadoensis Pilsbry 1897 clam
 Pholadida - Myidae
"Corbula iheringiana" = Sphenia iheringiana
"Corbula iheringiana" = Sphenia iheringiana Pilsbry 1897 softshell clam
 Cardiida - Veneridae
Clausinella gayi, "Protothaca antiqua" = Ameghinomya antiqua, Anomalocardia brasiliana, "Pitar (Pitar) rostratum" = Pitar rostratus
Clausinella gayi Húpe 1854 venus clam
"Protothaca antiqua" = Ameghinomya antiqua King 1832 venus clam
Anomalocardia brasiliana Gmelin 1792 venus clam
"Pitar (Pitar) rostratum" = Pitar rostratus Koch 1943 venus clam
 Cardiida - Mactridae
"Mactra (Mactra) patagonica" = Mactra patagonica
"Mactra (Mactra) patagonica" = Mactra patagonica d'Orbigny 1846 clam
 Arcida - Arcidae
 Pectinida - Pectinoidae
"Pecten (Chlamys) tehuelchus" = Aequipecten tehuelchus
"Pecten (Chlamys) tehuelchus" = Aequipecten tehuelchus d'Orbigny 1842 scallop