PSst-1-RS (30-33 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 30-33 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 72118: 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 - Liotiidae
 Trochoidea - Trochidae
Halistylus columna Dall 1890 top snail
 Epitonioidea - Epitoniidae
"Epitonium (Epitonium) georgettina" = Epitonium georgettinum
"Epitonium (Epitonium) georgettina" = Epitonium georgettinum Kiener 1838 wentletrap
 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 - Planaxidae
 Cerithioidea - Scaliolidae
"Alabina cerithidioides" = Finella dubia
"Alabina cerithidioides" = Finella dubia d'Orbigny 1840 snail
[entered as Alabina cerithioides]
 Neogastropoda - Olividae
Olivella (Olivina) tehuelchana d'Orbigny 1841 olive snail
 Neogastropoda - Columbellidae
"Anachis (Costoanachis) obesa" = Parvanachis obesa, Anachis (Anachis) catenata, Anachis cf. isabellei, "Anachis (Costoanachis) avara" = Costoanachis avara
"Anachis (Costoanachis) obesa" = Parvanachis obesa Adams 1845 snail
"Anachis (Costoanachis) avara" = Costoanachis avara Say 1822 snail
 Neogastropoda - Drilliidae
"Drillia patagonica" = Spirotropis patagonica
"Drillia patagonica" = Spirotropis patagonica d'Orbigny 1841 snail
 Heterostropha - Pyramidellidae
Turbonilla (Pyrgiscus) "sp. A" Philippi 1841 snail
"Turbonilla (Pyrgiscus) interrupta" = Turbonilla interrupta Totten 1835 snail
Bivalvia
 Arcida - Arcidae
Anadara (Cunearca) brasiliana, "Anadara (Lunarca) ovalis" = Lunarca ovalis
"Anadara (Lunarca) ovalis" = Lunarca ovalis Bruguiere 1789 ark
 Pectinida - Pectinoidae
"Pecten (Chlamys) tehuelchus" = Aequipecten tehuelchus
"Pecten (Chlamys) tehuelchus" = Aequipecten tehuelchus d'Orbigny 1842 scallop
 Ostreida - Ostreidae
"Ostrea (Ostrea) puelchana" = Ostrea (Eostrea) puelchana
"Ostrea (Ostrea) puelchana" = Ostrea (Eostrea) puelchana d'Orbigny 1842 oyster
 Pholadida - Corbulidae
"Caryocorbula (Caryocorbula) caribaea" = Caryocorbula caribaea
"Caryocorbula (Caryocorbula) caribaea" = Caryocorbula caribaea d'Orbigny 1845 clam
 Cardiida - Veneridae
"Amiantis (Amiantis) purpurata" = Amiantis purpurata, "Pitar (Pitar) rostratum" = Pitar rostratus
"Amiantis (Amiantis) purpurata" = Amiantis purpurata Lamarck 1818 venus clam
"Pitar (Pitar) rostratum" = Pitar rostratus Koch 1943 venus clam
 Cardiida - Mactridae
"Mactra (Mactra) patagonica" = Mactra patagonica, "Mactra (Mactra) marplatensis" = Mactra marplatensis
"Mactra (Mactra) patagonica" = Mactra patagonica d'Orbigny 1846 clam
"Mactra (Mactra) marplatensis" = Mactra marplatensis Doello-Jurado 1918 clam
 Carditida - Crassatellidae
Crassinella maldonadoensis Pilsbry 1897 clam