Cist-1-RS (24-27 m) - Rio Grande do Sul (Holocene of Brazil)

Where: Brazil (32.2° S, 52.2° W: paleocoordinates 32.2° S, 52.2° 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 24-27 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 72125: 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.
Bivalvia
 Carditida - Crassatellidae
Crassinella maldonadoensis Pilsbry 1897 clam
 Pholadida - Corbulidae
"Caryocorbula (Caryocorbula) nasuta" = Caryocorbula nasuta
"Caryocorbula (Caryocorbula) nasuta" = Caryocorbula nasuta Sowerby 1833 clam
 Pholadida - Myidae
"Corbula iheringiana" = Sphenia iheringiana
"Corbula iheringiana" = Sphenia iheringiana Pilsbry 1897 softshell 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
Gastropoda
 Neogastropoda - Olividae
Olivella (Olivina) tehuelchana d'Orbigny 1841 olive snail
 Neogastropoda - Columbellidae
Anachis cf. isabellei, "Anachis (Costoanachis) avara" = Costoanachis avara
"Anachis (Costoanachis) avara" = Costoanachis avara Say 1822 snail
 Naticoidea - Naticidae
Tectonatica pusilla Say 1822 moon snail
 Truncatelloidea - Hydrobiidae
"Littoridina australis" = Heleobia australis
"Littoridina australis" = Heleobia australis d'Orbigny 1837 snail
 Heterostropha - Acteonidae
"Acteon punctostriata" = Japonactaeon punctostriata
"Acteon punctostriata" = Japonactaeon punctostriata Adams 1840 snail
 Pyramidelloidea - Pyramidellidae
"Turbonilla (Pyrgiscus) interrupta" = Turbonilla interrupta
"Turbonilla (Pyrgiscus) interrupta" = Turbonilla interrupta Totten 1835 snail