Lomitos Cgl, Talara Fm - Salina area, Peru (Eocene of Peru)

Where: Piura, Peru (5.9° S, 80.6° W: paleocoordinates 8.5° S, 72.8° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Talara Shale Member (Talara Formation), Bartonian (41.3 - 38.0 Ma)

• Regarded as lower Upper Eocene on the basis of faunal similarity. Foraminifera suggest an upper Eocene age. Olsson states that the Talara and Saman rocks can be referred to the Upper Eocene and in terms of the European section, to the Bartonian and Ludian.....respectively? In most places the Talara Formation can be divided into three members, a lower shale (Talara Shale), a middle sandstone (Talara Sandstone), and an upper shale (Pozo Shale). In a complete section the Talara Formation has an average thickness of about 2800 ft. The collection is derived from a sandy basal layer known as the Lomitos Conglomerate in the Talara Shale member, which can reach a thickness of 400 ft or more.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, yellow sandstone

• Appears to be shelfal siliciclastic environment judging from faunal composition.
• Yellow sandstone.

Size class: macrofossils

Collection methods: quarrying,

• No museum repositories are reported, but material may presumably be the AMNH of PRI collections. Because of uncertaintly this field is left ommited.

Primary reference: A. A. Olsson. 1930. Contributions to the Tertiary Paleontology of Northern Peru: Part 3, Eocene Mollusca. Bulletins of American Paleontology 17(62):1-164 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 52527: authorized by Austin Hendy, entered by Austin Hendy on 10.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Mollusca.
Rhynchonellata
 Terebratulida - Terebratulidae
Bivalvia
 Pectinida - Anomiidae
Anomia sp. Linnaeus 1758 jingle
 Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758 mussel
 Pholadida - Raetomyidae
 Pholadida - Corbulidae
"Corbula boggsi" = Juliacorbula boggsi, "Corbula salina" = Caryocorbula salina
"Corbula boggsi" = Juliacorbula boggsi Olsson 1928 clam
"Corbula salina" = Caryocorbula salina Olsson 1928 clam
 Pholadida - Pholadidae
Martesia sp. Sowerby 1824 clam
 Cardiida - Mactridae
? Mactra sp. Linnaeus 1767 clam
 Cardiida - Veneridae
"Pitaria (Lamelliconcha) salsola" = Lamelliconcha hillii, "Clementia peruviana" = Clementia (Egesta) peruviana
"Pitaria (Lamelliconcha) salsola" = Lamelliconcha hillii Dall 1895 venus clam
"Clementia peruviana" = Clementia (Egesta) peruviana Olsson 1928 venus clam
 Solenida - Pharidae
Ensis sp. Schumacher 1817 clam
Gastropoda
 Ptenoglossa - Epitoniidae
Epitonium (Acrilla) peruvianum Olsson 1928 wentletrap
 Neogastropoda - Olivellidae
Agaronia inca n. sp. snail
 Neogastropoda - Buccinidae
Pseudoliva modesta Olsson 1928 true whelk
"Dorsanum lagunitensis" = Nassa lagunitensis Woods 1922 true whelk
 Neogastropoda - Nassariidae
"Tritiaria salina" = Nassarius (Tritiaria) snail
Tritiaria terebratula Olsson 1928 snail
 Neogastropoda - Strepsiduridae
Ancillarina pananga n. sp. snail
 Neogastropoda - Volutidae
Peruluta peruviana Douvillé 1921 volute
Subspecies: Peruluta peruviana samanica
 Neogastropoda - Drilliidae
 Neogastropoda - Raphitomidae
 Neogastropoda - Terebridae
Terebra negritensis n. sp. Olsson 1930 auger snail
 Stromboidea - Strombidae
Ectinochilus gaudichaudi d'Orbigny 1842 true conch
Subspecies: Ectinochilus gaudichaudi alauda
 Ficoidea - Ficidae
Ficus otaria fig shell
 Naticoidea - Naticidae
Natica (Natica) peruviana Olsson 1928 moon snail
 Cypraeoidea - Eocypraeidae
"Amphiperas negritensis" = Sphaerocypraea negritensis
"Amphiperas negritensis" = Sphaerocypraea negritensis Olsson 1928 snail
 Tonnoidea - Cassidae
"? Sconsia samanica" = Doliocassis samanica
"? Sconsia samanica" = Doliocassis samanica Olsson 1928 snail
 Sorbeoconcha - Turritellidae
Turritella chira Olsson 1928 turret shell
Turritella samanensis Olsson 1928 turret shell
 Architectonicoidea - Architectonicidae
Architectonica sullana Olsson 1928 sundial
Cephalopoda
 Nautilida - Aturiidae
Aturia alabamensis Morton 1834 nautiloid
Subspecies: Aturia alabamensis peruviana