Casa Saman [Saman Fm] (Eocene of Peru)

Where: Piura, Peru (4.8° S, 80.8° W: paleocoordinates 7.3° S, 73.6° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Saman Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• LITHOSTRATIGRAPHY: From the Saman Fm, which regionally overlies the Restin Fm of the Parinas Gp (Middle Eocene). AGE: Late Eocene (p. 9), on the basis of molluscan biostratigraphy. 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? STRATIGRAPHIC POSITION: From unknown position within formation.

• formation-level stratigraphic resolution

Environment/lithology: coastal; poorly lithified, fine-grained, argillaceous sandstone and poorly lithified conglomerate

• Appears to be shelfal siliciclastic environment judging from faunal composition.
• Sandstone and conglomerates, becoming more argillaceous and fine-grained towards the top. Judged to be at best poorly lithified from figured specimens. All specimens have matrix remaining in apertures, suggesting some lithification, but none remain unsegregated from hand specimens or slabs of rock, suggesting that they are somewhat unlithified.

Size class: macrofossils

Collection methods: quarrying,

• No museum repositories are reported, but material my 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 52523: authorized by Austin Hendy, entered by Austin Hendy on 10.08.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Mollusca.
 Arcida - Arcidae
"Arca (Argina) sullanensis" = Arginopsis sullanensis, "Arca (Argina) samanensis" = Arginella samanensis
"Arca (Argina) sullanensis" = Arginopsis sullanensis Woods 1922 clam
"Arca (Argina) samanensis" = Arginella samanensis Olsson 1929 clam
 Ostreida - Ostreidae
Ostrea samanensis n. sp. Olsson 1928 oyster
 Ostreida - Pteriidae
Pteria sp. Scopoli 1777 pearl oyster
 Mytilida - Mytilidae
Mytilus sp. Linnaeus 1758 mussel
 Carditida - Carditidae
"Venericardia planicosta" = Venericor planicosta
"Venericardia planicosta" = Venericor planicosta Lamarck 1801 clam
SUBSPECIES: Venericardia planicosta samanensis
 Pholadida - Raetomyidae
Amotapus arbolensis Woods 1922 clam
 Pholadida - Corbulidae
"Corbula tangara n. sp." = Juliacorbula tangara
"Corbula tangara n. sp." = Juliacorbula tangara Olsson 1928 clam
 Cardiida - Mactridae
"Spisula (Oxyperas) callistoides" = Oxyperas callistoides
"Spisula (Oxyperas) callistoides" = Oxyperas callistoides Olsson 1928 clam
 Cardiida - Veneridae
"Pitaria (Lamelliconcha) samanensis n. sp." = Lamelliconcha samanensis, Macrocallista inca n. sp., "Clementia peruviana" = Clementia (Egesta) peruviana
"Pitaria (Lamelliconcha) samanensis n. sp." = Lamelliconcha samanensis Olsson 1928 venus clam
Macrocallista inca n. sp. Olsson 1928 venus clam
"Clementia peruviana" = Clementia (Egesta) peruviana Olsson 1928 venus clam
 Cardiida - Tellinidae
Tellina sp. Linnaeus 1758 tellin clam
 Cardiida - Cardiidae
"Cardium (Trigoniocardia) samanicum n. sp." = Trigoniocardia (Trigoniocardia) samanicum
"Cardium (Trigoniocardia) samanicum n. sp." = Trigoniocardia (Trigoniocardia) samanicum Olsson 1928 cockle
 Solenida - Solenidae
Solen sp. Linnaeus 1758 clam
 Lucinida - Lucinidae
"Phacoides (Miltha) patensis" = Miltha
"Phacoides (Miltha) patensis" = Miltha clam
 Architaenioglossa - Ampullinidae
Ampullina ortoni Gabb 1870 snail
 Neogastropoda - Olivellidae
Agaronia inca n. sp. snail
 Neogastropoda - Buccinidae
"Tritonidea staufti n. sp." = Cominella staufti Olsson 1928 true whelk
Dorsanum lagunitensis Woods 1922 true whelk
Pseudoliva parinaensis true whelk
Subspecies: Pseudoliva parinaensis samanica
Pseudoliva coronaria Olsson 1930 true whelk
 Neogastropoda - Melongenidae
"Melongena (Pugilina) aedicnema n. sp." = Pugilina aedicnema, "Melongena (Cornulina) laevifusoides n. sp." = Cornulina
"Melongena (Pugilina) aedicnema n. sp." = Pugilina aedicnema Olsson 1928 snail
"Melongena (Cornulina) laevifusoides n. sp." = Cornulina snail
 Neogastropoda - Fasciolariidae
"Peruficus lagunitensis" = Glyptostyla lagunitensis, Mancorus grabaui
"Peruficus lagunitensis" = Glyptostyla lagunitensis Olsson 1929 snail
Mancorus grabaui Olsson 1931 snail
 Neogastropoda - Volutidae
"Voluta (Peruluta) mancorensis n. sp." = Peruluta mancorensis
"Voluta (Peruluta) mancorensis n. sp." = Peruluta mancorensis Olsson 1928 volute
 Neogastropoda - Turbinellidae
Xancus peruvianus Olsson 1928 snail
 Neogastropoda - Conidae
"Conus chiraensis" = Conus sauridens chiraensis
"Conus chiraensis" = Conus sauridens chiraensis Olsson 1930 cone shell
 Stromboidea - Strombidae
Ectinochilus gaudichaudi d'Orbigny 1842 true conch
 Naticoidea - Naticidae
"Polinices (Neverita) samanensis n. sp." = Neverita samanensis
"Polinices (Neverita) samanensis n. sp." = Neverita samanensis Olsson 1928 moon snail
 Calyptraeoidea - Calyptraeidae
Calyptraea saxosa n. sp. slipper shell
Typo: "Claytraea saxosa"
Crepidula sp. Lamarck 1799 slipper shell
 Sorbeoconcha - Potamididae
? Telescopium samanense n. sp. Olsson 1928 horn snail
 Sorbeoconcha - Turritellidae
Turritella boughtoni n. sp. Olsson 1928 turret shell
Turritella chira n. sp. Olsson 1928 turret shell
Turritella samanensis n. sp. Olsson 1928 turret shell
 Sorbeoconcha - Cerithiidae
"Cerithium (Iddingsia) laeviusculum" = Iddingsella laeviusculum
"Cerithium (Iddingsia) laeviusculum" = Iddingsella laeviusculum Gabb 1869 cerith snail
 Architectonicoidea - Architectonicidae
Architectonica sullana n. sp. Olsson 1928 sundial
 Nautilida - Aturiidae
Aturia peruviana Olsson 1928 nautiloid
SUBSPECIES: Aturia alabamensis peruviana