Where: Tumbes, Peru (3.7° S, 80.7° W: paleocoordinates 4.9° S, 76.4° W)
• coordinate based on nearby landmark
• local area-level geographic resolution
When: Upper Member (Zorritos Formation), Early/Lower Miocene (23.0 - 16.0 Ma)
• Stated as Early Miocene by Spieker (1922) and corroborated by more recent publications (e.g. see Higley 2004). Overlies the late Oligocene-early Miocene Heath Fm and underlies the Cardalitos Fm in Higley (2004) although Spieker (1922) uses varying lithostratigraphic nomenclature suggesting a "Talara Fm" overlies the upper member of the Zorritos Fm. Its is not clear whether definitions of these members has changed since Spieker. The upper member of the Zorritos Fm is 200 ft thick and comprises mostly conglomerates and sandstones.
• member-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, sandy conglomerate and poorly lithified, yellow, conglomeratic sandstone
Size class: macrofossils
Reposited in the YPM
• Collected by J. Singewald, and with inspection of collections by E.T. Nelson (1870) at Yale University. Possibly also involved inspection of Grzybowski's material (Geol. Inst. of Cracow). Singewald's material is presumably reposited at Johns Hopkins.
Primary reference: E. M. Spieker. 1922. The Paleontology of the Zorritos Formation of the North Peruvian Oil Fields. The Johns Hopkins University Studies in Geology 3:1-196 [A. Miller/A. Hendy]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 58999: authorized by Austin Hendy, entered by Austin Hendy on 05.03.2006
Creative Commons license: CC BY (attribution)
Taxonomic list
Bivalvia | |
"Labiosa (Raeta) gardnerae" = Raeta gardnerae, "Labiosa (Raeta) gabbi" = Raeta gabbi
"Labiosa (Raeta) gardnerae" = Raeta gardnerae Spieker 1922 clam
"Labiosa (Raeta) gabbi" = Raeta gabbi Pilsbry and Johnson 1917 clam | |
"Chione (Chione) variabilis" = Chione (Chionopsis) variabilis, "Chione (Chione) angelana" = Chione (Chionopsis) angelana, "Clementia dariena" = Clementia (Clementia) dariena, "Pitaria (Lamelliconcha) cora" = Lamelliconcha cora
"Chione (Chione) variabilis" = Chione (Chionopsis) variabilis Nelson 1870 venus clam
"Chione (Chione) angelana" = Chione (Chionopsis) angelana Spieker 1922 venus clam
"Clementia dariena" = Clementia (Clementia) dariena Conrad 1855 venus clam
"Pitaria (Lamelliconcha) cora" = Lamelliconcha cora Brown and Pilsbry 1911 venus clam Subspecies: Pitaria (Lamelliconcha) cora aequicincta
| |
"Tellina (Eurytellina) aequicincta" = Eurytellina aequicincta
"Tellina (Eurytellina) aequicincta" = Eurytellina aequicincta Spieker 1922 tellin clam | |
"Corbula (Cuneocorbula) acutirostra" = Tenuicorbula acutirostra
"Corbula (Cuneocorbula) acutirostra" = Tenuicorbula acutirostra Spieker 1922 clam | |
"Arca (Anadara) toroensis" = Anadara (Grandiarca) chiriquiensis, "Arca (Scapharca) imporcata" = Anadara (Grandiarca) chiriquiensis, "Arca (Anadara) nelsoni" = Anadara (Grandiarca) chiriquiensis, "Arca (Scapharca) crescens" = Anadara (Grandiarca) chiriquiensis, "Arca (Scapharca) obesiformis" = Anadara (Grandiarca) chiriquiensis, "Arca (Anadara) septifera" = Anadara (Grandiarca) chiriquiensis
"Arca (Anadara) toroensis" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark Includes: A. (A.) toroensis crassa and A. (A.) toroensis prolata
"Arca (Scapharca) imporcata" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark
"Arca (Anadara) nelsoni" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark
"Arca (Scapharca) crescens" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark
"Arca (Scapharca) obesiformis" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark
"Arca (Anadara) septifera" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark | |
"Anomia berryi" = Anomia peruviana
"Anomia berryi" = Anomia peruviana d'Orbigny 1846 jingle | |
"Pecten woodringi" = Argopecten woodringi
"Pecten woodringi" = Argopecten woodringi Spieker 1922 calico scallop | |
Gastropoda | |
"Potamides ormei" = Potamides suprasulcatus
"Potamides ormei" = Potamides suprasulcatus Gabb 1873 horn snail Subspecies: Potamides ormei infraliratus
| |
Turritella bifasciata, "Turritella infracarinata" = Turritella (Turritella) infracarinata, Turritella robusta, Turritella inca, Turritella nelsoni, Turritella filicincta
Turritella bifasciata turret shell
"Turritella infracarinata" = Turritella (Turritella) infracarinata Grzybowski 1899 turret shell Includes: Turritella infracarinata zorritoensis
Turritella robusta Grzybowski 1899 turret shell
Turritella nelsoni Spieker 1922 turret shell Includes: Turritella nelsoni rotundata and T. nelsoni trullissatia
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Cerithium grillanum Spieker 1922 cerith snail
Cerithium infranodatum Spieker 1922 cerith snail | |
Conus cacuminatus Spieker 1922 cone shell |