Zone F - Canoa Formation (Pliocene of Ecuador)

Also known as Pecten Zone

Where: Manabi, Ecuador (0.2° N, 80.3° W: paleocoordinates 0.0° S, 79.5° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Canoa Formation, Pliocene (5.3 - 2.6 Ma)

• As exposed in the Quebrada Mangle section, the Canoa Formation has a thickness of around 125 feet, comprising Pliocene through Pleistocene marine and non-marine strata. The collection is from the basal Zone F (Loripes Zone), which has a thickness of around 1-2 ft.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; unlithified, blue, sandy claystone

• No environmental data reported. Presumably shallow water.
• Bluish, sandy clays, sparingly fossiliferous.

Size class: macrofossils

Collection methods: quarrying,

• Probably collected by current authors, though text also makes referal to faunal lists by Sheppard (1930) and a collecton of Barker.

Primary reference: H. A. Pilsbry and A.A. Olsson. 1941. A Pliocene fauna from Western Ecuador. Proceedings of the Natural Sciences of Philadelphia 93:1-79 [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51884: authorized by Austin Hendy, entered by Austin Hendy on 29.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for Mollusca; nomenclature probably outdated though accurate.
 Cidaroida - Cidaridae
Cidaris sp. Leske 1778 pencil urchin
 Balanomorpha - Coronulidae
Coronula sp. Bruguière 1792 whale barnacle
 Balanomorpha - Balanidae
Balanus sp. Da Costa 1778 barnacle
 Pectinida - Anomiidae
Placunanomia cumingii Broderip 1832 scallop
[entered as Placunanomia cumingi]
Anomia peruviana d'Orbigny 1846 jingle
 Pectinida - Pectinoidae
"Pecten ventricosus" = Argopecten ventricosus
"Pecten ventricosus" = Argopecten ventricosus Sowerby 1842 calico scallop
 Ostreida - Ostreidae
"Ostrea megodon" = Undulostrea megodon
"Ostrea megodon" = Undulostrea megodon Hanley 1846 oyster
 Cardiida - Veneridae
"Dosinia grandis" = Dosinia ponderosa
"Dosinia grandis" = Dosinia ponderosa Gray 1838 venus clam
 Hiatellida - Hiatellidae
"Panopaea cf. coquimbensis" = Panopea abbreviata
"Panopaea cf. coquimbensis" = Panopea abbreviata Valenciennes 1839 clam
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell