Zone H - Canoa Formation: Piacenzian, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia - Nuculida - Nuculidae
Nucula sp. Lamarck 1799
Nucula exigua Sowerby 1833
Nucula declivis Hinds 1843
Bivalvia - Nuculanida - Nuculanidae
Nuculana eburnea (Sowerby 1833)
Nuculana elenensis (Sowerby I 1833)
SUBSPECIES: N. elenensis pyriformis
Bivalvia - Lucinida - Lucinidae
Bivalvia - Cardiida - Cardiidae
Laevicardium elenense (Sowerby 1840)
[entered as Laevicardium elenensis]
Bivalvia - Cardiida - Tellinidae
Macoma grandis (Hanley 1844)
Macoma lamproleuca (Pilsbry and Lowe 1932)
Macoma (Macoploma) ecuadoriana n. sp. Pilsbry and Olsson 1941
Bivalvia - Cardiida - Veneridae
Dosinia grandis Nelson 1870
Chione (Lirophora) mariae (d'Orbigny 1846)
Bivalvia - Arcida - Arcidae
Bivalvia - Pectinida - Pectinidae
Pecten ventricosus Sowerby 1842
Bivalvia - Pectinida - Anomiidae
Anomia peruviana d'Orbigny 1846
Placunanomia cumingii Broderip 1832
[entered as Placunanomia cumingi]
Gastropoda - Eulimidae
Gastropoda - Epitoniidae
Gastropoda - Tornidae
Gastropoda - Neogastropoda - Cancellariidae
SUBSPECIES: C. (C.). obesa schucherti
Gastropoda - Neogastropoda - Marginellidae
Marginella minor Jousseaume 1877
Gastropoda - Neogastropoda - Drilliidae
Gastropoda - Neogastropoda - Terebridae
Gastropoda - Neogastropoda - Clathurellidae
Gastropoda - Neogastropoda - Mangeliidae
Gastropoda - Neogastropoda - Olividae
Olivella gracilis (Broderip and Sowerby 1829)
Gastropoda - Neogastropoda - Buccinidae
Gastropoda - Neogastropoda - Columbellidae
Strombina gibberula (Sowerby 1832)
Gastropoda - Neogastropoda - Nassariidae
Gastropoda - Naticidae
Natica elenae Récluz 1844
Natica broderipiana Récluz 1844
Gastropoda - Opisthobranchiata - Cylichnidae
Gastropoda - Heterostropha - Pyramidellidae
Scaphopoda - Dentaliida - Dentaliidae
see common names

Geography
Country:Ecuador State/province:Manabi
Coordinates: 0.2° North, 80.3° West (view map)
Paleocoordinates:0.5° North, 79.5° West (Wright 2013)
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Neogene Epoch: Pliocene
Stage: Piacenzian 10 m.y. bin: Cenozoic 6
Key time interval: Piacenzian
Age range of interval: 3.6 - 2.58 m.y. ago
Stratigraphy
Formation:Canoa
Local section:Quebrada Mangle Local bed:69 ft
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: 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 H (Loripes Zone), which has a thickness of around 15 ft.
Lithology and environment
Primary lithology:shelly/skeletal,blue unlithified sandy claystone
Includes fossils?Y
Lithology description: Very fossiliferous, blue sandy clays. Many fossils.
Environment:coastal indet.
Geology comments: No environmental data reported. Presumably shallow water.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:selective quarrying,field collection
Reason for describing collection:taxonomic analysis
Collection method comments: Probably collected by current authors, though text also makes referal to faunal lists by Sheppard (1930) and a collecton of Barker.
Taxonomic list comments:Exhaustive for Mollusca; nomenclature probably outdated though accurate.
Metadata
Also known as:Loripes Zone
Database number:51880
Authorizer:A. Hendy, A. Miller Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2005-06-29 08:17:03 Last modified:2025-02-22 15:12:02
Access level:group members Released:2006-06-29 08:17:03
Creative Commons license:CC0
Reference information

Primary reference:
13814. 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]