Zone B (lower) - Jama Formation: Pliocene, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Heterostropha - Architectonicidae
Architectonica nobilis Röding 1798
Architectonica sexlinearis (Nelson 1870)
synonym of Architectonica nobilis
Gastropoda - Campanilidae
Cerithium stercusmuscarum Valenciennes 1833
recombined as Cerithium (Thericium) stercusmuscarum
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria (Cancellaria) yolandia n. sp. Pilsbry and Olsson 1941
recombined as Cancellaria yolandia
Cancellaria (Cancellaria) ventricosa
Cancellaria (Peruclia) bulbulus Sowerby 1832
recombined as Cancellaria (Pyruclia) bulbulus
Cancellaria (Peruclia) solida (Sowerby 1832)
recombined as Pyruclia solida
Cancellaria (Euclia) harpiformis n. sp. Pilsbry and Olsson 1941
Gastropoda - Neogastropoda - Conidae
Conus pyriformis Reeve 1843
Conus regularis Sowerby 1841
Conus cacuminatus Spieker 1922
Gastropoda - Neogastropoda - Terebridae
Terebra (Terebra) elena n. sp. Pilsbry and Olsson 1941
Terebra (Strioterebrum) cracilenta
original and current combination Strioterebrum
Terebra (Strioterebrum) cuenca n. sp. Pilsbry and Olsson 1941
Terebra (Strioterebrum) tumaca n. sp. Pilsbry and Olsson 1941
Gastropoda - Neogastropoda - Buccinidae
Hanetia cymioides n. sp. Pilsbry and Olsson 1941
Hanetia boggsi n. sp. Pilsbry and Olsson 1941
Hanetia ecuadorensis n. sp. Pilsbry and Olsson 1941
Cymatophos galerus Pilsbry and Olsson 1941
Nassa tinosa n. sp. Pilsbry and Olsson 1941
Metula amosi Vanatta 1913
Northia northiae (Gray in Griffith & Pidgeon 1833)
Phos cf. gaudens
Gastropoda - Neogastropoda - Nassariidae
Tritiaria ecuadoriana n. sp. Pilsbry and Olsson 1941
Nassa (Arcularia) puntablancoensis
spelled with current rank as Nassarius (Arcularia)
Gastropoda - Neogastropoda - Columbellidae
Strombina recurva (Sowerby 1832)
recombined as Strombina (Recurvina) recurva
Strombina ecuadoriana n. sp. Pilsbry and Olsson 1941
recombined as Strombina (Sinuina) ecuadoriana
Aesopus (Glyptaesopus) perornatus n. sp. Pilsbry and Olsson 1941
Gastropoda - Neogastropoda - Muricidae
Eupleura muriciformis (Broderip 1833)
Phyllonotus brassica
Gastropoda - Neogastropoda - Olividae
Olivella semistriata
Oliva angulata Lamarck 1811
synonym of Oliva (Oliva) incrassata
Oliva spicata Durham 1950
Gastropoda - Ficidae
Ficus ventricosus
Gastropoda - Bursidae
Bursa nana (Broderip and Sowerby 1829)
recombined as Marsupina nana
Gastropoda - Personidae
Distorsio decussatus (Valenciennes 1832)
recombined as Distorsio decussata
Gastropoda - Tonnidae
Malea ringens (Swainson 1822)
Gastropoda - Cassidae
Semicassis centiquadratus
Gastropoda - Cypraeidae
Cypraea cayapa n. sp. Pilsbry and Olsson 1941
recombined as Muracypraea cayapa
Gastropoda - Naticidae
Natica broderipana
Natica marochiensis (Gmelin 1791)
Polinices panamensis
Polinices rapulum
Gastropoda - Turritellidae
Turritella pasada n. sp. Pilsbry and Olsson 1941
Gastropoda - Pseudomelaniidae
Crassispira guayana n. sp. Pilsbry and Olsson 1941
Gastropoda - Neotaenioglossa - Calyptraeidae
Crucibulum (Dispotaea) imbricatum (Sowerby 1824)
recombined as Crucibulum (Dispotaea) imbricata
Crepidula sp. Lamarck 1799
Bivalvia - Arcida - Arcidae
Arca (Scapharca) obesa Sowerby 1833
recombined as Anadara obesa
Arca (Argina) brevifrons Sowerby I 1833
recombined as Lunarca brevifrons
Arca (Cunearca) aequitorialis
spelled with current rank as Anadara (Cunearca)
Arca (Cunearca) zorritoensis Spieker 1922
recombined as Anadara (Cunearca) zorritoensis
[entered as Arca (Cunearca) zorritensis]
Bivalvia - Arcida - Noetiidae
Noetia reversa (Sowerby 1833)
Subspecies: Noetia reversa peruviana; new subspecies
Bivalvia - Ostreida - Ostreidae
Ostrea megodon Hanley 1846
recombined as Undulostrea megodon
Bivalvia - Pectinida - Pectinidae
Pecten ventrcosus
Pecten nelsoni
Bivalvia - Pectinida - Anomiidae
Anomia peruviana d'Orbigny 1846
Placunanomia cumingii Broderip 1832
[entered as Placunanomia cumingi]
Bivalvia - Cardiida - Solecurtidae
Solecurtus broggii Pilsbry and Olsson 1941
Bivalvia - Cardiida - Semelidae
Semele laevis (Sowerby 1833)
Bivalvia - Cardiida - Tellinidae
Tellina (Macaliopsis) aequizonata n. sp. Pilsbry and Olsson 1941
Tellina (Eurytellina) panamanensis
Tellina (Eurytellina) prora (Hanley 1844)
Macoma plebeia
Bivalvia - Cardiida - Cardiidae
Cardium (Trigoniocardia) spiekeri Hanna and Israelsky 1925
recombined as Apiocardia spiekeri
Cardium (Trachycardium) ballenium n. sp. Pilsbry and Olsson 1941
Laevicardium pedernalense n. sp. Pilsbry and Olsson 1941
synonym of Laevicardium substriatum
Bivalvia - Cardiida - Mactridae
Harvella elegans (Sowerby 1825)
Subspecies: Harvella elegans tucilla
Mactra (Mactrella) alata (Spengler 1802)
recombined as Mactrellona alata
Mactra (Micromactra) atacama n. sp. Pilsbry and Olsson 1941
synonym of Mactrotoma angusta
Bivalvia - Cardiida - Anatinellidae
Labiosa undulata (Gould 1851)
recombined as Raeta undulata
Bivalvia - Cardiida - Veneridae
Chione (Chionopsis) jamaniana n. sp. Pilsbry and Olsson 1941
Chione (Lirophora) gorgona n. sp. Pilsbry and Olsson 1941
synonym of Lirophora mariae
Anomalocardia callistoides n. sp. Pilsbry and Olsson 1941
recombined as Iliochione callistoides
Cyclinella galera n. sp. Pilsbry and Olsson 1941
Clementia (Egesta) solida
Pitar salanga Pilsbry and Olsson 1941
Bivalvia - Pholadida - Corbulidae
Corbula ovulata Sowerby 1835
recombined as Caryocorbula ovulata
Bivalvia - Carditida - Crassatellidae
Eucrassatella gibbosa (Sowerby 1832)
recombined as Hybolophus gibbosus
Subspecies: Eucrassatella gibbosa tucilla
see common names

Geography
Country:Ecuador State/province:Manabi
Coordinates: 0.2° North, 80.3° West (view map)
Paleocoordinates:0.0° South, 79.5° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Pliocene
10 m.y. bin:Cenozoic 6
Key time interval:Pliocene
Age range of interval:5.33300 - 2.58000 m.y. ago
Stratigraphy
Formation:Jama
Local section:Puerto Jama Local bed:55 ft
Local order:bottom to top
Stratigraphic resolution:group of beds
Stratigraphy comments: Rests upon Miocene strata with a marked unconformity. Thickness is approximately 15 ft. Collection is from the lower part of Zone B.
Lithology and environment
Primary lithology:concretionary,blue poorly lithified sandstone
Includes fossils?Y
Lithology description: Bluish sands, somewhat lignitic in the upper part, nodular in the lower.
Environment:offshore
Geology comments: The lower part of this zone comprises mainly deeper water [offshore?] forms.
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
Database number:51886
Authorizer:A. Hendy Enterer:A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2005-06-29 11:12:39 Last modified:2013-11-25 13:37:23
Access level:group members Released:2006-06-29 11:12:39
Creative Commons license:CC BY
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]