Cueva de Angostura [Angostura Fm]: Late/Upper Miocene, Ecuador

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Gastropoda - Turritellidae
Turritella (Bactrospira) altilira (Conrad 1857)
subspecies alitilira
Turritella prenuncia Spieker 1922
Turritella gatunensis Conrad 1857
Turritella matarucana Hodson 1926
Turritella (Broderiptella) mimetes (Brown and Pilsbry 1911)
Gastropoda - Vermetidae
Petaloconchus sculpturatus Lea 1846
Gastropoda - Neogastropoda - Olividae
Oliva (Ispidula) cueva
Olivella (Niteoliva) marksi Olsson 1956
Gastropoda - Neogastropoda - Olivellidae
Agaronia burchi
new species
Gastropoda - Neogastropoda - Muricidae
Murex (Murex) polynematicus (Brown and Pilsbry 1911)
recombined as Vokesimurex polynematicus
Gastropoda - Neogastropoda - Buccinidae
Cymatophos pilsbryi
new species
Perunassa ursa
new species
Hanetia (Solenosteira) dalli (Brown and Pilsbry 1911)
Northia (Northia) ecuadoriana
new species
Gastropoda - Neogastropoda - Nassariidae
Nassarius (Uzita) mastus
new species
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria (Hertleinia) angosturana Marks 1949
recombined as Hertleinia angosturana
Cancellaria (Euclia) maldonadoi Olsson 1964
recombined as Euclia maldonadoi
new species
Cancellaria (Pyruclia) telemba Olsson 1964
recombined as Pyruclia telemba
Gastropoda - Neogastropoda - Conidae
Conus riosantiagensis
new species
Conus boggsi Olsson 1964
new species
Conus angosturis Olsson 1964
new species
Gastropoda - Neogastropoda - Terebridae
Strioterebrum oresignus
new species
Strioterebrum telembiense
new species
Strioterebrum gatunensis (Toula 1908)
Terebra (Paraterebra) cembra Olsson 1964
recombined as Terebra (Oreoterebra) subsulcifera cembra
new species
Gastropoda - Cypraeidae
Siphocypraea (Muracypraea) henekeni (Sowerby 1850)
    = Muracypraea woodringi Landau and Groves 2011
Landau and Groves 2011
Gastropoda - Strombidae
Strombus sp. Linnaeus 1758
Gastropoda - Personidae
Distorsio (Rhysema) gatunensis Toula 1909
synonym of Distorsio decussata
Gastropoda - Naticidae
Stigmaulax kugleriana
new species
Gastropoda - Opisthobranchia - Cylichnidae
Acteocina cf. subbullata Pilsbry and Johnson 1917
synonym of Acteocina bullata
Gastropoda - Heterostropha - Architectonicidae
Architectonica (Architectonica) nobilis (Röding 1798)
original and current combination Architectonica nobilis
subspecies nobilis
Bivalvia - Nuculanida - Nuculanidae
Adrana aegra Olsson 1964
new species
Nuculana (Saccella) crassatelloides Olsson 1964
new species
Bivalvia - Carditida - Crassatellidae
Eucrassatella (Hybolophus) berryi (Spieker 1922)
subspecies telemba, new subspecies
Crassinella sp. Guppy 1874
Bivalvia - Lucinida - Lucinidae
Lucina (Lepilucina) gratis Olsson 1964
new species
Divaricella comis Olsson 1964
new species
Lucina (Lucinisca) arrogans
new species
Lucina (Callucina) quincula
spelled with current rank as Callucina
new species
Bivalvia - Pholadida - Corbulidae
Caryocorbula (Caryocorbula) prenasuta Olsson 1964
recombined as Caryocorbula prenasuta
new species
Caryocorbula (Hexacoraula) hexacyma (Brown and Pilsbry 1913)
recombined as Hexacorbula hexacyma
Bivalvia - Cardiida - Veneridae
Chione (Panchione) mactropsis (Conrad 1855)
recombined as Lirophora (Panchione) mactropsis
Bivalvia - Cardiida - Kelliellidae
Alveinus abundans Olsson 1964
synonym of Alveinus rotundus
new species
Bivalvia - Cardiida - Chamidae
Arcinella arcinella (Linnaeus 1767)
subspecies arcinella
Bivalvia - Cardiida - Cardiidae
Trigoniocardia (Americardia) stewarti
spelled with current rank as Americardia
new species
Trigoniocardia (Trigoniocardia) hannai (Olsson 1932)
Dinocardium (Exocardium) ecuadorialis (Olsson 1932)
recombined as Dinocardium ecuadoriale
Trachycardium (Trachycardium) dominicense (Gabb 1873)
recombined as Trachycardium (Dallocardia) dominicense
Bivalvia - Cardiida - Semelidae
Ervilia meridionalis
new species
Bivalvia - Mytilida - Crenellidae
Crenella ecuadoriana Pilsbry and Olsson 1941
synonym of Crenella decussata
subspecies santiaga, new subspecies
Bivalvia - Arcida - Noetiidae
Noetia (Noetia) ecuadoria
Bivalvia - Arcida - Arcidae
Anadara (Cunearca) boggsi Olsson 1964
new species
Anadara (Cunearca) hindsi (Olsson 1922)
Lunarca cueva
spelled with current rank as Anadara (Lunarca)
new species
Calloarca (Taeniarca) cachla Olsson 1964
new species
see common names

Geography
Country:Ecuador State/province:Esmeraldas
Coordinates: 1.1° North, 79.0° West (view map)
Paleocoordinates:0.7° North, 77.4° West
Basis of coordinate:based on political unit
Geographic resolution:outcrop
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 6
Key time interval:Late/Upper Miocene
Age range of interval:11.63000 - 5.33300 m.y. ago
Stratigraphy
Geological group:Santiago Formation:Angostura
Stratigraphic resolution:formation
Stratigraphy comments: Lowest of the Santiago Miocene section, lying transgressivlely unconformably on the Rio de Oro and Playa Rica shales. 150 meters in thickness
Lithology and environment
Primary lithology:coarse lithified sandstone
Secondary lithology: conglomerate
Includes fossils?Y
Lithology description: The Angostura formation is comprised primarily of coarse wsandstones and beds of conglomerates, about 150 meters in thickness. The formation is resistant to erosion and is largely barren, but at a few places there are lenses or interbeds filled with finely preserved fossils.
Environment:shallow subtidal indet.
Geology comments: Near-shore clastic sediments deposited along the inner shelf zone at depths of 100 fathoms or less.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:general faunal/floral analysis
Collection method comments: Faunal list observed from the fossils found in the roof of a small cave.
Metadata
Database number:60640
Authorizer:A. Miller, A. Hendy Enterer:K. Bulinski, A. Hendy
Modifier:A. Hendy Research group:marine invertebrate
Created:2006-05-19 08:27:46 Last modified:2012-08-25 22:30:44
Access level:the public Released:2006-05-19 08:27:46
Creative Commons license:CC BY
Reference information

Primary reference:
17422. A. A. Olsson. 1964. Neogene Mollusks From Northwestern Ecuador [A. Miller/K. Bulinski]

Secondary references:

43452 B. M. Landau and L. T. Groves. 2011. Cypraeidae (Mollusca: Gastropoda) from the early Miocene Cantaure Formation of northern Venezuela. Novaplex 12(1-2):1-38 [A. Hendy/A. Hendy]