Telembi [Angostura Fm] (Miocene of Ecuador)

Where: Esmeraldas, Ecuador (0.8° N, 78.9° W: paleocoordinates 0.4° N, 77.3° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Angostura Formation (Santiago Group), Late/Upper Miocene (11.6 - 5.3 Ma)

• Lowest of the Santiago Miocene section, lying transgressivlely unconformably on the Rio de Oro and Playa Rica shales. 150 meters in thickness

• formation-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, coarse-grained sandstone and conglomerate

• Near-shore clastic sediments deposited along the inner shelf zone at depths of 100 fathoms or less.
• 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.

Size class: macrofossils

Collection methods: Faunal list observed from the fossils found in a fossiliferous lense interbedded with sandstones and conglomerates.

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

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 60662: authorized by Arnold Miller, entered by Kate Bulinski on 19.05.2006, edited by Austin Hendy

Creative Commons license: CC BY (attribution)

Taxonomic list

 Arcida - Arcidae
Anadara (Cunearca) telemba Olsson 1964 ark
new species
"Lunarca cueva" = Anadara (Lunarca) ark
new species
 Arcida - Noetiidae
 Carditida - Crassatellidae
Eucrassatella (Hybolophus) berryi Spieker 1922 clam
subspecies telemba, new subspecies
 Cardiida -
 Cardiida - Chamidae
Pseudochama sp. Odhner 1917 jewel box
 Cardiida - Kelliellidae
"Alveinus abundans" = Alveinus rotundus
"Alveinus abundans" = Alveinus rotundus Dall 1900 clam
new species
 Cardiida - Veneridae
"Chione (Lirophora) tembla" = Lirophora (Lirophora) falconensis Hodson et al. 1927 venus clam
new species
 Cardiida - Tellinidae
Eurytellina (Eurytellina) cayapa tellin clam
new species
 Cardiida - Semelidae
"Semele cf. costaricensis" = Semele laevis costaricensis, Ervilia meridionalis
"Semele cf. costaricensis" = Semele laevis costaricensis Olsson 1922 clam
Ervilia meridionalis clam
new species
 Cardiida - Cardiidae
 Lucinida - Lucinidae
"Lucina (Lucinisca) arrogans" = Lucinisca
"Lucina (Lucinisca) arrogans" = Lucinisca clam
new species
 Protobranchia - Nuculanidae
"Nuculana (Saccella) fabalis" = Saccella fabalis
"Nuculana (Saccella) fabalis" = Saccella fabalis Olsson 1964 pointed nut clam
new species
 Neogastropoda - Olividae
Oliva (Ispidula) cayapa olive snail
new species
Olivella (Niteoliva) marksi Olsson 1956 olive snail
Olivella (Olivella) telembiensis olive snail
new species
 Neogastropoda - Olivellidae
Agaronia burchi snail
new species
 Neogastropoda - Columbellidae
Strombina (Sincolo) harbisoniae, "Strombina (Strombina) striatocostata" = Strombina (Strombina) colinensis, Strombinella druidwilsoni, "Strombina (Strombina) pigea" = Sincola (Dorsina) pigea
"Strombina (Strombina) striatocostata" = Strombina (Strombina) colinensis Hodson 1931 snail
Strombinella druidwilsoni snail
new species
"Strombina (Strombina) pigea" = Sincola (Dorsina) pigea Olsson 1964 snail
new species
 Neogastropoda - Buccinidae
Strombinophos equadorianus true whelk
new species
Strombinophos telembus true whelk
new species
Perunassa ? ursa true whelk
new species
Northia (Northia) ecuadoriana true whelk
new species
Cymatophos pilsbryi true whelk
new species
Gemophos cayapus true whelk
new species
Hindsia dalli true whelk
new species
"Northia (Nicema) noctua" = Nicema true whelk
new species
 Neogastropoda - Nassariidae
Nassarius repetiti snail
new species
Nassarius (Uzita) mastus snail
new species
 Neogastropoda - Melongenidae
Melongena consors Sowerby 1850 snail
 Neogastropoda - Cancellariidae
"Cancellaria (Euclia) maldonadoi" = Euclia maldonadoi, Cancellaria (Euclia) fragosa, "Cancellaria (Pyruclia) telemba" = Pyruclia telemba, "Cancellaria (Pyruclia) pycta" = Pyruclia pycta, Cancellaria (Cancellaria) xenia, Cancellaria (Cancellaria) metuloides, Cancellaria (Massula) jadisi, "Cancellaria (Hertleinia) angosturana" = Hertleinia angosturana
"Cancellaria (Euclia) maldonadoi" = Euclia maldonadoi Olsson 1964 snail
new species
Cancellaria (Euclia) fragosa Olsson 1964 snail
new species
"Cancellaria (Pyruclia) telemba" = Pyruclia telemba Olsson 1964 snail
new species
"Cancellaria (Pyruclia) pycta" = Pyruclia pycta Olsson 1964 snail
new species
Cancellaria (Cancellaria) xenia Olsson 1964 snail
new species
Cancellaria (Cancellaria) metuloides Olsson 1964 snail
new species
Cancellaria (Massula) jadisi Olsson 1964 snail
new species
"Cancellaria (Hertleinia) angosturana" = Hertleinia angosturana Marks 1949 snail
 Neogastropoda - Mitridae
Mitra (Subcancilla) ecuadoriana Olsson 1964 mitre shell
new species
 Neogastropoda - Muricidae
Eupleura thompsoni Woodring 1959 murex snail
 Neogastropoda - Drilliidae
"Agladrillia lelandi" = Clathrodrillia lelandi
"Agladrillia lelandi" = Clathrodrillia lelandi Olsson 1964 snail
new species
 Neogastropoda - Turridae
Fusiturricula latira turrid
new species
Polystira andersoni turrid
new species
 Neogastropoda -
Glyphostoma katherinae snail
new species
 Neogastropoda - Conidae
Conus riosantiagensis cone shell
new species
Conus marksi cone shell
new species
 Neogastropoda - Terebridae
Strioterebrum telembiense auger snail
new species
Strioterebrum indocayapum Olsson 1964 auger snail
new species
Strioterebrum gatunensis Toula 1908 auger snail
"Terebra (Myurellina) subsulcifera" = Terebra (Oreoterebra) subsulcifera Brown and Pilsbry 1911 auger snail
"Terebra (Paraterebra) cf. robusta" = Terebra (Panaterebra) robusta Hinds 1844 auger snail
Hastula woodringi auger snail
new species
 Cypraeoidea - Cypraeidae
"Cypraea (Pseudozonaria) telembiensis" = Pseudozonaria telembiensis
"Cypraea (Pseudozonaria) telembiensis" = Pseudozonaria telembiensis Olsson 1964 cowry
new species
 Tonnoidea - Cassidae
Sconsia grayi Adams 1855 snail
subspecies gabbi
 Sorbeoconcha - Turritellidae
Turritella prenuncia Spieker 1922 turret shell
Turritella (Bactrospira) acosta Olsson 1964 turret shell
new species
Turritella gatunensis Conrad 1857 turret shell
Turritella (Broderiptella) bifastigata Nelson 1870 turret shell
 Architectonicoidea - Architectonicidae
"Architectonica (Architectonica) nobilis" = Architectonica nobilis, Architectonica (Pseudotorinia) eurybis
"Architectonica (Architectonica) nobilis" = Architectonica nobilis Röding 1798 sundial
subspecies nobilis
Architectonica (Pseudotorinia) eurybis Olsson 1964 snail
new species