Esperanza, Atlantico (Miocene of Colombia)

Where: Bolivar, Colombia (10.4° N, 75.5° W: paleocoordinates 9.8° N, 72.9° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Middle Miocene (16.0 - 11.6 Ma)

• Middle Miocene age based on correlation with other Caribbean fossil assemblages and by stratigraphic relations. Thickness in the Zambrano-Carmen section may be as much as 5,000 ft. Fossils are stratigraphically lower than those from Jesus del Monte.

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified sandstone

• No paleonenvironmental data reported, though from apparently from shallow-water siliciclastic sediments. Rocks dip to the SE monoclinally away from the older sediments forming the folds of the central range of hills. From strike ridge of sandstone.
• Sandstone. Unlithified based on observation of figured specimens.

Size class: macrofossils

Reposited in the PRI

• Collections reposited at Cornell University (now PRI collections). Many collections collected by C.C. Anderson.

Primary reference: N.E. Weisbord. 1929. Miocene Mollusca of Northern Colombia. Bulletin of American Paleontology 14(54):1-310 [A. Miller/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 60687: authorized by Austin Hendy, entered by Austin Hendy on 20.05.2006

Creative Commons license: CC BY (attribution)

Taxonomic list

• Some lists appear exhaustive, though in cases nomenclature is antiquated, though at species resolution.
Bivalvia
 Arcida - Arcidae
"Scapharca chiriquiensis" = Anadara (Grandiarca) chiriquiensis
"Scapharca chiriquiensis" = Anadara (Grandiarca) chiriquiensis Gabb 1861 ark
Subspecies: S. chiriquiensis bolivari
 Pholadida - Corbulidae
"Corbula (Cuneocorbula) hexacyma" = Hexacorbula hexacyma
"Corbula (Cuneocorbula) hexacyma" = Hexacorbula hexacyma Brown and Pilsbry 1913 clam
Gastropoda
 Neogastropoda - Melongenidae
"Melongena colombiana" = Torquifer colombiana
"Melongena colombiana" = Torquifer colombiana Weisbord 1929 snail
 Neogastropoda - Mitridae
"Mitra colombiana" = Subcancilla colombiana
"Mitra colombiana" = Subcancilla colombiana Weisbord 1929 mitre shell
 Neogastropoda - Turridae
"Pleurotoma barretti" = Polystira barretti
"Pleurotoma barretti" = Polystira barretti Guppy 1866 turrid
Subspecies: T. albida barretti=Polystira
 Tonnoidea - Personidae
"Distorsio cf. simillimus" = Distorsio simillima
"Distorsio cf. simillimus" = Distorsio simillima Sowerby 1850 snail
 Sorbeoconcha - Potamididae
"Potamides (Pyrazisinus) bolivarensis" = Terebralia dentilabris, "Potamides (Lampanella) ormei" = Potamides suprasulcatus
"Potamides (Pyrazisinus) bolivarensis" = Terebralia dentilabris Gabb 1873 horn snail
"Potamides (Lampanella) ormei" = Potamides suprasulcatus Gabb 1873 horn snail
 Sorbeoconcha - Turritellidae
Turritella cf. gatunensis Conrad 1857 turret shell
"Turritella supraconcava" = Turritella abrupta Spieker 1922 turret shell
 Architectonicoidea - Architectonicidae
"Architectonica granulatum" = Architectonica nobilis
"Architectonica granulatum" = Architectonica nobilis Röding 1798 sundial