Punta Pelada Formation (Oligocene of Costa Rica)

Where: Costa Rica (10.0° N, 84.6° W: paleocoordinates 8.5° N, 82.2° W)

• local area-level geographic resolution

When: Punta Pelada Formation, Late/Upper Oligocene (28.4 - 23.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Punta Pelada Fm, which unconformably overlies and is laterally equivalent to the Senosri Fm (Late Eocene-Early Miocene) and is unconformably overlain by the Uscari Fm (Early-Late Miocene). THICKNESS: From beds with section of no more than 25 m. AGE: Late Oligocene to Early Miocene. Placed in the Late Oligocene by enterer. STRATIGRAPHIC POSITION: From beds throughout section.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified sandstone and lithified limestone

• ENVIRONMENT: Shallow marine environment (50-80 m depth), influenced by currents and localized clastic input.
• SPECIFIC LITHOLOGY: Sandstones, conglomerates and limestone. LITHIFICATION: Lithified, based on figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collected by Aguilar

• COLLECTOR: T. Aguilar-Alvarez. REPOSITORY: Not stated, but presumably the Universidad de Costa Rica

Primary reference: T. Aguilar. 1999. Organismos de un arrecife fósil (Oligoceno Superior-Mioceno Inferior), del Caribe de Costa Rica. Revista de Biología Tropical 47(3) [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 77791: authorized by Austin Hendy, entered by Austin Hendy on 21.01.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Exhaustive for gastropoda bivalvia, and with representation by echinoderms, decapods, and foraminifera. NOMENCLATURE: Publication provides systematic descriptions, although these may not be considered authoritative. Many taxa not assigned to species or subgenus resolution.
Rotaliina
 Nummulitacea - Nummulitidae
Nummulites sp. Lamarck 1801
 Orbitoidacea - Lepidocyclinidae
Bivalvia
 Arcida - Arcidae
Anadara sp. Gray 1847 ark
 Arcida - Glycymerididae
Glycymeris sp. Da Costa 1778 clam
 Pectinida - Pectinoidae
Argopecten aff. levicostatus Toula 1909 calico scallop
 Ostreida - Gryphaeidae
Hyotissa aff. haitensis Sowerby 1850 oyster
 Ostreida - Ostreidae
Crassostrea sp. Sacco 1897 oyster
Ostrea sp. Linnaeus 1758 oyster
 Mytilida - Mytilidae
Lithophaga sp. Röding 1798 mussel
 Cardiida - Tellinidae
Gastropoda
 Architaenioglossa - Ampullinidae
 Neogastropoda - Olividae
Oliva sp. Bruguière 1789 olive snail
 Neogastropoda - Melongenidae
Melongena sp. Schumacher 1817 snail
 Neogastropoda - Fasciolariidae
Fasciolaria sp. Lamarck 1799 tulip snail
 Neogastropoda - Cancellariidae
Trigonostoma sp. Blainville 1827 snail
Cancellaria sp. Lamarck 1799 snail
 Neogastropoda - Mitridae
Mitra sp. Lamarck 1798 mitre shell
 Neogastropoda - Volutidae
Ctenilyria cf. ctenista Woodring 1964 volute
Voluta aff. alfaroi Dall 1912 volute
 Neogastropoda - Turbinellidae
"Xancus sp." = Turbinella
"Xancus sp." = Turbinella Lamarck 1799 snail
 Neogastropoda - Conidae
"Conus aff. symmetricus" = Purpuriconus symmetricus, Conus aff. bravoi
"Conus aff. symmetricus" = Purpuriconus symmetricus Sowerby 1849 cone shell
Conus aff. bravoi Spieker 1922 cone shell
 Naticoidea - Naticidae
 Cypraeoidea - Cypraeidae
Cypraea sp. Linnaeus 1758 cowry
 Calyptraeoidea - Calyptraeidae
Calyptraea (Calyptraea) sp. Lamarck 1799 slipper shell
Calyptraea (Trochita) trochiformis Gmelin 1791 slipper shell
 Turbinoidea - Turbinidae
"Astraea (Astralium) brevispina" = Astralium
"Astraea (Astralium) brevispina" = Astralium snail
SUBSPECIES: Astraea (Astralium) brevispina
Anthozoa
 Scleractinia - Siderastreidae
Siderastreidae indet. Vaughan and Wells 1943 stony coral
Siderastrea siderae stony coral
 Scleractinia - Pocilloporidae
Pocilloporidae indet. Gray 1842 stony coral
? Stylophora granulata Duncan 1864 stony coral
 Scleractinia - Faviidae
Faviidae indet. Gregory 1900 stony coral