USGS 18837, Barro Colorado Island (Oligocene of Panama)

Also known as Location 42d; field #207

Where: Panama (9.2° N, 79.9° W: paleocoordinates 7.7° N, 77.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Bohio Formation, Chattian (28.1 - 23.0 Ma)

• The Bohio Formation overlies the Gatuncillo Formation conformably in most areas, although may lap onto the Gauncillo Formation or basement. The thickness of the formation is about 75 metres to as much as 450 metres. Smaller foraminifera from the basal part of the formation yielded a early Oligocene age. The upper part of the formation, from which the collections are derived yields larger foraminifera of late Oligocene age.

• bed-level stratigraphic resolution

Environment/lithology: shoreface; lithified, medium-grained, calcareous sandstone

• No paleoenvironmental data reported, but given that these collections originate from marine tongues/wedges, they are likely to be shallow water. Other localities contain mixed marine, brackish, and freshwater taxa.
• Listed as "calcareous, medium-grained subgreywacke"

Size class: macrofossils

Reposited in the USNM

Collection methods: quarrying,

• Collected by Woodring (1954). Material is also held (but not specified for any specific collection) at Stanford University, Acad. Nat. Sci. Phil., Corenell University, PRI, U. Cal. and Cal. Acad. Sci.

Primary reference: W. P. Woodring. 1957. Geology and Paleontology of Canal Zone and adjoining parts of Panama. United States Geological Survey Professional Paper 306(A) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 42558: authorized by Austin Hendy, entered by Austin Hendy on 02.08.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda.
 Arcida - Arcidae
Anadara (Rasia) lita3 Woodring 1973 ark
 Pectinida - Pectinoidae
Flabellipecten antiguensis4 Brown 1913 scallop
 Pectinida - Anomiidae
"Anomia cf. peruviana" = Anomia (Anomia) peruviana4
"Anomia cf. peruviana" = Anomia (Anomia) peruviana4 d'Orbigny 1846 jingle
Subspecies: Anomia peruviana gabbi
 Pholadida - Corbulidae
Caryocorbula platys4 Woodring 1982 clam
 Cardiida - Ungulinidae
 Cardiida - Veneridae
Chione (Chionopsis) posorjensis4 Olsson 1931 venus clam
Dosinia (Dosinia) aff. delicatissima4 Brown and Pilsbry 1913 venus clam
"Macrocallista (Paradione) maculata" = Macrocallista maculata4 Linnaeus 1758 venus clam
Pleiorytis orthra4 Woodring 1982 venus clam
 Cardiida - Solecurtidae
Solecurtus vicksburgensis4 Aldrich 1885 clam
 Cardiida - Tellinidae
Tellina sp.4 Linnaeus 1758 tellin clam
Tellina (Tellinella) protera4 Woodring 1982 tellin clam
 Cardiida - Psammobiidae
Gari (Gobraeus) listrota4 Woodring 1982 clam
Subspecies: Gari (Gobraeus) listrota listrota
 Cardiida - Semelidae
"Semele cf. venusta" = Semele (Amphidesma) venusta4
"Semele cf. venusta" = Semele (Amphidesma) venusta4 Reeve 1853 clam
 Cardiida - Cardiidae
 Thraciida - Thraciidae
? Cyathodonta dolicha4 Woodring 1982 clam
 Lucinida - Lucinidae
Lucinisca protista4 Woodring 1982 clam
Miltha sp.4 Adams and Adams 1857 clam
 Protobranchia - Nuculanidae
Adrana stena3 Woodring 1973 pointed nut clam
 Opisthobranchia - Cylichnidae
Acteocina cf. bullata2 Kiener 1834 barrel-bubble
 Opisthobranchia - Haminoeidae
 Architaenioglossa - Ampullinidae
 Neogastropoda - Olividae
Olividae indet.2 Latreille 1825 olive snail
 Neogastropoda - Columbellidae
Mitrella epacta2 Woodring 1964 snail
 Neogastropoda - Buccinidae
? Antillophos sp.2 Woodring 1928 true whelk
 Neogastropoda - Mitridae
Mitra (Tiara) sp.2 Swainson 1831 mitre shell
 Neogastropoda - Marginellidae
Marginella (Eratoidea) aff. mollitor2 Dall 1915 margin shell
 Neogastropoda - Muricidae
Muricidae indet.1 Rafinesque 1815 murex snail
 Neogastropoda - Drilliidae
"? Drillia (? Neodrillia) sp." = Neodrillia2
"? Drillia (? Neodrillia) sp." = Neodrillia2 Bartsch 1943 snail
 Neogastropoda - Conidae
Conus aff. chipolanus2 Dall 1896 cone shell
Conus cf. sulculus2 Dall 1896 cone shell
 Neogastropoda - Terebridae
Strioterebrum listrotum2 Woodring 1970 auger snail
n. sp.
 Stromboidea - Thersiteidae
Orthaulax cf. pugnax1 Heilprin 1887 snail
 Ficoidea - Ficidae
Gonysycon epomis1 Woodring 1959 fig shell
 Naticoidea - Naticidae
"Natica (Naticarius) cf. sp." = Naticarius, Sinum sp., Polinices sp.
"Natica (Naticarius) cf. sp." = Naticarius Dumeril 1806 moon snail
Sinum sp. Röding 1798 moon snail
Polinices sp. Monfort 1810 moon snail
 Sorbeoconcha - Campanilidae
"Cerithium (Thericium) mimeticum" = Thericium1
"Cerithium (Thericium) mimeticum" = Thericium1 snail
 Sorbeoconcha - Turritellidae
"Turritella cf. altilira" = Turritella (Bactrospira) altilira Conrad 1857 turret shell
Wooding (1959) repeats list, but does not include T. altilira, but rather T. listrota
Turritella aff. venezuelana Hodson 1926 turret shell
Wooding (1959) repeats list, but does not include T. venezuela, but rather T. listrota
 Heterostropha - Acteonidae
 Trochoidea - Trochidae
Solariella ephnidia Woodring 1959 top snail
 Dentaliida - Dentaliidae
Dentalium (? Laevidentalium) sp.3 Cossmann 1888 tusk shell
 Gadilida - Gadilidae
Cadulus sp.3 Philippi 1844 tusk shell
 Nautilida - Aturiidae
Aturia sp.4 Bronn 1838 nautiloid