PPP# 232 - Sabanita [lower Gatun Fm] (Miocene of Panama)

Also known as NMB Loc. 17650

Where: Colon, Panama (9.4° N, 79.8° W: paleocoordinates 9.1° N, 78.4° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: lower Gatun Member (Gatun Formation), Tortonian (11.6 - 7.2 Ma)

• STRATIGRAPHIC RELATIONS: The Gatun Fm rests unconformably on formations of different ages in different parts of the Panama Canal Basin. To the east of Colon, the Gatun Fm rests nonconformably on unamed Cretaceous volcanics. To the west of Colon, including several islands in Lake Gatun, the Gatun Fm rests with angular unconformity on the upper Oligocene Caimito Fm. Locality: Sabanita to Payardi

• bed-level stratigraphic resolution

Environment/lithology: coastal; unlithified, gray, green siltstone and unlithified, bioturbated sandstone

• ENVIRONMENT: from Collins et al. (1999), open, inner neritic.
• GENERAL LITHOLOGY: The lower 5m of the lower Gatun Formation consists of volcanic conglomerate, with 1-5cm clasts and a tuffaceous, arkoskic matrix, cross-bedded, laminated, tuffaceous siltstone and alternating laminated sandstone and siltstone, mostly deeply weathered. The overlying 40m (Section 1) consists of massive, grey-green, clayey siltstone, with minor claystone and fine sandstone units. zones of densely packed large concretions, pervasive bioturbation, and extensive thalassinoid burrow systems, as well as simple vertical and lateral hash-filled burrows. Shell hash of varying grain size and density is almost ubiquitous, as are units packed with diverse, whole mollusks.

Size class: macrofossils

Reposited in the NMB

Collection methods: bulk, sieve,

• COVERAGE: Exhaustive for gastropoda, bivalvia and scaphopoda. COLLECTORS: unknown (PPP staff) collected 8/25/87. REPOSITORIES: Naturhistorisches Museum Basel (NMB).

Primary reference: L. S. Collins and A. G. Coates. 1999. A paleobiotic survey of Caribbean faunas from the Neogene of the Isthmus of Panama. Bulletins of American Paleontology (357) [A. Miller/A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 79997: authorized by Austin Hendy, entered by Kate Bulinski on 31.03.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• NOMENCLATURE: modern nomenclature, though only identified to subgenus resolution. IDENTIFIER: presumably identified by J. Jackson, J. Todd, H. Fortunato, and P. Jung.
Bivalvia
 Pectinida - Pectinoidae
Leptopecten sp. Verrill 1897 scallop
 Ostreida - Pinnidae
Atrina sp. Gray 1842 oyster
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
 Lucinida - Lucinidae
Linga (Bellucina) sp. Dall 1901 clam
 Cardiida - Veneridae
Macrocallista (Megapitaria) sp. Grant and Gale 1931 venus clam
Chionopsis sp. Olsson 1932 venus clam
 Cardiida - Kelliellidae
Alveinus sp. Conrad 1865 clam
 Cardiida - Mactridae
Mulinia sp. Gray 1837 clam
 Cardiida - Semelidae
Ervilia sp. Turton 1822 clam
 Cardiida - Cardiidae
Trigoniocardia sp. Dall 1900 cockle
sensu lato
Trachycardium sp. Mörch 1853 cockle
sensu lato
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
 Dentaliida - Dentaliidae
Tesseracme sp. Pilsbry 1898 tusk shell
Gastropoda
 Neotaenioglossa - Calyptraeidae
Crucibulum (Crucibulum) sp. Schumacher 1817 slipper shell
 Cerithioidea - Cerithiidae
Alabina sp. Dall 1902 cerith snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Vanikoroidea - Eulimidae
Eulimidae indet. Philippi 1853 snail
Niso sp. Risso 1826 snail
 Sorbeoconcha - Caecidae
Caecidae indet. Gray 1850 snail
 Sorbeoconcha - Naticidae
Polinices sp., "Natica (Naticarius) sp." = Naticarius, ? Stigmaulax sp.
Polinices sp. Monfort 1810 moon snail
"Natica (Naticarius) sp." = Naticarius Dumeril 1806 moon snail
? Stigmaulax sp. Morch 1852 moon snail
 Neogastropoda - Cancellariidae
Cancellaria sp. Lamarck 1799 snail
sensu lato
 Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789 olive snail
Olivella (Niteoliva) sp. Olsson 1956 olive snail
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Drilliidae
Agladrillia (Agladrillia) sp. Woodring 1928 snail
 Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891 auger snail
 Neogastropoda - Cystiscidae
Persicula sp. Schumacher 1817 snail
 Neogastropoda - Columbellidae
Strombina (Strombina) sp. Mörch 1858 snail
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
sensu lato
 Trochoidea - Skeneidae
Solariorbis sp. Conrad 1865 snail
 Opisthobranchia - Retusidae
Volvulella (Volvulella) sp. Newton 1891 snail
 Opisthobranchia - Cylichnidae
Cylichnella sp. Gabb 1873 snail
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial