PPP# 219 - Sabanita [lower Gatun Fm] (Miocene of Panama)

Also known as NMB Loc. 17637

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. AGE: Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 11.3 Ma (Hendy, unpublished data).

• 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 8/18/87. 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 79780: authorized by Arnold Miller, entered by Kate Bulinski on 23.03.2008, edited by Austin Hendy

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.
unclassified
  -
Gastropoda
 Trochoidea - Skeneidae
Solariorbis sp. Conrad 1865 snail
 Epitonioidea - Epitoniidae
Epitonium (Asperiscala) sp. de Boury 1909 wentletrap
 Vanikoroidea - Eulimidae
Eulimidae indet. Philippi 1853 snail
Niso sp. Risso 1826 snail
 Neotaenioglossa - Calyptraeidae
Crepidula sp. Lamarck 1799 slipper shell
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Neogastropoda - Olividae
Olivella (Niteoliva) sp. Olsson 1956 olive snail
Oliva (Oliva) sp. Bruguière 1789 olive snail
 Neogastropoda - Buccinidae
Cymatophos sp. Pilsbry and Olsson 1941 true whelk
? Antillophos sp. Woodring 1928 true whelk
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
sensu lato
Calophos sp. Woodring 1964 snail
 Neogastropoda - Columbellidae
Strombina (Strombina) sp. Mörch 1858 snail
 Neogastropoda - Melongenidae
Melongena sp. Schumacher 1817 snail
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Drilliidae
Hindsiclava sp. Hertlein and Strong 1955 snail
Agladrillia (Agladrillia) sp. Woodring 1928 snail
 Neogastropoda - Terebridae
Terebra (Panaterebra) sp. Olsson 1967 auger snail
Strioterebrum sp. Sacco 1891 auger snail
 Neogastropoda - Turridae
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Muricidae
Eupleura sp. Adams and Adams 1853 murex snail
 Neogastropoda - Cancellariidae
Pyruclia tweedledee3 Landau et al. 2012 snail
Euclia dinota2 Woodring 1970 snail
Bivetiella dariena3 Toula 1908 snail
Cancellaria sp. Lamarck 1799 snail
sensu lato
 Sorbeoconcha - Tonnidae
Malea ringens1 Swainson 1822 tun shell
 Sorbeoconcha - Bursidae
Bursa rugosa1 Sowerby 1835 frog shell
 Sorbeoconcha - Cypraeidae
Siphocypraea sp. Heilprin 1897 cowry
 Sorbeoconcha - Naticidae
Polinices sp., Neverita (Glossaulax) sp., "Natica (Naticarius) sp." = Naticarius
Polinices sp. Monfort 1810 moon snail
Neverita (Glossaulax) sp. Pilsbry 1929 moon snail
"Natica (Naticarius) sp." = Naticarius Dumeril 1806 moon snail
 Sorbeoconcha - Caecidae
Caecidae indet. Gray 1850 snail
 Heterostropha - Pyramidellidae
Turbonillinae indet. Bronn 1849 snail
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Opisthobranchia - Cylichnidae
Cylichnella sp. Gabb 1873 snail
Acteocina sp. Gray 1847 barrel-bubble
Bivalvia
 Arcida - Arcidae
Anadara (Rasia) sp. Gray 1857 ark
 Pectinida - Pectinoidae
Leptopecten sp. Verrill 1897 scallop
 Pholadida - Corbulidae
"Bothrocorbula (Hexacorbula) sp." = Hexacorbula, Caryocorbula sp.
"Bothrocorbula (Hexacorbula) sp." = Hexacorbula Olsson 1932 clam
Caryocorbula sp. Gardner 1926 clam
 Cardiida - Chamidae
Arcinella sp. Schumacher 1817 jewel box
 Cardiida - Veneridae
Macrocallista (Megapitaria) sp. Grant and Gale 1931 venus clam
Chionopsis sp. Olsson 1932 venus clam
 Cardiida - Mactridae
Spisula sp. Gray 1837 clam
 Cardiida - Cardiidae
Trigoniocardia sp. Dall 1900 cockle
sensu lato
Cardium sp. Linnaeus 1758 cockle
 Cardiida - Semelidae
Semele sp. Schumacher 1817 clam
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell