PPP# 220 - Sabanita [lower Gatun Fm] (Miocene of Panama)

Also known as NMB Loc. 17638

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 Sr dating for nearby sections indicates an age of approximately 11.3 Ma (Hendy, unpublished data).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 8/19/87. 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 79783: authorized by Arnold Miller, entered by Kate Bulinski on 24.03.2008, 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.
 Decapoda - Callianassidae
Neocallichirus scotti3 Brown and Pilsbry 1913 decapod
 Decapoda - Calappidae
Calappa flammea3 Herbst 1794 box crab
 Arcida - Arcidae
Anadara (Rasia) sp. Gray 1857 ark
 Pectinida - Pectinoidae
Leptopecten sp. Verrill 1897 scallop
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
 Pholadida - Corbulidae
Caryocorbula sp. Gardner 1926 clam
 Cardiida - Veneridae
Chione sp. von Mühlfield 1811 venus clam
Macrocallista (Megapitaria) sp. Grant and Gale 1931 venus clam
Clementia sp. Gray 1847 venus clam
 Cardiida - Semelidae
Ervilia sp. Turton 1822 clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
Trigoniocardia sp. Dall 1900 cockle
sensu lato
 Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789 olive snail
Olivella (Niteoliva) sp. Olsson 1956 olive snail
 Neogastropoda - Columbellidae
Strombina (Strombina) sp. Mörch 1858 snail
Sincola sp. Olsson and Harbison 1953 snail
"Costoanachis sp." = Anachis (Costoanachis) Sacco 1890 snail
 Neogastropoda - Buccinidae
Cymatophos sp. Pilsbry and Olsson 1941 true whelk
? Antillophos sp. Woodring 1928 true whelk
? Metaphos sp. Olsson 1964 true whelk
 Neogastropoda - Nassariidae
Calophos sp. Woodring 1964 snail
Nassarius sp. Duméril 1806 snail
sensu lato
 Neogastropoda - Cancellariidae
Aphera aphrodite2 Landau et al. 2012 snail
Euclia codazzii2 Anderson 1929 snail
Euclia dinota2 Woodring 1970 snail
Bivetiella dariena2 Toula 1908 snail
Cancellaria sp. Lamarck 1799 snail
sensu lato
Cancellaria mixta2 Landau et al. 2012 snail
Narona barystoma2 Woodring 1970 snail
 Neogastropoda - Cystiscidae
Persicula sp. Schumacher 1817 snail
 Neogastropoda - Muricidae
Eupleura sp. Adams and Adams 1853 murex snail
Haustellum sp. Schumacher 1817 murex snail
 Neogastropoda - Mangeliidae
? Dolostoma sp. Woodring 1970 snail
 Neogastropoda - Drilliidae
Agladrillia (Agladrillia) sp. Woodring 1928 snail
 Neogastropoda - Turridae
Crassispira (Crassispira) sp. Swainson 1840 turrid
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891 auger snail
Terebra (Panaterebra) sp. Olsson 1967 auger snail
 Vanikoroidea - Eulimidae
Eulimidae indet. Philippi 1853 snail
Niso sp. Risso 1826 snail
 Naticoidea - Naticidae
Natica sp. Scopoli 1777 moon snail
"Natica (Naticarius) sp." = Naticarius Dumeril 1806 moon snail
? Tectonatica sp. Sacco 1890 moon snail
? Sinum sp. Röding 1798 moon snail
Polinices sp. Monfort 1810 moon snail
Neverita sp. Risso 1826 moon snail
 Calyptraeoidea - Calyptraeidae
Crucibulum (Crucibulum) sp. Schumacher 1817 slipper shell
Crepidula sp. Lamarck 1799 slipper shell
 Tonnoidea - Bursidae
Bursa rugosa1 Sowerby 1835 frog shell
 Truncatelloidea - Tornidae
Teinostoma sp. Adams and Adams 1853 snail
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
 Pyramidelloidea - Pyramidellidae
Pyramidellinae indet. Gray 1840 snail
Turbonillinae indet. Bronn 1849 snail
 Architectonicoidea - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Turbinoidea - Turbinidae
Solariorbis sp. Conrad 1865 snail
 Dentaliida - Dentaliidae
Tesseracme sp. Pilsbry 1898 tusk shell
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell