PPP# 222 - Sabanita [lower Gatun Fm] (Miocene of Panama)

Also known as NMB Loc. 17640

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 Sr dating for nearby sections indicates an age of approximately 11.3 Ma (Hendy, unpublished data).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 79785: 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.
Gymnolaemata
 Cheilostomata - Schizoporellidae
 Cheilostomata - Smittinidae
 Cheilostomata - Steginoporellidae
Gastropoda
 Opisthobranchia - Retusidae
Volvulella (Volvulella) sp. Newton 1891 snail
 Opisthobranchia - Cylichnidae
Cylichnella sp. Gabb 1873 snail
Acteocina sp. Gray 1847 barrel-bubble
 Trochoidea - Skeneidae
Solariorbis sp. Conrad 1865 snail
 Heterostropha - Architectonicidae
Architectonica sp. Röding 1798 sundial
 Heterostropha - Pyramidellidae
Eulimella (Eulimella) sp. Forbes and MacAndrew 1846 snail
Pyramidellinae sp. Gray 1840 snail
Turbonillinae indet. Bronn 1849 snail
 Heterostropha - Acteonidae
Acteon sp. Montfort 1810 snail
 Vanikoroidea - Eulimidae
Eulimidae sp. Philippi 1853 snail
Niso sp. Risso 1826 snail
 Epitonioidea - Epitoniidae
Epitonium sp. Bolten 1798 wentletrap
 Pseudomelanoidea - Pseudomelaniidae
Miraclathurella sp. Woodring 1928 snail
Crassispira (Crassispira) sp. Swainson 1840 snail
 Cerithioidea - Cerithiidae
Alabina sp. Dall 1902 cerith snail
? Bittiolum sp. Cossmann 1906 cerith snail
Bittium sp. Gray 1847 cerith snail
 Cerithioidea - Turritellidae
Turritella sp. Lamarck 1799 turret shell
 Neotaenioglossa - Calyptraeidae
Calyptraea sp. Lamarck 1799 slipper shell
Crucibulum (Crucibulum) sp. Schumacher 1817 slipper shell
 Neogastropoda - Cystiscidae
Persicula sp. Schumacher 1817 snail
 Neogastropoda - Nassariidae
Nassarius sp. Duméril 1806 snail
sensu lato
 Neogastropoda - Columbellidae
Sincola (Sincola) sp. Olsson and Harbison 1953 snail
"Costoanachis sp." = Anachis (Costoanachis) Sacco 1890 snail
 Neogastropoda - Buccinidae
Cymatophos sp. Pilsbry and Olsson 1941 true whelk
 Neogastropoda - Olividae
Oliva (Oliva) sp. Bruguière 1789 olive snail
Olivella (Niteoliva) sp. Olsson 1956 olive snail
 Neogastropoda - Cancellariidae
Cancellaria sp. Lamarck 1799 snail
sensu lato
 Neogastropoda - Drilliidae
Agladrillia (Agladrillia) sp. Woodring 1928 snail
 Neogastropoda - Terebridae
Strioterebrum sp. Sacco 1891 auger snail
 Neogastropoda - Turridae
Polystira sp. Woodring 1928 turrid
 Neogastropoda - Conidae
Conus sp. Linnaeus 1758 cone shell
 Neogastropoda - Mangeliidae
Ithycythara sp. Woodring 1928 snail
 Sorbeoconcha - Naticidae
"Natica (Naticarius) sp." = Naticarius, Polinices sp.
"Natica (Naticarius) sp." = Naticarius Dumeril 1806 moon snail
Polinices sp. Monfort 1810 moon snail
 Sorbeoconcha - Tornidae
Teinostoma sp. Adams and Adams 1853 snail
 Sorbeoconcha - Caecidae
Caecidae sp. Gray 1850 snail
Bivalvia
 Lucinida - Lucinidae
? Parvilucina sp. Dall 1901 clam
Linga (Bellucina) sp. Dall 1901 clam
 Cardiida - Chamidae
Arcinella sp. Schumacher 1817 jewel box
 Cardiida - Mactridae
Mulinia sp. Gray 1837 clam
 Cardiida - Anatinellidae
Raeta sp. Gray 1853 clam
 Cardiida - Veneridae
Chionopsis sp. Olsson 1932 venus clam
Macrocallista (Megapitaria) sp. Grant and Gale 1931 venus clam
 Cardiida - Semelidae
Ervilia sp. Turton 1822 clam
 Cardiida - Cardiidae
Cardium sp. Linnaeus 1758 cockle
Trigoniocardia sp. Dall 1900 cockle
sensu lato
 Pholadida - Corbulidae
Caryocorbula sp. Gardner 1926 clam
 Carditida - Crassatellidae
Crassinella sp. Guppy 1874 clam
 Arcida - Arcidae
Anadara (Rasia) sp. Gray 1857 ark
 Pectinida - Propeamussiidae
Cyclopecten sp. Verrill 1897 mud scallop
 Pectinida - Pectinoidae
Leptopecten sp. Verrill 1897 scallop
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
 Dentaliida - Dentaliidae
Tesseracme sp. Pilsbry 1898 tusk shell