Location 38, Rio Cassaya area (Gatuncillo Formation) - Woodring (1957) (Eocene of Panama)

Also known as USGS 17166

Where: Panama (9.2° N, 79.7° W: paleocoordinates 6.7° N, 77.4° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Gatuncillo Formation, Late/Upper Eocene (37.2 - 33.9 Ma)

• Partly silicified sandy limestone. The maximum thickness of the formation here reaches 800 m. Fine-grained rocks (mudstone and siltstone) make up the bulk of the formation. Limestone, bentonic mudstone, sandstone, and conglomerate are minor constituents. The limestones are algal and foraminiferal na dmost have a thickness less than 1 meter,

• bed-level stratigraphic resolution

Environment/lithology: lithified, sandy, cherty/siliceous limestone

• Carbonate facies. No further paleoenvironmental information provided.
• Partly silicified sandy limestone.

Size class: macrofossils

Preservation: replaced with silica

Reposited in the USNM

Collection methods: quarrying,

• Collected by Stewart (1948), also collections by Thomson (1948) and Woodring (1949). 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 42495: authorized by Austin Hendy, entered by Austin Hendy on 30.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropods.
 Ostreida - Ostreidae
? Crassostrea sp.4 Sacco 1897 oyster
 Carditida - Carditidae
 Cardiida - Cardiidae
Chrysocardium aurum4 Woodring 1982 cockle
 Architaenioglossa - Ampullinidae
 Neogastropoda - Olividae
Olividae indet.2 Latreille 1825 olive snail
 Neogastropoda - Columbellidae
Columbellidae indet.2 Swainson 1840 snail
 Neogastropoda - Cystiscidae
 Neogastropoda - Volutidae
Ctenilyria ctenista2 Woodring 1964 volute
n. sp.
 Neogastropoda - Turbinellidae
Xancus cf. peruvianus2 Olsson 1928 snail
 Neogastropoda - Muricidae
Yasila aff. paytensis1 Olsson 1930 murex snail
 Neogastropoda - Harpidae
Morum ("Oniscidia") sp.1 Mörch 1852 snail
 Neogastropoda - Conidae
Conus cf. sauridens2 Conrad 1833 cone shell
 Stromboidea - Thersiteidae
Oostrombus aff. chiraensis1 Olsson 1931 snail
 Stromboidea - Seraphsidae
"Terebellum (Seraphs) belemnitum" = Seraphs1
"Terebellum (Seraphs) belemnitum" = Seraphs1 snail
 Vanikoroidea - Hipponicidae
Hipponix sp. Defrance 1819 hoof shell
 Naticoidea - Naticidae
Sinum sp. Röding 1798 moon snail
 Sorbeoconcha - Potamididae
Hannatoma antyx3 horn snail
? Hannatoma cf. emendorferi Olsson 1931 horn snail
 Sorbeoconcha - Turritellidae
"Turritella cf. carinata" = Haustator carinata
"Turritella cf. carinata" = Haustator carinata Lea 1833 turret shell
 Sorbeoconcha - Cerithiidae
Cerithium "sp. A"1 Bruguière 1789 cerith snail
Cerithium "sp. B"1 Bruguière 1789 cerith snail
Dirocerithium ame1 cerith snail
 Neritoidea - Neritidae
Velates perversus Gmelin 1791 snail