USGS 6020a, Canal Zone (Miocene of Panama)

Also known as Woodring Loc. 100

Where: Panama (9.8° N, 79.7° W: paleocoordinates 8.8° N, 77.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Culebra Formation, Aquitanian (23.0 - 20.4 Ma)

• LITHOSTRATIGRAPHY: From the Culebra Formation, which unconformably overlies the Las Cascadas agglomerate; reassigned to La Boca Fm in subsequent publications of Woodring (e.g., 1973, 1982), but further emended by Kirby et al. (2009) to the lower member of the Culebra Formation. AGE: Early Miocene in text; direct date extrapolated from Kirby et al. (1999), =Aquitanian.

• bed-level stratigraphic resolution

Environment/lithology: marine; poorly lithified, fine-grained shale and carbonaceous mudstone

• No paleoenvironmental data reported.
• Collection assumed to be from lower part of formation. The lower part of the formation comprises: dark-colored, thin-bedded or laminated, fine-grained rocks; carbonaceous or lignitic shale, carbonaceous silty mudstone, tuffaceous siltstone. The upper part comprises: calcareous and sandy strata, and ranges from tuffaceous amd pebbly calcareous sandstone to sandy limestone.

Size class: macrofossils

Collected by D.F. MacDonald, T.W. Vaughan in 1911; reposited in the USNM

Collection methods: quarrying,

• Collected by MacDonald and Vaughan (1911). 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. Locality now unaccessible (submerged).

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 42624: authorized by Austin Hendy, entered by Austin Hendy on 03.08.2004, edited by Matthew Clapham

Creative Commons license: CC BY (attribution)

Taxonomic list

• Exhaustive for gastropoda.
 Balanomorpha - Balanidae
"Balanus (Hesperibalanus) sp." = Hesperibalanus1
"Balanus (Hesperibalanus) sp." = Hesperibalanus1 Pilsbry 1916 barnacle
 Decapoda - Portunidae
Callinectes reticulatus n. sp.2 Rathbun 1918 swimming crab
 Decapoda - Goniochelidae
? Goniochele armata n. sp.2 Rathbun 1918 crab
 Decapoda - Calappidae
Calappella quadrispina n. gen. n. sp.2
Calappella quadrispina n. gen. n. sp.2 Rathbun 1918 box crab
 Decapoda - Hexapodidae
Thaumastoplax prima n. sp.2 Rathbun 1918 crab
 Decapoda - Callianassidae
"Callianassa crassimana n. sp." = Neocallichirus scotti2, Callianassa magna n. sp.2, Callianassa ovalis n. sp.2, Callianassa abbreviata n. sp.2, Callianassa spinulosa n. sp.2, Callianassa elongata n. sp.2, Callianassa quadrata n. sp.2
"Callianassa crassimana n. sp." = Neocallichirus scotti2 Brown and Pilsbry 1913 decapod
Callianassa magna n. sp.2 Rathbun 1918 decapod
Callianassa ovalis n. sp.2 Rathbun 1918 decapod
Callianassa abbreviata n. sp.2 Rathbun 1918 decapod
Callianassa spinulosa n. sp.2 Rathbun 1918 decapod
Callianassa elongata n. sp.2 Rathbun 1918 decapod
Callianassa quadrata n. sp.2 Rathbun 1918 decapod
 Decapoda - Axiidae
Axius reticulatus n. sp.2 Rathbun 1918 decapod
 Heterostropha - Architectonicidae
 Neotaenioglossa - Calyptraeidae
Crepidula sp. Lamarck 1799 slipper shell
Calyptraea cf. centralis Conrad 1841 slipper shell
 Neogastropoda - Nassariidae
Nassarius (? Uzita) praeambiguus3 Brown and Pilsbry 1913 snail
 Neogastropoda - Olividae
Oliva (Oliva) sp.4 Bruguière 1789 olive snail
? Olivella sp.3 Swainson 1831 olive snail
 Sorbeoconcha - Naticidae
? Polinices sp. Monfort 1810 moon snail
 Sorbeoconcha - Cerithiidae
Bittium scotti4 Brown and Pilsbry 1913 cerith snail
 Protobranchia - Nuculanidae
Saccella sp.5 Woodring 1925 pointed nut clam
elongate form
 Mytilida - Mytilidae
Mytilus canoasensis5 Olsson 1931 mussel
Subspecies: Mytilus canoasensis vidali
 Pholadida - Corbulidae
Caryocorbula sp.6 Gardner 1926 clam
 Cardiida - Psammobiidae
Gari (Gobraeus) sp.6 Brown 1844 clam
 Cardiida - Tellinidae
Strigilla sp.6 Turton 1822 tellin clam
Psammacoma diphas6 Woodring 1982 tellin clam
Tellina (Eurytellina) vetula6 Brown and Pilsbry 1913 tellin clam
 Cardiida - Donacidae
 Cardiida - Veneridae
Lamelliconcha cf. aequicincta6 Spieker 1922 venus clam
Chione (Chionopsis) propinqua6 Spieker 1922 venus clam