Sabanita [lower Gatun Fm] (Miocene of Panama)

Where: Panama (9.3° 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)

• thought to be "basal" in section. AGE: Late/Upper Hemingfordian-Early/Lower Barstovian in Gillete (1984). Emended to Tortonian based on more recent dating (Hendy, 2012). Sr dating for nearby sections indicates an age of approximately 11.5 Ma (Hendy, unpublished data)

Environment/lithology: marine; argillaceous claystone

• formation is primarily "sandstone and siltstone" but fossiliferous horizon is a clay

•environment not discussed but clearly marine

• "marly clay"

Size classes: macrofossils, mesofossils

Collection methods: bulk, salvage, surface (float), chemical, sieve,

• "site had been exposed by heavy-equipment excavations for a housing development and had lain bare to erosion for several years. Fossil teeth and bones were exposed there along with abundant molluscan remains... Approximately one English ton... of sediment was collected and screen-washed by traditional wet-sieving methods... 25-mesh screen... heavy-liquid sorting" was used

Primary reference: D. D. Gillette. 1984. A marine ichthyofauna from the Miocene of Panama, and the Tertiary Caribbean faunal province. Journal of Vertebrate Paleontology 4(2):172-186 [J. Alroy/J. Alroy/J. Alroy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 24237: authorized by John Alroy, entered by John Alroy on 02.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Cathorops sp.
 Squaliformes - Dalatiidae
cf. Isistius sp. Gill 1864 elasmobranch
 Myliobatiformes - Dasyatidae
Dasyatis sp. Rafinesque 1810 whiptail stingray
 Myliobatiformes - Myliobatidae
Myliobatis sp. Cuvier 1816 eagle ray
Aetobatus arcuatus Agassiz 1843 eagle ray
Rhinoptera sp. Cuvier 1829 cownose ray
 Lamniformes - Otodontidae
"Procarcharodon megalodon" = Otodus megalodon
"Procarcharodon megalodon" = Otodus megalodon Agassiz 1843 megalodon
"P. megalodon megalodon"
 Lamniformes - Lamnidae
Carcharodon carcharias Linnaeus 1758 great white shark
 Carchariniformes - Carcharhinidae
Galeocerdo cf. contortus Gibbes 1848 tiger shark
Galeocerdo cf. aduncus Agassiz 1843 tiger shark
cf. Carcharhinus sp. de Blainville 1816 requiem shark
 Carchariniformes - Sphyrnidae
Sphyrna arambourgi hammerhead shark
Sphyrna zygaena Linnaeus 1758 hammerhead shark
 Carchariniformes - Hemigaleidae
"Hemipristis serra" = Hemipristis heteropleurus
"Hemipristis serra" = Hemipristis heteropleurus Agassiz 1844 ground shark
 Orectolobiformes - Ginglymostomatidae
Ginglymostoma delfortriei Daimeries 1889 nurse shark
 Acipenseriformes - Acipenseridae
Acipenser sp. Linnaeus 1758 sturgeon
 Istiophoriformes - Istiophoridae
Makaira cf. nigricans Lacépède 1802
"true localition" uncertain but "presumably" the same as that of Gillette 1984
 Acanthomorphata - Sphyraenidae
Sphyraena barracuda Edwards 1771 barracuda
 Pleuronectiformes - Bothidae
Bothidae indet. flatfish
otoliths; three forms
 Pleuronectiformes - Soleidae
? Soleidae indet. flatfish
 Scombriformes - Trichiuridae
 Ophidiiformes - Ophidiidae
Ophidiidae indet. Rafinesque 1810
 Perciformes -
Bairdiella sp. Gill 1861 perch-like fish
 Perciformes - Pomadasyidae
Pomadasys sp. Lacépède 1802 perch-like fish
otoliths; two forms
 Perciformes - Gobioidei
Gobiidae indet. Bonaparte 1832 goby
otoliths; three forms
 Acanthomorphata - Haemulidae
Haemulon sp. Cuvier 1829
otoliths; two forms
 Acanthomorphata - Percichthyidae
Percichthyidae indet. Jordan and Eigenman 1890
otoliths; "Synagrops-like"
 Acanthomorphata - Sciaenidae
Sciaenidae indet. Cuvier 1828
otoliths; "extinct" form
Cynoscion sp. Gill 1861
? Equetus sp. Rafinesque 1815
otoliths; two forms
Umbrina sp. Cuvier 1817
Larimus sp. Cuvier and Valenciennes 1830
 Spariformes - Sparidae
Sparidae indet. Cuvier 1817
 Myctophiformes - Myctophidae
Myctophidae indet. Gill 1893 lanternfish
otoliths; two forms
 Siluriformes - Ariidae
Bagre sp. Mitchill 1815 Ariid catfish
 Lepisosteiformes - Lepisosteidae
Lepisosteus sp. Agassiz 1843 gar
 Testudines -
"Chelonia indet." = Testudines
"Chelonia indet." = Testudines Batsch 1788 turtle
one carapace piece
 Loricata -
"Crocodilia indet." = Crocodylia
"Crocodilia indet." = Crocodylia Owen 1842 crocodilian
SMU 76452 (8 teeth) (see Hastings et al. 2013)
Mammalia indet. Linnaeus 1758 mammal
rib fragments