Bayano 9 (Miocene of Panama)

Where: Panama, Panama (9.1° N, 78.8° W: paleocoordinates 8.9° N, 77.5° W)

When: Chucunaque Formation, Late/Upper Miocene (11.6 - 5.3 Ma)

• From the text "In much of the Darien Province, the Chucunaque Formation of Shelton (1952) is Messinian in age (7.1–5.6 Ma), although Coates et al. (2004) suggested that it could be older than 9.4 Ma in the western part of their study area on the basis of calcareous nannofossil biostratigraphy. This age is consistent with 87Sr/86Sr dates of 10–9.5 Ma derived from calcerous Lindapectin shells that were deposited in association with the chondrichthyan remains"

Environment/lithology: deep subtidal shelf; lithified, silty, sandy lithology not reported

Size class: microfossils

Primary reference: V. J. Perez, C. Pimiento, A. Hendy, G. González-Barba, G. Hubbell and B. J. MacFadden. 2017. Late Miocene chondrichthyans from Lago Bayano, Panama: Functional diversity, environment and biogeography. Journal of Paleontology 91(3):512-547 [C. Jaramillo/C. Pimiento]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191995: authorized by Catalina Pimiento, entered by Jaime Villafana on 27.02.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Odontaspidida - Alopiidae
Alopias superciliosus Lowe 1840 thresher shark
 Myliobatiformes - Myliobatidae
Aetobatus sp. Blainville 1816 eagle ray
Rhinoptera sp. Cuvier 1829 cownose ray
 Lamniformes - Otodontidae
"Carcharocles megalodon" = Otodus megalodon
"Carcharocles megalodon" = Otodus megalodon Agassiz 1843 megalodon
 Lamniformes - Lamnidae
Isurus oxyrinchus Rafinesque 1810 mako shark
 Carchariniformes - Carcharhinidae
"Physogaleus contortus" = Galeocerdo contortus Gibbes 1848 tiger shark
"Galeocerdo cuvier" = Galeocerdo cuvieri Peron and LeSueur 1822 tiger shark
Carcharhinus spp. de Blainville 1816 requiem shark
Carcharhinus falciformis Bibron 1841 requiem shark
Carcharhinus obscurus Le Sueur 1818 requiem shark
Carcharhinus (aff. Carcharhinus) macloti Muller and Henle 1839 requiem shark
Carcharhinus plumbeus Nardo 1827 requiem shark
 Carchariniformes - Sphyrnidae
Sphyrna mokarran hammerhead shark
Sphyrna zygaena Linnaeus 1758 hammerhead shark
 Carchariniformes - Hemigaleidae
"Hemipristis serra" = Hemipristis heteropleurus
"Hemipristis serra" = Hemipristis heteropleurus Agassiz 1844 ground shark