The first Oligocene sea turtle (Pan-Cheloniidae) record of South America

Edwin Cadena, Juan Abella, Maria Gregori

Resultado de la investigación: Contribución a RevistaArtículo

Resumen

The evolution and occurrence of fossil sea turtles at the Pacific margin of South America
is poorly known and restricted to Neogene (Miocene/Pliocene) findings from the
Pisco Formation, Peru. Here we report and describe the first record of Oligocene
(late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. The
fossil material corresponds to a single, isolated and well-preserved costal bone found at
the Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with other
Oligocene and extant representatives allow us to confirm that belongs to a sea turtle
characterized by: lack of lateral ossification, allowing the dorsal exposure of the distal
end of ribs; dorsal surface of bone sculptured, changing from dense vermiculation at
the vertebral scute region to anastomosing pattern of grooves at the most lateral portion
of the costal. This fossil finding shows the high potential that the Ecuadorian Oligocene
outcrops have in order to explore the evolution and paleobiogeography distribution of
sea turtles by the time that the Pacific and the Atlantic oceans were connected via the
Panama basin.
Idioma originalEnglish
PublicaciónPeerJ
Volumen6
DOI
EstadoPublished - mar 23 2018
Publicado de forma externa

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Cadena, Edwin ; Abella, Juan ; Gregori, Maria. / The first Oligocene sea turtle (Pan-Cheloniidae) record of South America. En: PeerJ. 2018 ; Vol. 6.
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abstract = "The evolution and occurrence of fossil sea turtles at the Pacific margin of South Americais poorly known and restricted to Neogene (Miocene/Pliocene) findings from thePisco Formation, Peru. Here we report and describe the first record of Oligocene(late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. Thefossil material corresponds to a single, isolated and well-preserved costal bone found atthe Monta{\~n}ita/Ol{\'o}n locality, Santa Elena Province, Ecuador. Comparisons with otherOligocene and extant representatives allow us to confirm that belongs to a sea turtlecharacterized by: lack of lateral ossification, allowing the dorsal exposure of the distalend of ribs; dorsal surface of bone sculptured, changing from dense vermiculation atthe vertebral scute region to anastomosing pattern of grooves at the most lateral portionof the costal. This fossil finding shows the high potential that the Ecuadorian Oligoceneoutcrops have in order to explore the evolution and paleobiogeography distribution ofsea turtles by the time that the Pacific and the Atlantic oceans were connected via thePanama basin.",
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The first Oligocene sea turtle (Pan-Cheloniidae) record of South America. / Cadena, Edwin; Abella, Juan; Gregori, Maria.

En: PeerJ, Vol. 6, 23.03.2018.

Resultado de la investigación: Contribución a RevistaArtículo

TY - JOUR

T1 - The first Oligocene sea turtle (Pan-Cheloniidae) record of South America

AU - Cadena, Edwin

AU - Abella, Juan

AU - Gregori, Maria

PY - 2018/3/23

Y1 - 2018/3/23

N2 - The evolution and occurrence of fossil sea turtles at the Pacific margin of South Americais poorly known and restricted to Neogene (Miocene/Pliocene) findings from thePisco Formation, Peru. Here we report and describe the first record of Oligocene(late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. Thefossil material corresponds to a single, isolated and well-preserved costal bone found atthe Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with otherOligocene and extant representatives allow us to confirm that belongs to a sea turtlecharacterized by: lack of lateral ossification, allowing the dorsal exposure of the distalend of ribs; dorsal surface of bone sculptured, changing from dense vermiculation atthe vertebral scute region to anastomosing pattern of grooves at the most lateral portionof the costal. This fossil finding shows the high potential that the Ecuadorian Oligoceneoutcrops have in order to explore the evolution and paleobiogeography distribution ofsea turtles by the time that the Pacific and the Atlantic oceans were connected via thePanama basin.

AB - The evolution and occurrence of fossil sea turtles at the Pacific margin of South Americais poorly known and restricted to Neogene (Miocene/Pliocene) findings from thePisco Formation, Peru. Here we report and describe the first record of Oligocene(late Oligocene, ∼24 Ma) Pan-Cheloniidae sea turtle remains of South America. Thefossil material corresponds to a single, isolated and well-preserved costal bone found atthe Montañita/Olón locality, Santa Elena Province, Ecuador. Comparisons with otherOligocene and extant representatives allow us to confirm that belongs to a sea turtlecharacterized by: lack of lateral ossification, allowing the dorsal exposure of the distalend of ribs; dorsal surface of bone sculptured, changing from dense vermiculation atthe vertebral scute region to anastomosing pattern of grooves at the most lateral portionof the costal. This fossil finding shows the high potential that the Ecuadorian Oligoceneoutcrops have in order to explore the evolution and paleobiogeography distribution ofsea turtles by the time that the Pacific and the Atlantic oceans were connected via thePanama basin.

U2 - 10.7717/peerj.4554

DO - 10.7717/peerj.4554

M3 - Artículo

VL - 6

JO - PeerJ

JF - PeerJ

SN - 2167-8359

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