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Fosil penyu Tertua yang ditemukan : berusia setidaknya 120 juta tahun
Date:
September 7, 2015
Source:
Senckenberg Research Institute and Natural History Museum
Summary:
Fosil Penyu tertua di dunia yang dikenal sampai saat ini telah ditemukan oleh para ilmuwan . fosil Reptil berusia setidaknya 120 juta tahun - yang membuat sekitar 25 juta tahun lebih tua dari spesimen tertua yang diketahui sebelumnya . Kerangka hampir sepenuhnya diawetkan dari Cretaceous , dengan panjang hampir 2 meter , menunjukkan semua karakteristik dari penyu laut modern.
........ " Penyu dijelaskan sebagai Desmatochelys padillai sp.originates dari sedimen Kapur dan setidaknya dari 120 juta tahun , " kata Cadena . Kura-kura laut turun dari kura-kura darat dan air tawar yang muncul sekitar 230 juta tahun yang lalu ...more
Oldest fossil
sea turtle discovered: Huge fossilized turtle is at least 120 million years old
Date:
September 7, 2015
Source:
Senckenberg Research Institute and Natural History Museum
Summary:
The world's oldest fossil sea turtle known to date has been found by
scientists. The fossilized reptile is at least 120 million years old -- which
makes it about 25 million years older than the previously known oldest
specimen. The almost completely preserved skeleton from the Cretaceous, with a
length of nearly 2 meters, shows all of the characteristic traits of modern
marine turtles.
...................
Scientists at the Senckenberg Research Institute in Frankfurt have
described the world's oldest fossil sea turtle known to date. The fossilized
reptile is at least 120 million years old -- which makes it about 25 million
years older than the previously known oldest specimen. The almost completely
preserved skeleton from the Cretaceous, with a length of nearly 2 meters, shows
all of the characteristic traits of modern marine turtles. The study was
published in the scientific journalPaleoBios.
"Santanachelys gaffneyi is the oldest known sea
turtle" -- this sentence from the online encyclopedia Wikipedia is no
longer up-to-date. "We described a fossil sea turtle from Colombia that is
about 25 million years older," said Dr. Edwin Cadena, a scholar of the
Alexander von Humboldt foundation at the Senckenberg Research Institute. Cadena
made the unusual discovery together with his colleague from the US, J. Parham
of California State University, Fullerton.
"The turtle described by us as Desmatochelys padillai sp.originates
from Cretaceous sediments and is at least 120 million years old," says
Cadena. Sea turtles descended from terrestrial and freshwater turtles that
arose approximately 230 million years ago. During the Cretaceous period, they
split into land and sea dwellers. Fossil evidence from this time period is very
sparse, however, and the exact time of the split is difficult to verify.
"This lends a special importance to every fossil discovery that can
contribute to clarifying the phylogeny of the sea turtles," explains the
turtle expert from Columbia.
The fossilized turtle shells and bones come from two sites near the
community of Villa de Leyva in Colombia. The fossilized remains of the ancient
reptiles were discovered and collected by hobby paleontologist Mary Luz Parra
and her brothers Juan and Freddy Parra in the year 2007. Since then, they have
been stored in the collections of the "Centro de Investigaciones Paleontológicas"
in Villa Leyva and the "University of California Museum of
Paleontology."
Cadena and his colleague examined the almost complete skeleton, four
additional skulls and two partially preserved shells, and they placed the
fossils in the turtle group Chelonioidea, based on various morphological
characteristics. Turtles in this group dwell in tropical and subtropical
oceans; among their representatives are the modern Hawksbill Turtle and the
Green Sea Turtle of turtle soup fame.
"Based on the animals' morphology and the sediments they were found
in, we are certain that we are indeed dealing with the oldest known fossil sea
turtle," adds Cadena in summary.
Story Source:
The above post is reprinted from materials provided bySenckenberg Research Institute and Natural History Museum. Note:
Materials may be edited for content and length.
Journal Reference:
1.
Cadena, E.A. and J.F. Parham. Oldest known marine turtle? A new
protostegid from the Lower Cretaceous of Colombia. PaleoBios,
September 2015