Kadal laut raksasa di zaman dinosaurus : Sebuah awal baru bagi bayi mosasaurs --T-REC-komunitas reptil-semarang--KSE-komunitas satwa eksotik

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Kadal laut raksasa di zaman dinosaurus : Sebuah awal baru bagi bayi mosasaurs 

.... namun para peneliti telah menemukan cerita kelahiran baru untuk kadal laut raksasa yang pernah menjelajahi lautan . Berkat spesimen yang baru-baru ini diidentifikasi , ahli paleontologi sekarang percaya bahwa mosasaurus perkasa - yang bisa tumbuh hingga 50 kaki panjang - melahirkan anak mereka di laut terbuka , tidak di dekat pantai ...read more

Giant sea
lizards in the age of dinosaurs: A new beginning for baby mosasaurs

Date:

April 10, 2015

Source:

Yale University

Summary:

They weren't in the
delivery room, but researchers have discovered a new birth story for a gigantic
marine lizard that once roamed the oceans. Thanks to recently identified
specimens, paleontologists now believe that mighty mosasaurs -- which could
grow to 50 feet long -- gave birth to their young in the open ocean, not on or
near shore.

.........................

they weren't in the
delivery room, but researchers at Yale University and the University of Toronto
have discovered a new birth story for a gigantic marine lizard that once roamed
the oceans.

Thanks to recently identified specimens at the Yale Peabody Museum of
Natural History, paleontologists now believe that mighty mosasaurs -- which
could grow to 50 feet long -- gave birth to their young in the open ocean, not
on or near shore.

The findings answer long-held questions about the initial environment of an
iconic predator that lived during the time of the dinosaurs. Mosasaurs
populated most waters of the Earth before their extinction 65 million years
ago.

"Mosasaurs are among the best-studied groups of Mesozoic vertebrate
animals, but evidence regarding how they were born and what baby mosasaur
ecology was like has historically been elusive," said Daniel Field, lead
author of a study published online April 10 in the journal Palaeontology.
Field is a doctoral candidate in the lab of Jacques Gauthier in Yale's Department
of Geology and Geophysics.

In their study, Field and his colleagues describe the youngest mosasaur
specimens ever found. Field had come across the fossils in the Yale Peabody
Museum's extensive collections. "These specimens were collected over 100
years ago," Field said. "They had previously been thought to belong
to ancient marine birds."

Field and Aaron LeBlanc, a doctoral candidate at the University of Toronto
at Mississauga, concluded that the specimens showed a variety of jaw and teeth
features that are only found in mosasaurs. Also, the fossils were found in
deposits in the open ocean.

"Really, the only bird-like feature of the specimens is their small
size," LeBlanc said. "Contrary to classic theories, these findings
suggest that mosasaurs did not lay eggs on beaches and that newborn mosasaurs
likely did not live in sheltered nearshore nurseries."







Story Source:

The above story is based on materials provided by Yale
University. The original article was written by Jim Shelton. Note: Materials
may be edited for content and length.







Journal Reference:

1.    Field, D. J., LeBlanc, A., Gau, A.,
Behlke, A. D. Pelagic neonatal fossils support viviparity and precocial
life history of Cretaceous mosasaurs.Palaeontology, 2015 DOI: 10.1111/pala.12165

http://www.sciencedaily.com/releases/2015/04/150410165316.htm

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