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Spesies baru
pterosaur terbang : tulang
hampir 50 dari reptil terbang purba yang
ditemukan
Para ilmuwan
menemukan tulang-tulang hampir 50 dari reptil bersayap dari spesies baru, Caiuajara dobruskii, yang hidup
masa Cretaceous di Brasil Selatan................
New species of flying pterosaur: Bones from nearly 50 ancient flying
reptiles discovered
Date:
August 13,
2014
Source:
PLOS
Summary:
Scientists discovered the bones of
nearly 50 winged reptiles from a new species, Caiuajara dobruskii, that lived
during the Cretaceous in southern Brazil.
.........................
Scientists discovered the bones of nearly 50 winged reptiles
from a new species, Caiuajara dobruskii,
that lived during the Cretaceous in southern Brazil, according to a study
published August 13, 2014 in the open-access journal PLOS ONE by Paulo Manzig from
Universidade do Contestado, Brazil, and colleagues.
The authors
discovered the bones in a pterosaur bone bed in rocks from the Cretaceous
period. They belonged to individuals ranging from young to adult, with wing
spans ranging from 0.65-2.35m, allowing scientists to analyze how the bones fit
into their clade, but also how the species developed as it matured. After the
initial analysis, scientists determined that the bones represent a new
pterosaur, Caiuajara dobruskii, which is the southernmost known
occurrence of this particular clade.
Several
features of the Caiuajara dobruskii head differ from all other members
of this clade, including the presence of a bony expansion projecting inside the
large opening in the skull in front of the eyes, and the rounded depressions in
the outer surface of the jaw. Younger and older reptiles mainly varied in the
size and angle of the bony crest on the top of the head. The crest appeared to
change from small and inclined in juveniles, to large and steep in adults.
According to
the authors, the bone analysis suggests this species was gregarious, lived in
colonies and may have been able to fly at a very young age.
Story
Source:
The above
story is based on materials provided by PLOS. Note: Materials may be edited
for content and length.
Journal
Reference:
- Manzig PC, Kellner AWA, Weinschutz LC, Fragoso CE, Vega CS, et al. Discovery of a Rare Pterosaur Bone Bed in a Cretaceous Desert with Insights on Ontogeny and Behavior of Flying Reptiles. PLOS ONE, 2014 DOI: 10.1371/journal.pone.0100005
