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Penemuan dinosaurus besar dalam paket kecil - toothy
Date:
August 7, 2015
Source:
University of Alberta
Summary:
Para peneliti telah meneliti salah satu bagian terkecil dari catatan fosil - gigi theropoda - untuk menjelaskan evolusi dinosaurus pada akhir periode Kapur . Temuan telah efektif empat kali lipat keragaman dinosaurus di wilayah studi , termasuk situs yang luar biasa : Lano . dimana sebelumnya hanya dua spesies yang diketahui di daerah tersebut .
.................. Studi dari 142 gigi terisolasi dari Campanian - Maastrichtian dari Pyrenean Basin Selatan menunjukkan enam spesies tambahan theropoda bergigi ( lima kecil , satu besar ) yang hadir di wilayah tersebut . " Mempelajari bagian-bagian kecil membantu kita merekonstruksi dunia kuno di mana dinosaurus hidup dan memahami bagaimana kepunahan mereka terjadi , " kata penulis Angelica Torices , post-doktoral fellow dalam ilmu biologi di University of Alberta . " Gigi sangat penting dalam studi makhluk kapur Atas / upper cretaceous di Spanyol dan seluruh Eropa karena kita tidak memiliki kerangka lengkap theropoda di lokasi tersebut . Kita harus bergantung pada unsur-unsur kecil untuk merekonstruksi evolusi dinosaurus ini , khususnya theropoda . ".....more
Big dinosaur
discoveries in tiny toothy packages
Teeth used to identify 6 non-avian dinosaurs of the Upper Cretaceous in the
South Pyrenees Basin in Spain
Date:
August 7, 2015
Source:
University of Alberta
Summary:
Researchers have examined one of the smallest parts of the fossil record --
theropod teeth -- to shed light on the evolution of dinosaurs at the end of the
Cretaceous. Findings have effectively quadrupled the dinosaur diversity in the
area of study, including the exceptional site of Laño. There were previously
only two known species in the area.
................
Researchers have examined one of the smallest parts of the fossil
record--theropod teeth--to shed light on the evolution of dinosaurs at the end
of the Cretaceous. Findings published in the journal Acta Palaeontologica Polonicahave effectively quadrupled the dinosaur
diversity in the area of study, eight localities from Treviño County, Huesca
and Lerida--including the exceptional site of Laño. There were previously only
two known species in the area.
The study of 142 isolated teeth from the Campanian-Maastrichtian of the
South Pyrenean Basin suggests six additional species of toothed theropods (five
small, one large) were present in the region. "Studying these small parts
helps us reconstruct the ancient world where dinosaurs lived and to understand
how their extinction happened," says lead author Angelica Torices,
post-doctoral fellow in biological sciences at the University of Alberta.
"Teeth are especially important in the study of Upper Cretaceous creatures
in Spain and the rest of Europe because we don't have complete skeletons of
theropods from that time in those locations. We have to rely on these small
elements to reconstruct the evolution of these dinosaurs, particularly the
theropods."
Carnivorous dinosaurs replaced their teeth continuously, with just one
dinosaur producing a huge number of these dental pieces and an endless number
of clues for understanding these mysterious creatures. This study demonstrates
the value of isolated teeth in reconstructing the composition of dinosaur
paleofaunas when other, more complete material is not present, allowing
interpretation of the evolution of diversity through time.
The findings provide huge strides in understanding not only the diversity
of carnivorous dinosaurs at the end of the Cretaceous in Europe, but also how
the diversity of large animals responds to climatic changes. "It
completely changes the vision of the ecosystem," says Torices.
"Moreover, we now understand that these dinosaurs disappeared very quickly
in geological time, probably in a catastrophic event. Climatic models show that
we may reach Cretaceous temperatures within the next century, and the only way
we can study biodiversity under such conditions is through the fossil
record."
Story Source:
The above post is reprinted from materials provided byUniversity
of Alberta. Note: Materials may be edited for content and length.
Journal Reference:
1.
Angelica Torices. Theropod dinosaurs from the Upper Cretaceous of
the South Pyrenees Basin of Spain.Acta Palaeontologica Polonica,
2013; DOI:10.4202/app.2012.0121