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Sejarah evolusi kadal dan ular direkonstruksi menggunakan dataset molekul besar

Date:

September 19, 2012

Source:

Stony Brook University

Summary:

Sebuah studi baru telah dimanfaatkan dataset molekul besar untuk merekonstruksi sejarah evolusi kadal dan ular . Hasil mengungkapkan temuan mengejutkan tentang evolusi ular : bahwa ular yang kita lihat hidup di permukaan saat ini muncul dari nenek moyang yang hidup di bawah tanah .....read more

Evolutionary history of lizards and
snakes reconstructed using massive molecular dataset

Date:

September 19, 2012

Source:

Stony Brook University

Summary:

A new study has utilized a massive molecular dataset to reconstruct the
evolutionary history of lizards and snakes. The results reveal a surprising
finding about the evolution of snakes: that most snakes we see living on the
surface today arose from ancestors that lived underground.

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

A new study, published online in Biology
Letters on Sept. 19, has utilized a massive molecular dataset to reconstruct the
evolutionary history of lizards and snakes. The results reveal a surprising
finding about the evolution of snakes: that most snakes we see living on the
surface today arose from ancestors that lived underground.

The article, entitled "Resolving the phylogeny of lizards and snakes
(Squamata) with extensive sampling of genes and species," describes
research led by John J. Wiens, an Associate Professor in the Department of
Ecology and Evolution at Stony Brook University. The study was based on 44
genes and 161 species of lizards and snakes, one of the largest genetic
datasets assembled for reptiles.

The results show that almost all groups of snakes arose from within a bizarre
group of burrowing blind snakes called scolecophidians. This finding implies
that snakes ancestrally lived underground, and that the thousands of snake
species living today on the surface evolved from these subterranean ancestors.

The authors suggest that there are still traces of this subterranean
ancestry in the anatomy of surface-dwelling snakes. "For example, no
matter where they live, snakes have an elongate body and a relatively short
tail, and outside of snakes, this body shape is only found in lizards that live
underground," said Professor Wiens. "Snakes have kept this same basic
body shape as they have evolved to invade nearly every habitat on the planet --
from rainforest canopies to deserts and even the oceans."

Co-authors of the study include Carl R. Hutter, Daniel G. Mulcahy, Brice P.
Noonan, Ted M. Townsend, Jack W. Sites Jr., and Tod W. Reeder. The work was
performed at Stony Brook University, Brigham Young University, and San Diego
State University.







Story Source:

The above story is based on materials provided
by Stony Brook University. Note:
Materials may be edited for content and length.







Journal Reference:

1.   
J. J. Wiens, C. R. Hutter, D. G. Mulcahy, B. P. Noonan, T. M. Townsend, J.
W. Sites, T. W. Reeder. Resolving the phylogeny of lizards and snakes
(Squamata) with extensive sampling of genes and species. Biology
Letters, 2012; DOI: 10.1098/rsbl.2012.0703

http://www.sciencedaily.com/releases/2012/09/120919081834.htm

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