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Ular baru yang agak kurus dan panjang merangkak dari salah satu hotspot
keanekaragaman hayati bumi
A rather thin and long new snake crawls out of one of Earth's
biodiversity hotspots
Date:
November 27,
2012
Source:
Pensoft Publishers
Summary:
A team of Ecuadorian and American scientists have
discovered a new species, belonging to a neotropical group of remarkably long
arboreal (tree-dwelling) snakes: the blunt-headed vine snakes, from the Choco
biodiversity hotspot in northwestern Ecuador. DNA data suggest that the closest
relative of the new species lives on the other side of the Andes.
..................
Field and laboratory work by a group of zoologists led by
Omar Torres-Carvajal from Museo de ZoologÃa QCAZ, Pontificia Universidad
Católica del Ecuador, has resulted in the discovery of a new species of
blunt-headed vine snake from the Chocoan forests in northwestern Ecuador. This
region is part of the 274,597 km2 Tumbes-Chocó-Magdalena hotspot that lies west
of the Andes.
The study
was published in the open access journal ZooKeys.
Blunt-headed
vine snakes live in an area comprising Mexico and Argentina, and are different
from all other New World snakes in having a very thin body, disproportionately
slender neck, big eyes, and a blunt head. They live in trees and hunt frogs and
lizards at night. The new species described by Torres-Carvajal and his collaborators
was named Imantodes chocoensis and increases the number of species in
this group of snakes to seven.
Snakes
collected as far back as 1994 and deposited in several Ecuadorian and American
natural history museums were also examined. The authors were soon surprised
with an interesting discovery. Some individuals from the Ecuadorian Chocó
lacked a big scale on their face that is present in all other blunt-headed vine
snakes from the New World. Other features, as well as DNA evidence, indicate
that these Chocoan snakes actually belong to a new species. DNA data also
suggest that its closest relative is a species that inhabits the Amazon on the
other side of the Andes.
'One
possible explanation for the disjunct distribution between the new species and
its closest relative is that the uplift of the Andes fragmented an ancestral
population into two, each of which evolved into a different species, one in the
Chocó region and the other in the Amazon' said Dr Torres-Carvajal.
Story
Source:
The above
story is based on materials provided by Pensoft Publishers. Note: Materials may be edited
for content and length.
Journal
Reference:
- Omar Torres-Carvajal, Mario Yanez, Diego Quirola, Eric N. Smith, Ana Almendáriz. A new species of blunt-headed vine snake (Colubridae, Imantodes) from the Chocó region of Ecuador. ZooKeys, 2012; 244 (0): 91 DOI: 10.3897/zookeys.244.3950
