Millipedes border control
This is the border between the two species of millipedes. Credit: Bob mesibov
A mysterious line where two millipede species meet has been mapped in northwest Tasmania
Both species are common in their respective ranges, but the two millipedes cross very little into each other's territory. The 'mixing zone' where they meet is about 230 km long and less than 100 m wide where carefully studied. The mapping was done over a two-year period by Dr Bob Mesibov, who is a millipede specialist and a research associate at the Queen Victoria Museum and Art Gallery in Launceston, Tasmania. His results have been published in the open access journal ZooKeys.
'I have no idea why the line is so sharp', said Dr Mesibov. 'The boundary runs up and down hills, crosses rivers and different bedrocks and soils, and ignores vegetation type and climate differences. Its position and its sharpness seem to be the result of an unexplained biological arrangement between the two millipede species.'
Biogeographers use the term 'parapatry' for the case where two species ranges meet but do not overlap, or overlap very little. Dr Mesibov said that parapatry has been reported before in other species of millipedes and in other terrestrial invertebrate animals, in Tasmania and elsewhere in the world. However, parapatric boundaries often parallel a geographical feature, such as a ridgeline, or a steep rainfall gradient.
There does not seem to be an ecological or a geographic explanation for this particular boundary, or for any part of it. It is also longer than any other parapatric boundary I know about. At 230 km, it is 50% longer than the boundary between England and Scotland, and the 'border control' is a lot better than what we humans can do.'
The two millipede species, Tasmaniosoma compitale and T. hickmanorum, are in the same genus and thought to be closely related. They were first scientifically described in 2010, by the same author and again in ZooKeys. The parapatric boundary was mapped as a background study for later investigations of speciation in this group of millipedes, and of the mechanism of parapatry.
Source: Pensoft Publishers
More from News
Operation Polaris - Seizure of more than 60 tonnes of illegal tobacco
A joint law enforcement operation has charged two men with alleged importation and bribery offences ...
Thebarton Oval has been renamed Adelaide Airport Stadium
Thebarton Oval has been renamed Adelaide Airport Stadium starting from the 2012 footy season as ...
Australian Government receives valuable Prisoner of War records from Japan
Historical records of former Australian Prisoners of War (POW) held by the Japanese during the ...
Virgin Australia partners with V8 Supercars as official domestic airline
Virgin Australia and V8 Supercars today announced a partnership that will see it become the ...
Email to a friend
Print versionRate this article
Latest News
- Miniature 9-Axis Inertial Module with 32-bit Processing Unit from STMicroelectronics
- Engineers continue to play a vital role in community safety
- The most powerful electric car on earth
- NASA's Kepler mission have detected two Earth-sized planets orbiting a distant star
- A dive into inner brain network
- Canon EOS-1D X
- Physicists punched a hole in Einstein's theory of special relativity
- Engineers continue to play a vital role in community safety
- Miniature 9-Axis Inertial Module with 32-bit Processing Unit from STMicroelectronics
- Indonesian Government has committed to banning all live cattle imports from Australia
<a href="http://www.angeljackets.com/products/X-Men-First-Class-Leather-Jacket-.html">x men first class jacket</a>
http://www.e-moncler.com/ E-Moncler.com
http://www.e-moncler.com/ Moncler clothing online
http://www.e-moncler.com/moncler-vest/
http://www.e-moncler.com/moncler-womens/
http://www.e-moncler.com/moncler-mens/
http://www.e-moncler.com/moncler-kids/
http://www.e-moncler.com/moncler-polo/
http://www.e-moncler.com/moncler-boots/
http://www.e-moncler.com/moncler-hoodies/
http://www.e-moncler.com/emu-boots/
http://www.watchessalt.net
http://www.forkshoes.com/short-boots.html
Post your comment