|Copyright: kapil koltharkar (kapildk)
|Date Taken: 2010-11-25|
|Camera: Nikon coolpix L110|
|More Photo Info: [view]|
|Photo Version: Original Version|
|Date Submitted: 2010-11-25 9:16|
|[Note Guidelines] Photographer's Note|
|Today i was successful to capture this specie. Several times i saw this type of snail without the shell near a stop where i wait for bus. I found on google that, this is known as SLUG.|
SLUG: Slug is a common name that is normally applied to any gastropod mollusc that lacks a shell, has a very reduced shell, or has a small internal shell. This is in contrast to the common name snail, which is applied to gastropods that have coiled shells that are big enough to retract into.
All slugs are descended from snails that gradually lost or reduced their shells over time. However, the shell-less condition has arisen many times independently during the evolutionary past, and thus the category "slug" is emphatically a polyphyletic one. The various groups of slugs are not closely related, despite a superficial similarity in the overall body form.
There are marine and terrestrial slugs, but the common name "slug" is most frequently applied to air-breathing land species, while the marine forms are known as sea slugs. Land gastropods with a shell that is not quite vestigial, but is too small to retract into (like many in the family Urocyclidae), are known as semislugs.
Slugs, like all other gastropods, undergo torsion (a 180º twisting of the internal organs) during development. Internally, slug anatomy clearly shows the effects of this rotation, but externally the bodies of slugs appear rather symmetrical, except for the positioning of the pneumostome, which is on one side of the animal, normally the right hand side.
The soft, slimy bodies of slugs are prone to desiccation, so land-living slugs are confined to moist environments and must retreat to damp hiding places when the weather is dry.
Thanks for watching.
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- [2010-11-25 13:35]
Hi Kapil,this is truely new and very interesting,you work very well in this terrible backlight for a very nice result,great sharpness and details,a very impressive specie,maybe a first time for TN.Thanks for share,have a nice day,Luciano.