a late Pilidium larva

Images made through a microscope. All subject types.

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Franz Neidl
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Joined: Wed Jan 14, 2009 11:59 am
Location: Italy

a late Pilidium larva

Post by Franz Neidl »

The Pilidium larva is a stage of the Ribbon worms (Nemertine) helping them to a better dispersal in the sea.
The picture shows a late state of the larva, which was about 400 µm high.
You can see also the future animal - specially in the second picture. "The young worm grows within the still existing ectodermal structures of the larva, which may continue to feed in the plankton. Its metamorphosis proper takes place when the juvenil worm breaks out of it larval container, often ingesting the larval remnants" (Larink O., W. Westheide: Coastal Plankton. Photo Guide for European Seas, München, 2006, p.64).

Obj. 20x DIC, without eyepiece
Obj. 40x DIC, without eyepiece




Wim van Egmond
Posts: 826
Joined: Tue Aug 15, 2006 9:28 am
Location: Berkel en Rodenrijs, the Netherlands

Post by Wim van Egmond »

Very nice Franz,

isn't it amazing that it almost looks like a human embryo?


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Joined: Sun Aug 15, 2010 1:43 pm

Post by Mitch640 »

It must be absolutely maddening to only see a tiny window of time in the complete cycle of these creatures. I am just a hobbyist and it's bad enough, I can't image what a researcher goes through. :(

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