[Annelida] Tiny fresh water worms
wormlab
via
annelida%40net.bio.net
(by wormlab from hawaii.edu)
Fri Nov 27 13:24:10 EST 2009
Looks like Aeolosoma.
-Chase Akins
Lab Tech - UH Wormlab
Ariel Chipman wrote:
> Dear annelid enthusiasts,
>> As a non-annelid specialist, I wonder if someone in this list can
> help with identifying some very small worms that have invaded a
> paramecium culture that I have been maintaining for teaching. The
> culture is fresh water, but is far from clean, and includes input
> from various different sources, so it is next to impossible to trace
> where they came from. They are roughly a millimeter long, have
> definite segments with chaetae, no obvious eyes, and no external
> mouthparts. They are generally soft bodied and very flexible. A hard
> pharynx is visible (but not obvious in the photos), and they seem to
> be feeding on plant matter, rather than the Paramecia that surround
> them (I infer this from green matter in their guts, and because I
> think I saw them browsing on plant material, but never attacking a
> Paramecium). I showed them to our local annelid expert, Nechama
> Ben-Eliahu. She suspects they are archiannelids, but they don't fit
> in with any of the keys she has. I attach two photos, which I have
> scaled down for sending, but can provide higher resolution versions
> (and more photos) if anyone is interested. One photo is lower
> magnification and shows two individuals of slightly different sizes.
> The second photo is a hihger magbnification of the head region, with
> a Paramecium for scale.
>> I would be happy for any help in identifying these critters.
>> Cheers,
>> Ariel
>> ------------------------------------------------------------------------
>>> ------------------------------------------------------------------------
>>> +=+=+=+=+=+=+=+=+=+=+=+=+=+
> Dr. Ariel Chipman
> Senior Lecturer
> Academic Curator of Aquatic Invertebrates
> Dept. of Evolution, Systematics and Ecology
> The Hebrew University of Jerusalem
> Givat Ram Campus
> Jerusalem 91904
> Israel
>> Office phone: ++972-2-6585816
> Lab telefax: ++972-2-6585809
> ariel.chipman from huji.ac.il
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