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[Annelida] RE: Oligochaete with anal cirri?

Geoff Read via annelida%40net.bio.net (by Geoffrey.Read from niwa.co.nz)
Thu Feb 2 00:34:02 EST 2012

And here is a couple of small images, one of either end.  Magnification x200 or so.


> -----Original Message-----
> From: annelida-bounces from oat.bio.indiana.edu [mailto:annelida-
> bounces from oat.bio.indiana.edu] On Behalf Of Geoff Read
> Sent: Thursday, 2 February 2012 2:58 p.m.
> To: Polychaete mailing list
> Subject: [Annelida] Oligochaete with anal cirri?
> Dear all,
> Quick question? Do oligochaetes ever have a pair of anal cirri?  I have been
> looking at offshore samples from mobile coarse sands with some interesting
> small worms in them, and there is this apparent oligochaete (or not) which has a
> lovely pair of delicate anal cirri.  It has a long prostomium, or perhaps it's the
> pygidium if I've oriented it wrong way round (it's hard to say), is exceedingly thin
> (0.15 mm w, & TL 10 mm) like a marine oligochaete, has mixed capillaries and
> slightly thicker shorter unifid S-shaped single chaetae.  What do you reckon it
> could be if not an oligochaete?  There are no tentacles along the body (as in
> cirratulids and affiliates). There is a polygordiid genus which has chaetae, but
> apparently not along the whole body as this worm has.
> Thanks in advance for your ideas to enlighten me.

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