[Annelida] Oligochaete with anal cirri?
(by Geoffrey.Read from niwa.co.nz)
Wed Feb 1 20:57:59 EST 2012
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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