Photo a1 and a2 could be an oligochaete cocoon, though at that depth if you don't have a high oligochaete density or within the plume of a river discharge, it may be something else. I don't have these books at my disposal anymore - so this is a very vague recollection - but I think the big thick 1920's The Oligochaeta book or the little black Oligochaetes of the British Isles book (Brinkhurst I think) have illustrations of different cocoons for different taxa.
-David
_____________________________________________________________________________
David Gillett, Ph.D.
Ecologist
Southern California Coastal Water Research Project
3535 Harbour Blvd, Suite 110
Costa Mesa, CA 92626
-----Original Message-----
From: annelida-bounces from oat.bio.indiana.edu [mailto:annelida-bounces from oat.bio.indiana.edu] On Behalf Of Víctor Aramayo
Sent: Friday, December 06, 2013 1:20 PM
To: annelida from net.bio.net
Subject: [Annelida] Identification
Dear colleagues
Could someone help me in identifying these pictures?
a1(1,2). It is simply a copepod egg? I have doubts. Sorry, the pictures are not very good.
Data: 43 um (sieve)
Sublittoral sediments, Central Peru
- Depth: about 100 m
and
b2(1,2)
Thaks in advance.
Víctor
