I concur with Smitha,
This looks like a specimen of Ampharetidae. It is missing most of its branchiae. Note the little "papillae" on the right side of its head. These are most likely withdrawn buccal tentacles. Also, note how the notopodia with capillary chaetae disappear along the body (in the region where the brown gut content becomes visible). Cossurids have capillary chaetae along their entire body. Additionally, the tentacle of cossurids is a little further back (usually around chaetigers 3), whereas this appendage (branchia) is located right behind the prostomium. Additionally, it does not appear dorsally centered, which is what you would expect with a cossurid tentacle.
Best,
Michael
-----Original Message-----
From: annelida-bounces from oat.bio.indiana.edu <annelida-bounces from oat.bio.indiana.edu> On Behalf Of Sergio Taboada
Sent: Monday, June 18, 2018 9:14 AM
To: Doug Strom <dstrom from waterandair.com>
Cc: Annelida Listserver <annelida from magpie.bio.indiana.edu>; annelida-request from oat.bio.indiana.edu
Subject: Re: [Annelida] Identification of a polychaete
I totally agree with Doug. To me, it does not look like any spionid, ampharetid or terebellid, but it does look as a cossurid.
Best,
Sergi.
2018-06-18 14:40 GMT+01:00 Doug Strom <dstrom from waterandair.com>:
> If there is only one central "branchia" between two anterior setigers
> it could be *Cossura*, Cossuridae.
>> Cheers,
>> Doug
> _________________________________
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> Doug Strom
> Project Scientist - Aquatic Ecologist
> Water & Air Research Inc.
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> www.waterandair.com
>> On Mon, Jun 18, 2018 at 5:51 AM, smitha <smithack07 from gmail.com> wrote:
>> > Hi Friends,
> > Kindly help me to identify the polychaete. It is from 100m depth India.
> > Images attached.
> > cheers
> >
> > Dr. Smitha CK
> > Postdoctoral Fellow
> > Department of Marine Biology, Microbiology and Biochemistry School
> > of Marine Sciences Cochin University of Science and Technology
> > (CUSAT)
> > Cochin-16
> > Ernakulam
> > Kerala, India
> >
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--
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Sergi Taboada
The Natural History Museum of London
Life Sciences Dept., Invertebrates Division DC1, 6th floor Office 605
Cromwell Road, SW7 5BD, London (UK)
Telephone: +44 (0) 20 7492 5433
sergiotab from gmail.com
<https://www.researchgate.net/profile/Sergi_Taboada>Sergi Taboada in Researchgate <https://www.researchgate.net/profile/Sergi_Taboada>
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