Thank you very much for everyone's thoughts! I did not sample the specimen. But a friend and colleague of mine, who was asked for advice by another colleague, sent me this picture. I hope that they put it in a tank to rear the specimens and determine what species it is. However, I am not sure, what they did with it. I will keep you posted, if I can find out more!
Thank you!
Michael
________________________________
Michael Reuscher, Ph.D.
Harte Research Institute for Gulf of Mexico Studies
Texas A&M University - Corpus Christi
6300 Ocean Drive, Unit 5869
Corpus Christi, Texas 78412-5869
U.S.A.
________________________________
From: Sarah Woodin [swoodin from gmail.com]
Sent: Tuesday, March 31, 2015 2:31 PM
To: James Blake
Cc: Reuscher, Michael; annelida from net.bio.net
Subject: Re: [Annelida] polychaete egg case
also some maldanids such as Axiothella mucosa (Bookhout and Horn 1949, Wilson 1986). If it is Axiothella, you should be able to tell from the tube to which the egg mass is attached. Maldanid tubes typically have little stretch but do hold their cylindrical shape when excavated. They break under pressure.
as Jim said, let us know.
On Tue, Mar 31, 2015 at 4:11 PM, James Blake <jablake9 from gmail.com<mailto:jablake9 from gmail.com>> wrote:
Michael,
Pear-shaped egg cocoons of this type are well-known for orbiniids. I
reported these for Leitoscoloplos pugettensis and they are well known in
other orbiniid genera and species as well (Blake 1980; Chapman 1965; Okuda
1946; Schroeder & Hermans 1975; Thorson 1946, etc.). The cocoons I
described for L. pugettensis, were ca. 2 cm long plus the long extension
that anchored it in the sediment. The one you are holding is ca. 4 cm long,
so either a much larger orbiniid, or another kind of polychaete. Similar
cocoons are known for capitellids. I have also recorded a cocoon like this
for the spionid Parascolelepis cf. tridentata in Blake (2006).
Let us know what species you end up calling this.
Jim Blake
jablake9 from gmail.com<mailto:jablake9 from gmail.com>
On Tue, Mar 31, 2015 at 10:40 AM, Reuscher, Michael <
Michael.Reuscher from tamucc.edu<mailto:Michael.Reuscher from tamucc.edu>> wrote:
> Dear friends and colleagues,
>> Can you help me identify the egg case in the picture below? It looks like
> a polychaete egg case to me. Can anybody confirm this and maybe even
> suggest which family, genus, or even species this may belong to? It was
> found at the Florida Keys.
>> Thank you!
> Michael
>> ________________________________
> Michael Reuscher, Ph.D.
> Postdoctoral Research Associate
> Harte Research Institute for Gulf of Mexico Studies
> Texas A&M University - Corpus Christi
> 6300 Ocean Drive, Unit 5869
> Corpus Christi, Texas 78412-5869
> U.S.A.
> ________________________________
>>> [cid:image001.jpg from 01D06AEF.808A7530]
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