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[Annelida] Mystery worm rock Sabellariidae?

John Zardus via annelida%40net.bio.net (by zardusj1 from citadel.edu)
Sat Jan 2 10:40:56 EST 2010


Yes, these are almost certainly the sabellariid polychaete Sabellaria
floridensis which I have found in South Carolina.

 

Best, John Zardus

 

John D. Zardus, Ph.D.

Associate Professor

Department of Biology

The Citadel

171 Moultrie St.

Charleston, SC 29407

USA

 

 

From: annelida-bounces from oat.bio.indiana.edu
[mailto:annelida-bounces from oat.bio.indiana.edu] On Behalf Of Barrie
Jamieson
Sent: Friday, January 01, 2010 4:57 PM
To: Spinnaker; annelida from magpie.bio.indiana.edu
Subject: RE: [Annelida] Mystery worm rock Sabellariidae?

 

They very much resemble tubes formed by Sabellaridae (Polychaeta). I
understand that Phragmatopoma forms considerable reefs in American
waters.
Regards,
Barrie Jamieson

Barrie Jamieson B.Sc., Ph.D., D.Sc.
Emeritus Professor
Department of Zology and Entomology
School of Integrative Biology
University of Queeensland
Brisbane
Queensland 4072
Australia



-----Original Message-----
From: annelida-bounces from oat.bio.indiana.edu on behalf of Spinnaker
Sent: Tue 12/29/2009 1:42 AM
To: annelida from magpie.bio.indiana.edu
Subject: [Annelida] Mystery worm rock

Hello,



I'm hoping for some help with a mystery rock found on a southern North
Carolina (USA) beach fronting the Atlantic Ocean (image attached).



A preliminary guess is that they are Serpulid colonies, but the form
seems a
little strange for that.



The rocks are occasionally found washed ashore on the sandy beach. They
have
been surf-worn, and are in rounded, flattened masses 5-30 cm in greatest
diameter. Their varied colors (black, gray, orange-brown, light tan
suggest
that they have been buried in differing sediments.



Close examination reveals that the rocks are highly porous and composed
of a
mass of tubes. The tubes appear calcareous, with no constituent sand
grains
visible through a loupe. The tubes are eroded open on the rock's
exterior,
and are circular, oval, or indented-oval in cross section, 1-3 mm in
diameter.



I have numerous higher resolution images if needed.



Many thanks for any help with this puzzle. 



Cheers,



Blair Witherington



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