[Annelida] Hobsonia florida

Geoff Read via annelida%40net.bio.net (by g.read from niwa.co.nz)
Mon Sep 17 23:16:12 EST 2007

Chris Fishel wrote:
> I recently found some specimens of /Hobsonia florida / in samples from 
> the Lehigh River near Palmerton , PA.   How common of an occurrence is 
> this?  It’s quite far (200+miles) from the coast, although it is 
> connected by the Delaware River .  Any input would be appreciated.  

Hello Chris,

My contribution isn't worth much because I have experience with neither 
freshwater Ampharetidae nor with Hobsonia florida, but it seems a little 
unusual to me. From what info I have access to I have the impression H. 
florida, while likely present 'nearby' in Chesapeake Bay and Delaware 
Bay, would not range much beyond the upper estuarine environment. I 
couldn't immediately see any literature indicating it was known in real 
freshwater in the USA. There are other ampharetids elsewhere such as the 
Pontocaspian Hypania invalida that do occur in freshwater.

Someone here may have access to this:

Zottoli, R. A. 1966: Life history, morphology, and salinity tolerance of 
the ampharetid polychaete Amphicteis floridus Hartman 1951. Ph.D. 
thesis. University of New Hampshire

   Geoff Read <g.read from niwa.co.nz>

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