In addition, if you take a slightly closer look at the structure of the
branchiae, you will easily see why Paraprionospio pinnata is called
pinnata!
Kristian Fauchald
Kristian Fauchald, Research Zoologist
Department of Zoology
NMNH, Smithsonian Institution
P.O.Box 37012,
NHB MRC 0163
Washington, DC 20013-7012
phone: 202.633.1777
fax 202.357.3043
fax: 202.357.3043
>>> Scott Jones <msjoneser at gmail.com> 01/26 3:41 PM >>>
Thanks everyone, for the replies.
Well, it seems that I was under the impression that the first pair of
appendages on
S. benedicti were the first pair of branchiae, not palps. So it confused
me
when the keys I was using described Streblospio as
only having one pair of branchiae. I thought
that this either had to be a discrepancy on the part of the keys (highly
unlikely)
or a discrepancy on the part of the photographers (more likely).
In our neck of the woods, two common spionids are hard to distinguish if
you
haven't had the epiphany I've had today: S. benedicti and Paraprionospio
pinnata.
S. benedicti, I think, usually retains its palps and one pair of branchiae
whereas P.
pinnata usually loses its palps and often loses its last pair of
branchiae.
When you
have such a case, you get a specimen that looks an awful lot (at first
glance) those
pictures of S. benedicti you all found on the web.
Thanks again for being a tremendous resource!!
Scott Jones
On 1/26/06, Les Watling <watling at hawaii.edu> wrote:
>> Google images produced only 3 images of this beast. Two were from
> South Carolina and are of preserved animals where all the color is
> gone. The third is from University of Delaware and is a beautiful
> shot of live (?living) worm. The collar is visible as are the brown
> and white striped gills.
>> don't know about other images of S. benedicti, but you could use the
> U Del photo as the standard.
>> Best,
> Les.
>> At 05:51 AM 1/26/2006, Scott Jones wrote:
> >Hi all,
> >
> > I was wondering if anyone out there is actively photographing
> > polychaetes under a microscope-- we do it a fair bit in
> >our lab when we find something 'new.'
> >
> > I am specifically looking for images of Streblospio benedicti. I
> > am fairly certain that this species is mis-represented in
> >images on the web.
> >
> >thanks for any help,
> >
> >Scott Jones
> >Benthic Ecology Lab
> >Smithsonian Marine Station, Fort Pierce, FL
> >_______________________________________________
> >Annelida mailing list
> >Post: Annelida at net.bio.net> >Help/archive: http://www.bio.net/biomail/listinfo/annelida> >Resources: www.annelida.net
>>> Les Watling
> Professor of Oceanography and
> Pew Fellow in Marine Conservation
> Affiliate, Yale Peabody Museum
> Darling Marine Center
> University of Maine
> Walpole, ME 04573
>> January to June 2006:
> Visiting Professor of Zoology
> University of Hawaii at Manoa
> Edmondson Hall
> Honolulu, HI 96822
> cell phone: 808-772-9563
>>>>>-------------- next part --------------
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