[Annelida] Nephtys sp.

Jérôme Jourde via annelida%40net.bio.net (by jjourde from univ-lr.fr)
Tue Mar 15 05:40:59 EST 2011


Hello,

My name is Jerome Jourde, currently benthologist in the University of 
Brest (France). I'm a newcomer on the Annelida mailing, please forgive 
my possible blunders (particularly as regards my English).

I recently tried to identify several specimens of Nephtys that do not 
match with the various descriptions I have (Faune de France, Fauna 
Iberica, Polychaeta of Southern Africa, Rainer's papers). These 
specimens are mainly from South  Brittany (France). The following 
describes the main features of these specimens:

- Proboscis: 22 rows of 8-9 papillae, an odd dorsal papilla thinner and 
shorter than the other papillae, no odd ventral papilla
- 1st Segment: ventral cirri slightly thicker and longer than the 
antennae, dorsal cirri reduced to a small blister.
- gills appearing in the 4th setiger
- Median segments: notopodial and neuropodial presetal lamellae well 
developed, notopodial presetal lamellae bilobed; notopodial postsetal 
lamellae developed, almost reaching the gill, neuropodial postsetal 
lamellae reduced, no rugose area seen near the aciculae
- branchial cirri well developed, almost as large as the gill at least 
from the 25-30 th setiger to the end of the body(81 setigers)

Does anyone has encountered specimens corresponding to these 
characteristics?
Thanks for any help !


Jérôme Jourde



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