polynoid larval feeding

Bruno Pernet pernet at fhl.washington.edu
Wed Nov 22 12:25:09 EST 1995

Dear Annelida Subscribers,

I am working (with Nicole Phillips) on a paper describing 
feeding by larvae of the polynoid Arctonoe vittata.  
Planktotrophic larvae of polynoids (and other 
scaleworms) bear a bundle of long cilia attached posterior 
to the prototroch, on the left side of the mouth.  This 
bundle of cilia plays an important role in feeding in A. 
vittata, and probably in other scaleworms.  Can anyone 
out there help us with these questions concerning the 
distribution of this trait among polychaetes?

1.  does anyone know if any members of the 
Aphroditidae or Polyodontidae have planktotrophic 
larvae, and if so, do they bear a similar bundle of cilia on 
the left side of the mouth?  We have been unable to find 
any descriptions of development in aphroditids or 

2.  do nephtyid larvae also bear such a bundle of long 
cilia?  D.P. Wilson (J. Mar. Biol. Ass., U.K., 21:305, 1936) 
described early trochophores of Nephtys hombergi as 
having a "curious long tuft" of cilia on the left side of the 
mouth; his figured larva looks much like a polynoid larva.  
He raised these larvae from gametes stripped from 
adults, so it is very unlikely that he identified them 
wrongly!  We have not found confirming reports of this in 
N. hombergi or other nephtyids.

Any references or personal observations would be 
greatly appreciated.  This message will also appear in the 
next Chaetozone; I'm just too curious to wait.

Bruno Pernet
Friday Harbor Laboratories
620 University Rd
Friday Harbor, WA 98250
e-mail:  pernetb at zoology.washington.edu.

More information about the Annelida mailing list