Some taxonomy questions

Aaron Baldwin jscat1 at ptialaska.net
Thu Jul 18 02:17:14 EST 1996


Dear everyone,

I would like to first like to thank all of you who responded to my 
inquiry on polychaete ecology. Once again, my email was down for about 
three weeks, so if you wrote me and I didn't respond, I didn't get the 
message. My e-mail was down for another few days recently (right after 
my second post, of course) and I lost those messages also.

We are now full into the taxonomic portion of our study. It is hard, as 
the keys we have are for Washington state, British Columbia, Eastern 
USSR, and Pt. Barrow Alaska. Most everything is keying out fine, but I 
realize that we may be dealing with species that are not in the keys we 
are using. I am using "cf" in between a great number of our species 
names. I thought I might throw out a few of the anomolies to you all to 
see if someone might know.

One kind of important species we are getting is Chaetozone cf. setosa. 
It agrees with the keys fine, except that in Hobson & Banse it says that 
this species has only acicular setae nearly encircling the posterior 
segments. I don't know if that meant that only the acicular seate 
actually nearly encircle the segment, or that there are no other seate 
present but acicular (I hope that made sense). Ours has both 
long capillary and acicular setae that seem to alternate on the lateral 
margins, but seem to be only acicular setae that actually nearly make it 
to the center of the dorsal and ventral region. Is this still C. setosa?
Or are there others that should be expected in Southeast Alaska? 

I have many more questions, but am out of time. Real quick though, are 
there any keys to the Goniadae that rely on feature besides the pharynx? 
About one in fifty of ours have the pharynx out at all. I have wrecked a 
vast number through dissection, mashing, etc. trying to find teeth.

Thanks - Aaron

Aaron Baldwin <jscat1 at ptialaska.net>



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