IUBio

Poecilogony

SRice1947 at aol.com SRice1947 at aol.com
Fri Jul 23 16:25:42 EST 1999


Dear poecilogonites,

Those of you who attended the Evolution meetings in Madison, 
Wisconsin this summer may have seen Stefan Schulze present his thesis 
work on the biogeography and molecular genetics of Streblospio. He 
sampled populations on the east coast, west coast, and Gulf of Mexico 
including both species of Streblospio (benedicti and gynobranchiata). 
Gene sequences of the mitochondrial cytochrome oxidase subunit 1 
(CO1) were determined for each population along with morphological and 
reproductive data. The manuscript from this work will be submitted later 
this summer and the Master's Thesis should be on file in the library at the 
University of South Florida, Tampa.  

I don't want to spoil the fun of the publication, but the bottom line is that 
the CO1 sequences have proven useful in detecting recent speciation 
events in spionids. The division of Streblospio into two North American 
species appears to be substantiated by the molecular data (fortunately 
for me!). The North Carolina populations of Streblospio that exhibit 
different modes of larval development as described by Lisa Levin appear 
to be the same species based upon CO1 sequences.  

We are collecting similar information on Polydora cornuta (ligni) this 
summer and hope to have a story to tell by next summer's Evolution 
meeting. Stay tuned for further announcements.  

Stan Rice
Department of Biology
University of Tampa
Tampa, FL 33606
(813) 253-3333
srice at alpha.utampa.edu


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