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J. of Zool. Syst. & Evol. Res.

Geoff Read g.read at niwa.cri.nz
Mon Nov 6 17:26:30 EST 2000


Many thanks to Günter Purschke for his information earlier. And, for those 
interested, here to round off is the Salvini-Plawen abstract also:    

Salvini-Plawen, L. v. 2000. What is convergent / homoplastic in Pogonophora. 
Journal of Zoological Systematics & Evolutionary Research 38(3):133-147.


Characters of Pogonophora, including Perviata (Frenulata and 
Scleronlinida) and Vestimentifera, are critically analysed and the 
characters re-evaluated with respect to their reliability in determining 
relationships with Annelida-Polychaeta in general and with Oweniidae in 
particular, as well as with Oligomera. In addition to several differentiations 
which possibly express parallelisms, only a few characters reflect 
trustworthy information based on the current state of knowledge. These, 
however, still include 'sets' of both Annelida-Polychaeta features and 
Oligomera features; despite the more recent trend to regard the 
Pogonophora as annelids, no unequivocal preference can be given as to 
which of these 'sets' is convergent / homoplastic. The intra-epithelial nevous 
system without true cerebral  ganglia, typical of Epineuralia  as well as 
Pogonophora and Oweniidae, is here considered to represent the 
paedomorphic peripheral-epidermal larval system of Gastroneuralia in  
contrast to the gangliated gastroneural adult system.

  Geoff Read <g.read at niwa.cri.nz>

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