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Quoting darren.naish@port.ac.uk:

> Check any of Rieppel's papers from the last 4-5 years. 
> Eusauropterygia (proposed by Tscahnz 1989, not Storrs 
> 1993) is used as the nothosauroid + pistosauroid clade. 
> Pachypleurosaurs, previously argued by Rieppel (1998) as 
> sister group to Nothosauroidea, are presently regarded as 
> the sister-group to the Eusauropterygia. 
> Pachypleurosauria + Eusauropterygia = Eosauropterygia. 

"thick-sided lizards" + "true lizard wings" = "dawn lizard wings"???

> Eosauropterygia + Placodontia = Sauropterygia, thus 
> placodonts are the most basal sauropterygians known at 
> present.

I'm sorry; where exactly to plesiosaurs fit into all of this?

Nick Pharris
Department of Linguistics
University of Michigan