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Amphibians and Reptiles

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Dubious taxa

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What about the following dubious taxa: Actiosaurus, Pachygonosaurus and all the species of Pessosaurus. Where do you suggest to put them? Rnnsh (talk) 18:39, 12 January 2013 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2013-01-12T18:39:00.000Z","author":"Rnnsh","type":"comment","level":1,"id":"c-Rnnsh-2013-01-12T18:39:00.000Z-Dubious_taxa","replies":["c-Smokeybjb-2013-01-12T19:10:00.000Z-Rnnsh-2013-01-12T18:39:00.000Z"]}}-->

Pessosaurus has been classified as a shastasaurid before, so I'd put it under Shastasauridae with a question mark. Most species claimed to be shastasaurids are probably just basal merriamosaurs, but as far as I know Pessosaurus hasn't been included in any phylogenetic analyses. The others could be put under a new row called "incertae sedis", but then we need to know whether or not each one is a parvipelvian. Pachygonosaurus comes from the Triassic according to Shikama et al. (1978) so it's probably non-parvipelvian. Do you know anything about Actiosaurus? Smokeybjb (talk) 19:10, 12 January 2013 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2013-01-12T19:10:00.000Z","author":"Smokeybjb","type":"comment","level":2,"id":"c-Smokeybjb-2013-01-12T19:10:00.000Z-Rnnsh-2013-01-12T18:39:00.000Z","replies":["c-Rnnsh-2013-01-12T19:48:00.000Z-Smokeybjb-2013-01-12T19:10:00.000Z"]}}-->

Maybe we should call the raw "nomina dubia" or somthing and put it "at the base" of Ichthyosauria - Pessosaurus was not assigned to any particular group of ichthyosaurs since Maisch & Matzke (2000) (both "schemes" support the view that it is dubious...). And about Actiosaurus - is it even an ichthyosaur? There is a nice post on him at the Theropod Database Blog since it was originally thought to be a theropod... Rnnsh (talk) 19:48, 12 January 2013 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2013-01-12T19:48:00.000Z","author":"Rnnsh","type":"comment","level":3,"id":"c-Rnnsh-2013-01-12T19:48:00.000Z-Smokeybjb-2013-01-12T19:10:00.000Z","replies":["c-Smokeybjb-2013-01-12T19:57:00.000Z-Rnnsh-2013-01-12T19:48:00.000Z"]}}-->

Sounds good. As for Actiosaurus, if it's probably not an ichthyosaur at all, it's probably not worth putting on this template. Smokeybjb (talk) 19:57, 12 January 2013 (UTC)[reply]__DTELLIPSISBUTTON__{"threadItem":{"timestamp":"2013-01-12T19:57:00.000Z","author":"Smokeybjb","type":"comment","level":4,"id":"c-Smokeybjb-2013-01-12T19:57:00.000Z-Rnnsh-2013-01-12T19:48:00.000Z","replies":[]}}-->