Amniota ( was re: synapsids are reptiles )

["Jean-michel BENOIT" <Jean-Michel.BENOIT@gemplus.com>]

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\uc1\pard\plain\deftab360 \f0\fs20\cf0 David Marjanovic wrote :\par
<>\par
Hm. By definition Amniota diverges immediately, forming Theropsida and Sauropsida at the same time (except for their common ancestor, there is no amniote that belongs neither to Thero- nor to Sauropsida). BTW, the oldest known amniote, Hylonomus (still?), happens to be a sauropsid. :-)\par
<>\par
You mean there's no taxon assigned to Amniota alone (apart from Syna_ and Sauropsida)? What about Diadectomorphs? If it turns out they're Amniotes, are they Sauropsids or Synapsids?\par
Jean-Michel\par
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