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THE LAST CHORISTODERES
On choristoderes, Tim wrote..
> The youngest record for the Choristodera is Oligocene (the
> appropriately-named _Lazarussuchus_).
_Lazarussuchus_ was recently excluded from the Choristodera by Gao
and Fox - they made it it the sister-taxon of this clade. Therefore
Eocene champsosaurs are the youngest members of the group.
_Lazarussuchus_ (living up to its name with a ghost lineage that
extends from perhaps the Late Triassic to the Oligocene) was aberrant
compared to true choristoderes, being relatively short skulled and
Why choristoderes are so elusive in the fossil record is just wierd.
Maybe they were always rare and (???) sometimes inhabited
environments where preservation was infrequent. I've never handled
any choristodere material, but I wonder if isolated choristodere
elements possess too few diagnostic features to be identified.
Choristoderan elusivity has been much discussed in the literature (e.g.,
Storrs and Gower, Evans and Hecht). Is elusivity a word?
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