[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
At 11:58 PM 12/12/97 PST, Jaime Headden wrote:
>like diplodocids than they do the one skull belonging to
>*Antarctosaurus*. The skull of *Argentinosaurus*, ...
Oops, forgot about those.
>o = ancestrous cetiosaur
>*Euhelopus* and kin
>| | |
>Macronaria | *Mamenchisaurus*
>| | |
>Camarasaurids Titanosaurids Diplodocids
>& & &
>Brachiosaurids Saltasaurines Dicraeosaurids
>If this clade is acurate, or close to the truth, than titanosaurs are
>basal diplodocids stemming from advanced "euhelopodids",
This cladogram has one problem: Euhelopus and Mamenchisaurus have 17
cervicals, and the others all have 10-12 cervicals. Combined with other
factors, I think this makes a *clade* containing both _Euhelopus_ and
_Mamenchisaurus_ at least a decent possibility.
It certainly makes _Euhelopus_ and unlikely ancestor for the
camarasaurid/brachiosaurid clade, and _Memenchisaurus_ and unlikely
ancestor for the diplodocid clade.
May the peace of God be with you. email@example.com