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Re: Thalattoarchon, giant ichthyosaur from Middle Triassic of Nevada
Dnia 7-01-2013 o godz. 23:44 David Marjanovic napisał(a):
> > Its presence documents the rapid evolution of modern marine
> > ecosystems in the Triassic where the same level of complexity as
> > observed in today?s marine ecosystems is reached within 8 My after
> > the Permian-Triassic mass extinction and within 4 My of the time
> > reptiles first invaded the sea.
8, 4... or sudden divine creation if we read the incomplete fossil record
literally... ;) Or is it just that reptiles started to invide the water BEFORE
the P/T. I know, I know...
> > This find also indicates that the biotic recovery in the marine realm
> > may have occurred faster compared with terrestrial ecosystems, where
> > the first apex predators may not have evolved before the Carnian.
> Uh, what about *Erythrosuchus* and the like?
>From the paper:
"Although large predators such as the rauisuchians Erythrosuchus and
Ticinosuchus appear in the terrestrial rock record in the Anisian (38), it has
been suggested that full recovery on land was not reached until the Late
Triassic, 30 My after the P/T extinction (39)."
And one more thing: as a layman, I see no good indicator of the original shape
and lenght of the - largerly unpreserved - rostrum, so the total body lenght
value and its implications may not be valid...