Re: K-T extinction rate, percentages etc.

["T. Michael Keesey" <keesey@gmail.com>]

Since these figures are based on arbitrary ranks and arbitrarily
monophyletic or paraphyletic taxa, I don't think they are of
particular interest..

On 5/26/05, Vladimír  Socha <Seismosaurus@seznam.cz> wrote:
> "PISCES"
> Chondrichthyes     5        3          60%

Fine.
 
> Ostheichthyes     13        5          38

_Osteicthyes_ should include all those below as well. However, this
figure is probably pretty close to the figure for _Actinopterygii_,
which would be of interest.
 
> "AMPHIBIA"        12        4          33
> 
> "REPTILIA"
> Chelonia          18        2          11

Fine.
 
> Eosuchia           1        0           0

Is this taxon still used? What is the "1", anyway?
 
> Crocodilia         4        1?         25?

Fine.
 
> Eolatacertilia     1        1         100

???

> Lacertilia        15        4?         27?
> 
> Serpentes          2        0?          0?

No point in separating these two.
 
> Saurischia         8        8         100

Should include the figures for _Aves_.
 
> Ornithischia      14       14         100
> 
> Pterosauria        ?        ?         100

Cool.
 
> "AVES"             ?        ?           ?
> 
> "MAMMALIA"
> Microtuberculata  11        4          36
> 
> Marsupialia        4        3          75
> 
> Placentalia        9        1          11
> 
> TOTAL            117       50          43%

It would be interesting to compare these against figures for niches or habitats.

Useless (mmmaybe species):
> K-T extinction event
> Taxonomical (Linnean) unit     Losses (in percents)
> Phyle(-um)     0 %
> Classes        1
> Orders        10
> Families      14
> Genera        38
> Species     65-70
> Individuals    ?

--Mike Keesey