Re: [dinosaur] Mammal recovery after K-Pg extinction happened fast + NOVA Rise of the Mammals

[Ruben Safir <ruben@mrbrklyn.com>]

On Wed, Oct 30, 2019 at 07:44:02AM -0400, Thomas Richard Holtz wrote:
> Ruben Safir (mrbrklyn.com) asks
> 
> > Loxolophus sp. - how do they know that this animal is related to hoofed
> > mammals based on just the skull?
> 
> Because common names don't reflect actual science...
> 
> "Hoofed mammals" are not characterized solely by the existence of hooves.
> It is a vernacular shorthand for "ungulate" (or even more, "euungulate").
> As with any taxon, they are characterized by traits from across the body,
> not solely from one portion that gives them their names. So tooth
> characters, braincase features, attributes of the bones associated with the
> ear, etc., can all be used to tell which major group of mammals a fossil is
> most likely related to.


OK - so how do they know that this animal, based on that skull, is
related to hoofed mammals.

> 
> P.S. Did you actually watch the documentary? Or read the paper?
> 
> The documentary is streaming on Amazon, and is available (at least to those
> in the US) at 
> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.pbs.org_video_rise-2Dof-2Dthe-2Dmammals-2Dzuzg8t_&d=DwIBAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=JMxjjbIZXCWilersPs1bzRx-3mUwTiQUzlyzWk7v7k4&m=P4JQDygm3X1hfvZy-J2n_FmKFjzhlXgzzUniSd_A1Ko&s=EaieY87CjSV2_43x4uFGcrk_msG1kwx7xxrR0ya6I0w&e=
>  
> 
> The paper is available at
> https://urldefense.proofpoint.com/v2/url?u=https-3A__science.sciencemag.org_content_early_2019_10_23_science.aay2268.abstract&d=DwIBAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=JMxjjbIZXCWilersPs1bzRx-3mUwTiQUzlyzWk7v7k4&m=P4JQDygm3X1hfvZy-J2n_FmKFjzhlXgzzUniSd_A1Ko&s=QNAnudgc8-aLuD7UQqCbRERW604m5B94HRixREJkZiQ&e=
>  
> 
> 

that is why I asked
> >
> 
> -- 
> 
> Thomas R. Holtz, Jr.
> Email: tholtz@umd.edu         Phone: 301-405-4084
> Principal Lecturer, Vertebrate Paleontology
> 
> Office: Geology 4106, 8000 Regents Dr., College Park MD 20742
> 
> Dept. of Geology, University of Maryland
> https://urldefense.proofpoint.com/v2/url?u=http-3A__www.geol.umd.edu_-7Etholtz_&d=DwIBAg&c=clK7kQUTWtAVEOVIgvi0NU5BOUHhpN0H8p7CSfnc_gI&r=JMxjjbIZXCWilersPs1bzRx-3mUwTiQUzlyzWk7v7k4&m=P4JQDygm3X1hfvZy-J2n_FmKFjzhlXgzzUniSd_A1Ko&s=NsYN07FWnaNYFB50zcJN29-_V89KsVV9F72E5lGU2MY&e=
>  
> 
> Phone: 301-405-6965
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> 
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> 
> Office: Centreville 1216, 4243 Valley Dr., College Park MD 20742
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>  
> Fax: 301-314-9843
> 
> Mailing Address:        Thomas R. Holtz, Jr.
>                         Department of Geology
>                         Building 237, Room 1117
> 
>                         8000 Regents Drive
>                         University of Maryland
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