Re: Precocial young Re: Yabeinosaurus, earliest viviparous squamate

["Richard W. Travsky" <rtravsky@uwyo.edu>]

On Tue, 19 Jul 2011, David Marjanovic wrote:

> >  How much parental care is there with these live birth reptiles?
>
> In squamates? None that I can think of.
>
> >  Does this mean parental care evolved with live birth, or would the
> >  young have been first been precocial, and parental care evolving
> >  later?
>
> These two characters are independent. You can have live birth without 
> parental care (as in at least some extant live-bearing squamates), and you 
> can have parental care without live birth (as in extant crocodiles and 
> birds).

Thanks, not quite what I was thinking of. If there is live birth without
parental care, then they're precocial young. If there is live birth
with parental care, then they're not precocial. I wasn't clear on that.