[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
----- Original Message -----
From: "Jerzy Dyczkowski" <email@example.com>
Sent: Thursday, April 04, 2002 11:10 AM
> How do we know what shape were "visible" or "outside" ears of extinct
We don't, except for mammoths. :-)
> and especially, that
> mammals had them and dinosaurs had not?
Phylogenetic bracketing: Among living animals, only placentals and
marsupials have them. So while it's ambiguous whether multituberculates and
triconodonts had them, we can be pretty certain that no dinosaur ever did.
- Re: Ears
- From: Dann Pigdon <firstname.lastname@example.org>
- From: Jerzy Dyczkowski <email@example.com>