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Tyrannosaur eggs amd brooding
:> The alleged eggs of Tyrannosaurus bataar occur in pairs, possibly
:> arranged in a linear row. The number of pairs in a linear row, however,
:> is unknown.
> We have a pair of tyrannosaurid eggs in the geology museum here at
>ASU. The species and genus are unknown (I haven't spoken with Dr. Dietz
>about these eggs, so I can only tell you what it says on the display
>placard.) The two eggs are pretty broken up, but the basic form is
>rather like a pair of giant Tylenol. They're about 16 inches long, but I
>imagine they would be compressed to 12 inches or so if they weren't so
>broken up. The matrix has only been partially removed from them, so they
>are still oriented as they were found. They lie almost parallel to one
>another, and at first glance look like the counter-piece of a two-toed
>footprint. I do not know if more than these two eggs were found.
>Locality? Horizon? Age? Sorry, I don't know, but it wouldn't be difficult
>to find out if someone wants more info.
In Montana, alleged eggs of Troodontids also were laid in a linear row.
So does this tell us anything about brooding behavior in the Tyrannosauridae
and the Troodontidae? Could these theropods be engaged in "drop 'em and
forget 'em" egg-laying? Does this indicate that T. rex chicks were deadly
12-inch terrors right after hatching (requiring no matriarchal or patriarchal
care-taking)? And if Oviraptor chicks required parental care-taking in a
nest, what was unusual about the Tyrannisauridae and Troodontidae chicks
such that they didn't need a nest? Is _anybody_ doing site-taphonomy at
these valuable localities, or are the eggs just being hacked out of the