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Re: Venom in Sinornithosaurus
> It is especially suspicious that only the longest, sharpest, and
> most "fang-like" teeth have grooves.
Of course, long knives have grooves, but they aren't for venom
delivery (or the other misconception, that they work the other way
around, to let blood come out while the knife is still in). This may
simply be a weight saving feature, as with human designed knives
(although often the grooves aren't to impart I-beam like
strength/weight ratios, but rather they do it just for aesthetic
appeal) The entire skull does look rather lightly built. The longest
teeth would need the most strength to keep from breaking, so a groove
on the longest teeth makes sense if you only wanted to reduce weight.
And indeed, the longest, sharpest, and most fang-like teeth are the ones
that have grooves in baboons.
I agree, if the platypus/monotremes had gone extinct, we'd have no
examples of venomous mammals (as far as I know)
There are several soricids, and *Solenodon*, which have a venomous bite.
We don't need to prove no Theropods had venom, we only need to show
the claim that *this particular theropod* had venom is not adequately
That still leaves it open for other dinosaurs to be found with Venom