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> > > if you say "monotreme"/"monotrema", I know you're talking about a
> > > mammal that lays eggs rather than having live birth.
But not the other way around. The monotremes have _retained_ the condition
of laying eggs. We can be fairly sure that lots of Mesozoic mammals
(especially mammals in the wider senses) also laid eggs, "even though" they
were not monotremes.
very well....so the next time a kid asks me "what's a word for egg-laying
mammals?" (and yes, I have been asked this before)....what do I tell him?
do I say "synapsids"?
> Is it "parochial" because its human?
No, it's parochial because all egg-laying mammals that aren't monotremes
happen to have died out. Overlooking the important point that there were
other egg-laying mammals is parochial.
> I'll just say that if they're not monotremes, fine, then we don't call
> them monotremes...
Bingo. Monotremes are monotremes -- other egg-laying mammals were not
in paleontology, yes.
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