And now for the steamy
consequence of so much display, pushing and shoving... a big female has selected
this raunchy male to mate and they do it noisily startling a flock of
indeterminate South American pterosaurs. I have depicted hypothetical dimorphism
in Carnotaurus. the female slightly bigger and more powerful, with blunt horns.
The male slightly smaller but with sharp, more damaging and imposing horns.
Nobody knows how dinosaurs had sex. But males probably had similar penises to
crocodiles as hypothesized by the sexual dimorphism in Tyrannosaurus rex, where
gracile specimens with an extra tail chevron seem to indicate that these were
males (the extra chevron serving to attach the penis muscles, just as in
crocodiles). If this is correct, then by the fossil skeletons it must be assumed
that females of T. rex were invariably bigger than the males.
Sex for the big sized dinosaurs must have been a rather strenuous task!
