Re: Re:Re: Baculum and Anal fins

Are you sure that there is no "penis bone" associated with
nonmammalian species? I know that the baculum is found in many
mammalian species, but this is the first time that I heard that it
doesn't exist in nonmammalian species. Maybe it is called something
else. Or maybe I am in error.
My knowledge of anatomy is limited. I am not an anatomist, but I
present talks to a private club. I trying to put together a talk on
homologies and analogies between fish and mammal bodies. Specifically,
between the skeletons of sting rays and human beings!

A Google search also shows that the T. rex "bone" is not a baculum, but
a difference in the bone tissue of the female related to calcium
metabolism during egg shell formation.
That difference in bone tissue was recently discovered. However,
the researcher knew before making that claim that the skeleton being
looked at was female. If the skeleton turns out to be male, the theory
may have to be reconsidered. There is a difference in sizes said to
exist between male and female T. rexes. Apparently, some means of
distinguishing T. rex gender has been available for some time, other
than a "difference in bone tissue."
I had read years before that that there is another "penis bone"
structure that supposedly distinguishes between T. rex genders. I read
an article that didn't have a picture of the feature in question. While
looking a the skeleton of a purportedly male T. rex in a museum, I
convinced myself that a large bone located in the exact right place was
the penis bone. It sure looked impressive |:-)


.

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