Last week I gave you this mystery bone to identify:
As I suspected, it was simultaneously easy and difficult: easy because it’s clearly an os penis or baculum; difficult because it can be hard to narrow down the species to which a baculum belongs without having specimens for comparison. For some reason people can be funny about penis bones and, despite the fact that male animals tend to be over-represented in museums, the baculum will often have been removed or not included in skeletal mounts.
That said, Steph came closest, getting the right family with the clue:
Bac to the bear-minimum I would guess?
If you remember one of my past posts I showed an image of the baculum mounted on the skeleton of a Giant Panda in Berlin (more about this below):
You can see that, although it differs slightly with a bit of a dip towards the tip, it’s rather similar in structure to the mystery object.
Oddly however, it appears that this baculum on the Berlin Panda specimen has been switched for that of a different bear species. Pandas have a very distinctive reduced baculum with wings (see below), that looks nothing like this, which is more similar to the os penis of a Spectacled Bear (or possibly a Polar Bear at a push).
The mystery object is actually the baculum of a Sloth Bear Melursus ursinus (Shaw, 1791).
N.B. note that the writer of this label couldn’t quite bring themselves to write the full word “penis”
In future, should you ever find yourself with an unidentified bear penis on your hands, I suggest taking a look at this handy figure by Abella et al. 2013¹:
Baculum in laterial view of: A Helarctos malayanus; B Ursus thibetanus; C Tremarctos ornatus; D Ursus americanus; E Melursus ursinus; F Ursus arctos; G Ursus maritimus; H Indarctos arctoides; I Ventral view of the Baculum of Ailuropoda melanoleuca; J Dorsal view of the baculum of Ailuropoda melanoleuca.
So in answering one mystery object we’ve uncovered a far bigger mystery – how did the Berlin Panda end up with the wrong penis?
Zygoma 
So the Berlin Panda might have a Polar Bear baculum attached?
Yep, although I think it’s more likely to be Spectacled Bear.
now that’s a different kind of chimera isn’t it?
speaking of hesitant to write that word of male anatomy… in 3rd grade i was punished for highlighting it in an article about king tut and his mummified member. no shame (or no sense) for an 8 yr old.
hat’s off again paolo
Oh, oh, I can’t bear it.
How funny we humans are about baring such, er, things.
Always useful to have around the house. Just in case you need to prep o ne: http://primitivesurvivors.com/diy-taxidermy-bear-baculum/