This has been bothering me for a while now, this "hydrid tooth." Mentioned elsewhere as the Euro tooth and claimed to be diagnostic of a feral hog/Russian boar cross.
http://www.thefiringline.com/forums/...d.php?t=319207
So far, the only references that I can find to support the claim that this is indicative of a Russian boar/feral hog mix is the site cited above. The other sites that mention this that I have found all refer to this one site or at least to the same set of images. For example...
http://www.hunting-in-texas.com/learnhogs.htm
http://www.texasboars.com/articles/aging.html
I am sorry. I have seen this before and I have to laugh. That is a vestigial LPM1 (lower first premolar, adult tooth)!!!!
I have yet to see anything in my veterinary or osteology texts that support that crossing feral hogs and Russian boars produces this vestigial tooth, especially when it is a tooth that shows up in domestic hogs!!!!!!
http://www.d91.k12.id.us/skyline/tea...bertsd/pig.htm
http://www.skullsite.co.uk/Pig/pigdom.htm
In fact, that tooth shows up as part of the dental formula for hogs which is
3 1 4 3
______
3 1 4 3
The formula means you have 3 upper incisors, 1 canine, 4 premolars, and 3 molars on each side (left and right) and the same pattern down below on the mandible.
Why is it a vestigial? It is something of a remnant tooth. Many other artiodactyls have all but totally lost the tooth, but it still shows up in regularly in Suidae (pig family). Rarely, you will find a white-tailed deer with one or two vestigial LPM1s as something of a throwback.
Do the vestigial LPM1s always show up in domestic pigs? Nope. They are vestigial. Sometimes they are not there or when they are there they are smaller than their other PM counterparts, less well formed. They are a tooth being evolutionarily lost, but not gone yet by any stretch.
As they are located in the diastema (space or gap) between the canine and the fully formed cheek teeth and are smaller in size, they do tend to get broken off and the gums will heal over the roots such that they may appear to have never been present when they were.
I really have to wonder how it is that folks come up with this stuff and pass it off as being some sort of diagnostic fact.
Go look up pictures of domestic pigs on the internet and teeth like I showed you above and you will see that non-feral domestic pigs have this tooth with remarkable regularity.
Note, there is no real biological stage of being "feral." The authors are treating "feral" as a biological entity that doesn't exist as an entity. So to say that the tooth is diagnostic of a cross between a feral hog and a Russian boar is garbage. Secondly, there is no information other than that one set of pictures on the internet that seems to support the claim. Third, with the tooth showing up in non-feral domestic pigs, it can't be claimed as diagnostic of a feral hog/Russian boar mix to produce a hybrid.