Scapanorhynchus?

[readinghiker]

Going through some scapanorhynchus teeth to photograph for a museum bulletin I'm working on, I came across this

tooth.  It is different in that there seems to be at least one striation on the labial face.  The striations on the lingual

face are pretty distinct, but seem to be worn (depositional wear?).  Could the labial striation also be depositional

wear?  But the really odd thing is the pair of cusplets.   Scapanorhynchus raphiodon and Scapanorhynchus puercoensis

are both found within 25 miles of this site, but the cusplets on these species are smaller in relation to the main cusp, and

are more pointed.  In Bourdon's NMMNHS Bulletin 52, there is a photo of S. sp. cf. tenuis (Figure 15, image I bottom left) that shows

a tooth with two accessory cusplets on either side of the main cusp.  However there is not a noticeable gap between the two cusplets

found on either side of the main cusp.  Could this tooth simply be pathological, or might I have missed the species entirely?  

Thanks for your help!