That is not somthing anyone looks forward to idc how many plates they have in their head lol. It seems to me ive seen more nasty Retic bites than Burm bites. I dont know for a fact but i think a adult retc has longer/larger teeth. The difference is Burms have 4 rows on top.. kinda like razor wire.. you cant tell without a proper scale size comparison but here is the Burm skull as Kev posted the Retic.
Retic below
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