Sadly no, they didn't meet; Hyneria is Devonian, Rhizodus is from quite a narrow range in the middle part of the Carboniferous/top of the Mississippian (My PhD thesis was on Rhizodus). Nice sketch, though!
JWArtworkHobbyist Digital Artist
When accidentally meeting and ending up seeing each other as a prey item I wonder weather Hyneria or Rhizodus would have won (don't know if that was possible). I think I'd go for Rhizodus in that case...