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I came across this paper in Fruitbat's library and it raised some questions so decided to see what others think. The paper studied Spinosaurid teeth that were found on the Iberian peninsula La Cantalera site and concluded that two morphotypes of spinosaurid teeth were recognized in the early Barremian of that site: both a Baryonychinae indet. and Spinosaurinae? indet. They ruled out attribution to other theropods or crocodylomorphs, although they remained cautious due to the scarce fossil record known. It also concluded that Spinosaurinae? indet. did not fit exactly with any of the described spinosaurine teeth, and regarded them as belonging to an unknown spinosaurine spinosaurid, probably closer to Spinosaurus than any other member of Spinosaurinae. So let's move forward in time to the Kem Kem. Ute Richter 2012 research described 3 morph types in the Kem Kem distinguished from each other by ornamentation and concluded that more than one species may be present.. Teeth from this region are typically straight but thin curved ones do show up like the one posted by indominus rex (see pic below) and some are attributed to croc's. So what if we had another morph type in this region a thin more curved tooth more like Suchomimus which is a Baryonychinae. The Spanish teeth suggest that these two families might coexist in the same fauna. I believe there are multiple species in the Kem Kem, Sigilmassasaurus for sure and Spinosaurus sp. but are there additional ones more aligned with Baryonchinae? Food for thought.... The Spanish teeth are described quite well: The mesial margin of the teeth is convex, while the distal margin is concave or straight. The cross-section varies between elliptical and subcircular. All teeth have mesial and distal carinae, but some teeth do not have serration on the mesial carina. Carinae are located on the mesiodistal axis of the crown and start close to the cervix. Denticles are chisel-shaped and their height and width vary between 0.1 and 0.12mm. Denticle density per mm ranges from 6 to 12. The denticle size density index values are close to one, so there is no difference between the mesial and the distal size of the denticles. The denticles are perpendicular to the margin of the teeth. Both faces of the teeth bear enamel ornamentation which consists of 6–7 ridges (on average) orientated apicobasally; the ridges do not reach the apex. https://www.researchgate.net/profile/Antonio_Alonso7/publication/276158392_On_the_spinosaurid_theropod_teeth_from_the_early_Barremian_Early_Cretaceous_Blesa_Formation_Spain/links/556c19a708aefcb861d619c9.pdf?origin=publication_detail