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Spinosaur teeth from Spain
A new online paper:
Antonio Alonso & José Ignacio Canudo
On the spinosaurid theropod teeth from the early Barremian (Early
Cretaceous) Blesa Formation (Spain).
Historical Biology (advance online publication)
Spinosaurids are one of the most abundant theropods from the Early
Cretaceous of the Iberian Peninsula. The published fossil record
consists mainly of teeth. A good example is La Cantalera-1 site in the
Blesa Formation (Spain). This site represents a marshy environment
with periodic droughts, resulting in a non-permanent body of water.
Theropod dinosaur teeth are frequent. Seventeen spinosaurid teeth have
been studied using qualitative and quantitative features, including a
statistical analysis, in order to compare them with the known
spinosaurid record from Spain. In La Cantalera-1 we recognise two
different morphotypes: Baryonychinae indet. and Spinosaurinae? indet.
Baryonychinae indet. was produced by baryonychines close to Baryonyx;
teeth with similar morphology have been described in other sites from
the Early Cretaceous of the Iberian Peninsula. Teeth tentatively
attributed to Spinosaurinae? indet. were produced by spinosaurines
close to Spinosaurus. This morphotype could provide new evidence of
the presence of spinosaurines in the Early Cretaceous of the Iberian
Peninsula. The small size of the teeth from La Cantalera-1 when
compared with those from other sites is interpreted as the result of
the conditions characteristic of the deposit area, which represents an
ecosystem unable to sustain large-sized organisms.