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New information on the abelisaurid pedal elements from the Late Cretaceous of NW Madagascar (Mahajanga Basin)
An abelisaurid ungual phalanx of pedal digit III from the Late Cretaceous of NW Madagascar is here figured and described for the first time. Other materials include pedal phalanges whose figures and description increase the knowledge on the pes variability of the Malagasy Abelisauridae (e.g., ungual I and phalanx III-1 proportions and structures), support the identification of the pedal elements (e.g., phalanx III-2) recently proposed by Carrano (2007), and render questionable the attribution of some isolated elements to the species Majungasaurus crenatissimus.
Abelisaurid pedal phalanges III-1 (A-L) and reconstructed abelisaurid digit III of the left pes in craniodorsal view (M). MSNM V5255: A) dorsal view; B) ventral view; C-D) lateral views; E) proximal view; F) distal view. MSNM V5510: G) dorsal view; H) ventral view; I) proximal view; J) distal view; K-L) lateral views. Scale bars equal 30 mm. In M) the pedal elements in silhouette are from Carrano (2007: fig. 11), and the phalanges of the digit III are based on specimens MSNM V5255 (III-1), MSNM V5256 (III-2), and MSNM V6418 (III-4), scaled up to correspond with the size of the elements represented in Carrano’s reconstruction.