S1 - 3D model of MSNM V5801

Specimen MSNM V5801 comes from the Sakaraha Formation (Isalo IIIb subunit), which is Bathonian in age (Middle Jurassic). It has been collected in 2001, in association with MSNM V5802 and V5803, near the Tsinjorano village school (Majunga Province, NW Madagascar). It was lying near two theropod teeth and two fragmentary sauropod long bones, almost completely powdered by weathering (G. Pasini, pers. com. 2016). This specimen is attributed to morphotype J2 and included in taxon A, which represents a taxon more derived than Mamenchisauridae but not belonging to Titanosauriformes and Diplodocoidea. This 3D model has been generated with photogrammetry processing and merging 34 photos together; an object with about 180000 faces has been obtained. Description in the main text.