Table 2 Anatomical evidence supporting the alternative (Silesauridae vs Ornithischia) affinities of Pisanosaurus mertii.

Well-developed laminae in trunk vertebrae^†

Reduced external mandibular fenestra*

Trunk vertebrae with tall neural arches^†

External mandibular fossa (h)

Propubic pelvis^†

Medially expanded mandibular symphysis*

Cnemial crest unexpanded proximally^∆

Torsion of the anterior portion of dentary^∆

Not lateromedially expanded distal tibia^†∆

No dentary replacement foramina (h)*

Unexpanded outer malleolus^†∆

Strongly concave dorsal margin of the dentary (h)

Unconstricted distal end of the fibula^†

Buccal emargination^∆

Lateromedially wide aap^†

Labiolingualy broad tooth crowns (h)

Large fibular facet on the calcaneum^†

Medially inclined maxillary tooth crowns (h)

Compressed proximal portion of metatarsal IV^†

Tooth crowns with primary ridge

Anteroposteriorly short cervical vertebrae

More than three sacral vertebrae

Broad and deep posterior notch on proximal tibia

Lateromedially narrow astragalus

Proximodistally deep aap^†

Lateromedially compressed calcaneum