My dad picked up this fossil from a quarry in Brazil, and based on what I've been able to find so far it seems like it's a tharrhias araripis (the location and appearance matches the info I've found so far). It seems pretty detailed/well preserved, and I'm wondering if anyone can confirm my guess or identify it as something else. Thanks!
Had some trouble uploading my pictures, so check them out here: http://imgur.com/a/MtkhD