Decuriasuchus is known from ten specimens, including nine articulated and associated skeletons, three of which have nearly complete skulls. The holotype MCN PV10105a consists of an articulated partial skeleton, lacking scapular girdle and limbs. Eight specimens associated with the holotype, MCN PV10105b-i, and the tenth specimen (MCN PV10004), consists of cranial remains from a different spot in the same locality. The specimens were found in the Alemoa Member of the Santa Maria Formation, Rosário do Sul Group. The discovery locality is Rio Grande do Sul, Brazil.[1]