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The spinorial degrees of freedom of two spacelike separated Dirac particlesare considered and a collection of nine locally Lorentz covariant bitensors isconstructed. Four of these bitensors have been previously described in [Phys.Rev. A 105, 032402 (2022), arXiv:2103.07784]. The collection of bitensors hasthe property that all nine bitensors are simultaneously zero if and only if thestate of the two particles is a product state. Thus this collection ofbitensors indicates any type of spinor entanglement between two spacelikeseparated Dirac particles.

Nine Lorentz covariant bitensors for two Dirac spinors to indicate all entangled states