It has been assigned to Lamellipedia,[1] although it was also compared to Emeraldella, another Cambrian arthropod, and was suggested to be an artiopod.

[2] Siriocaris is roughly 11 cm (4.3 in) long at largest, with a sub-elliptical shape to its body.

The head shield is parabolic in shape, weakly trilobate, and roughly a fifth of the body length.

The basipod has two rows of spines along the middle, with a leaf-shaped exopod of similar length to the endopod.

[1] Siriocaris derives from caris “shrimp”, a common suffix for prehistoric arthropods, and the Sirius Passet where it is found.