Which organism was most likely to live at the same time as brachiopods?

Trilobites is the organism that was most likely to live at the same time as brachiopods. Brachiopods are the animals that had hard shells on both the upper and lower surfaces. It falls under the phylum Brachiopoda. The life span of these animals lasts from three to thirty years. I hope the answer helps you.

The figure is not necessarily a parallelogram because only one diagonal is bisected and only one pair of sides is congruent.