Thoracocare is a minute to very small (1.7 – 3.6 mm long) trilobite, that lived during part of the Middle Cambrian in what are today the states of Idaho, Nevada and Utah.

It can be distinguished from Agnostida by the very wide subquadrate glabella (about half the cephalon), parallel-side or widening forward in the largest specimen, with the full front side touching the border.

Thoracocare minuta occurs in the same deposit as Pagetia rugosa, Pentagnostus bonnerensis, Elrathina spencei, Oryctocare sp., Oryctocephalus walcotti, and Ogygopsis typicalis.

The central raised area of the cephalon (or glabella) is broad, subrectangular, tapering slightly to the back in larger specimens and touching the frontal border, and without transverse furrows.

In Thoracocare minuta the glabella is more than ⅓ of the width of the cephalon, is parallel sided or expands forward and reaches the frontal border.