Burmesarchaea grimaldii is only known from a single male specimen preserved in amber. It is a small spider, with a body length of just under . Characteristic of the family Archaeidae, the head region is raised up from the thorax, although without the distinctive "neck" found in other genera in the family. It is presumed to have eight eyes (the posterior median eye is not visible); the anterior median eye is the largest. The
chelicerae are long relative to the body at about , and project forward at about 45 degrees. The longest leg, the first, is long; the shortest, the third, is long. All the legs are without spines. The
pedipalp has a large, rounded
bulb with a spoon-shaped embolus and bent tegular apophysis. ==Taxonomy==