subparietal

sub·pa·ri·e·tal

(sŭb'pă-rī'ĕ-tăl),
Below or beneath any structure called parietal: bone, lobe, layer of a serous membrane, etc.

subparietal

(sŭb″pă-rī′ĕ-tăl) [″ + paries, a wall]
Below the parietal bone or lobe.