Trisetacus ehmanni Keifer, 1963
the mites live in the sheaths at the base of the needles and also free on the needles. At higher densities this can result in chlorosis, twisting and shortening of the needles, and repeated attacks may lead to twisting of the branches.
Pinus nigra, ponderosa, sylvestris.
see the dscussion under T. pini.