Acaulospora rugosa is a species of fungus in the family Acaulosporaceae. It forms arbuscular mycorrhiza and vesicles in roots. Originally found in West Virginia in soil associated with Andropogon virginicus, the fungus was described as new to science in 1986. References Diversisporales Fungi described in 1986 Fungi of West Virginia 1986 in West Virginia Fungi without expected TNC conservation status