 "A. polypyramis" fruit bodies have also been noted to be similar to "A. abrupta"; however, it tends to have larger caps, up to in diameter, a fragile ring that soon withers away, and somewhat larger spores that typically measure 9–14 by 5–10 µm.The amyloidity and size of the spores are reliable characteristics to help distinguish "A. abrupta" specimens with less prominently bulbous bases from other lookalike species.Mycologists Tsuguo Hongo and Rokuya Imazeki suggested in the 1980s that the Japanese mushroom "A. sphaerobulbosa" was synonymous with the North American "A. abrupta".