Basionym Name:Stemonitis confluens var. syncarpa Yamash., [as 'syncarpon'] J. Sci. Hiroshima Univ., B, 2 3: 34 (1936)
Homotypic synonyms:Stemonitis syncarpa (Yamash.) Emoto, Myxomyc. Japan (Tokyo): 112 (1977)Symphytocarpus syncarpus (Yamash.) Y. Yamam., J. Jap. Bot. 59(8): 256 (1984)