Not an accepted name (status: unknown). No accepted name is recorded for it yet.

Calliergon giganteum f. crassicostatum (Mikut.) Karczm. 4% complete

No common name

Ann. Univ. Mariae Curie-Skłodowska, Sect. 3, Biol., 20: 36, 36, 1965

There is no corrections for Calliergon giganteum f. crassicostatum yet.