Macrocoma orthotrichoides (Raddi) Wijk & Margad., Taxon 11: 221. 1962. Lasia orthotrichoides Raddi, Critt. Bras. 6. 1822. Orthotrichum filiforme Hook. & Grev., Edinburgh J. Sci. 1: 116. 4. 1824. Type: Brazil. Raddi (FI, lectotype; isolectotypes BM, E).
Macromitrium filiforme Schwägr., Sp. Musc. Frond. Suppl. 2, 2(1): 64. 171. 1826. Macrocoma filiforme (Hook. &Grev.) Grout, Bryologist 47: 5. 1944, hom. illeg. Based on collection from Brazil.