Amblystegium haplocladium Müll. Hal. in Hedwigia 36: 130. 1897 .

Type citation. – “Paraguay, in sylvis prope Guarape truncos arborum habitans: B. Balansa 1878. Coll. No. 3679; L’assomption, in terra humosa, 27. Julio 1897: Balansa Coll. No. 3679 ”.

Type specimens. – Syntypes: Forêt de Guarapi, sur le tronc des arbres 1878, Balansa 3679 (G [1885], G00048141; Herb. Boiss., G00042360; Herb. Boiss., G00048142; Herb. Boiss., G00048143; Herb. DC. [1884], G00048140) .

Type designation. – None found.

Comments. – BESCHERELLE (1885: 19) published this collection number with the name Microthamnium humile Besch.