Hypnum circinicaule Müll. Hal. in Rev. Bryol. 14: 57. 1887 [nom. nud.].

= Sematophyllum circinicaule (Müll. Hal.) Broth. in Engl., Nat. Pflanzenfam. ed. 2, 11: 433. 1925.

Type citation. – “Sin. loc., Balansa 3692 ”.

Original specimen. – 3692. Hypnum circinicaulis C. Müller n. sp. Peribebuy (Paraguay) Balansa (Herb. Barb.-Boiss. [non-original Balansa label], G00048085) .

Comments. – A specimen numbered 3692 from the locality “Bords du Mbaï” was named “ Rhaphidostegium circinale (Hpe) ” by BESCHERELLE (1885: 19) and later served as the type of Aptychus circinicaulis Müll. Hal. (Ξ Sematophyllum circinicaule (Müll. Hal.) Broth.), see under that name. Since the above specimen does not have an original Balansa label, and is assumed to be possibly erroneous, this specimen is not included in Appendix 1.