| Name | Calyptothecium squarrosulum Noguchi & B. C. Tan |
| Authorship | Noguchi & B. C. Tan |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Calyptothecium |
| Citation | 1984 J. Hattori Bot. Lab. 57: 64 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calyptothecium squarrosulum Noguchi & B. C. Tan |
| Identification made in | [no date] (1) |