| Name | Acaulon Müller Halle |
| Authorship | Müller Halle |
| Rank | Genus |
| NomenclaturalStatus | NomLeg |
| Placed in | Pottiaceae |
| Contains | Acaulon muticum (Schreber ex Hedwig) Müller Halle Acaulon rufescens A. Jaeger Acaulon schimperianum Sullivant Acaulon sp. Acaulon triquetrum (Spruce) Müller Halle |
| Remarks | Lectotype: A. muticum (Hedwig) Müller Halle (Phascum muticum Hedwig) (vide Pfeiffer, Nomencl. Bot. 1: 15. 8 Dec 1871). |
| Citation | 12 Feb 1847 Bot. Zeitung (Berlin) 5: 99 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Acaulon Müller Halle |
| Identification made in | 2009 (1) |