| Name | Calicium pusillum (Acharius) Röhling | 
| Authorship | (Acharius) Röhling | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Calicium Persoon | 
| Citation | 1813 Deutschl. Fl. (Roehling), ed. 2, Kryptog. Gew. 2: 50 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calicium pusillum (Acharius) Röhling | 
| Identification made in | [no date] (1) |