| Name | Cosmarium arnellii Boldt |
| Authorship | Boldt |
| Rank | Species |
| NomenclaturalStatus | Unknown |
| Placed in | Cosmarium |
| Contains | Cosmarium arnellii f. compressum West Cosmarium arnellii var. notatum R.Grönblad Cosmarium arnellii f. subrotundatum West |
| Remarks | Created from Taxon Name Import: Cosmarium arnellii Boldt |