| Name | Petrosiphon M. Howe |
| Authorship | M. Howe |
| Rank | Genus |
| NomenclaturalStatus | Unknown |
| Placed in | Valoniaceae Kützing |
| Contains | Petrosiphon adhaerens M. Howe Petrosiphon sp. |
| Remarks | Created from Taxon Name Import: Petrosiphon M. Howe |
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