| Name | Mastocarpus Kützing |
| Authorship | Kützing |
| Rank | Genus |
| Placed in | Phyllophoraceae |
| Contains | Mastocarpus sp. Mastocarpus stellatus (Stackhouse) Guiry |
| Remarks | Designated Type: M. mammillosus (Goodenough & Woodward) Kützing (Fucus mammillosus Goodenough & Woodward) (vide Setchell & N. L. Gardner, Univ. Calif. Publ. Bot. 17: 258. 1933) |
| Citation | [14-16 Sep 1843] Phycol. General. 398 |