| Stylochus zanzibaricus Laidlaw, 1903 | 1903 or earlier | | | |
| Planocera crosslandi Laidlaw, 1903 | 1901-1902 | 18 m | | "White, leaf-like form. Dredged off the mainland coast in 10 fathoms. 1 specimen. |
| Paraplanocera aurora Laidlaw, 1903 | 1901-1902 | | | |
| Disparoplana dubia Laidlaw, 1903 | 1901-1902 | | | |
| Stylochus suesensis Ehrenberg, 1831 | 1901-1902 | | | |
| Phylloplana lactea Laidlaw, 1903 | Feb 19, 1901 | | | |
| Gyratrix hermaphroditus Ehrenberg, 1831 | Aug 1995 | Intertidal | algae | beach between the Institute of Marine Sciences and the Floating Restaurant, Ulva-like algae with sand, from rocks beside a stair from the beach to the dike, lower eulittoral at low tide |