Fortuynia rotunda Marshall & Pugh, 2002

Records associated with mangroves: Barra reef near Inhambane, Mozambique, pneumatophores and stems of Avicennia mangroves (Marshall & Pugh 2002) . Okukubi River, Kin Town, Okinawa Island, Japan, algae from mangrove forest floor (Karasawa & Hijii 2004).

Distribution: Mozambique, Japan.

Remarks: Fortuynia rotunda is the only species of this genus that inhabits exclusively mangrove habitats.