T. ambigua, Phycodrys ambigua, P. bullata, Pseudophycodrys rainosukei; misidentified as Delesseria kurilensis, Tokidadendron kurilensis

Description: Thallus is dark red to dusky pink, somewhat crisp, usually 12 cm (5 in) or less in height and up to 5 cm (2 in), wide with smooth, undulating margins, cartilaginous midrib, and opposite veins. Cystocarps develop directly on midrib and veins whereas tetrasporangia develop over the blade. Blades disintegrate after reproduction in spring, leaving only the perennial midrib until new blades proliferate from it the following spring. Habitat: This species is found on rock in the low intertidal to shallow subtidal of semi-protected to semi-exposed habitats. Similar taxa: Congregatocarpus kurilensis