Dictyopteris pacifica (Yendo) Hwang, Kim & Lee, 2004

Belleza, Dominic Franco C., Tateishi, Hiroto, Tanimae, Shin-Ichiro, Kobayashi, Taishun, Aota, Tomoyuki, Urasawa, Toshiki & Nishihara, Gregory N., 2025, An annotated list of brown seaweeds (Phaeophyceae) from Nakadori Island (northern Goto Islands, Nagasaki, Japan), Phytotaxa 694 (1), pp. 1-24 : 7-8

* Dictyopteris pacifica (Yendo) Hwang, Kim & Lee, 2004

Japanese name: コモングサ (komongusa)

Basionym: Spatoglossum pacificum Yendo, 1920

Type locality: —Mera, Chiba Prefecture, Japan

Description and remarks: —Thalli are upright, reaching up to 10–28 cm tall. The entire plant is attached to the substrate by its rhizomatous holdfasts. Arising from the holdfast is a thickened stipe, 3–5 mm in diameter and 1–2 cm in height. The distal parts of the stipe becomes the midrib where the blades arise. The midrib is only found in the lower parts of the plant. The blades are dichotomously branched, 2–5 mm in width and have smooth margins but sometimes have dentate margins near the apices. This species was only found in Aokata and was common during the early summer months.

Unlike other Dictyopteris spp. , the midrib of this species is found only on the lower parts of the plant. This anatomical characteristic of the thallus, along with other evidence from molecular analyses prompted the synonymization of Spatoglossum pacificum to its current nomenclature ( Hwang et al., 2004a).

Materials examined: —18ECS1-159 (1 to 5)