Sargassum aquifolium (Turner) C.Agardh

Santiañez, Wilfred John E., Lastimoso, John Michael L., Hoshino, Masakazu, Villafuerte, Brix Nester Q., Kogame, Kazuhiro & Gavino C. Trono, Jr, 2023, Molecular-assisted taxonomic study on the Sargassum C. Agardh (Fucales, Phaeophyceae) in northwestern Luzon, Philippines, Cryptogamie, Algologie 20 (7), pp. 127-142 : 132

publication ID	https://doi.org/ 10.5252/cryptogamie-algologie2023v44a7
DOI	https://doi.org/10.5281/zenodo.10463550
persistent identifier	https://treatment.plazi.org/id/F04E87AD-FFB5-1217-FF09-FBBCFC362529
treatment provided by	Plazi
scientific name	Sargassum aquifolium (Turner) C.Agardh
status

Treatment

Fucus aquifolius Turner , Fuci sive plantarum fucorum generi a botanicis ascriptarum icones descriptiones et historia: 111 ( Turner 1807).

Sargassum kushimotense sensu Trono (1992, 1997 ); Santiañez & Trono (2013), non Sargassum kushimotense Yendo.

TYPE LOCALITY. — Indonesia. Sunda Strait ( Silva et al. 1996).

SPECIMENS EXAMINED. — Philippines. Ilocos Sur, San Esteban, Apatot , 26.IX.2018, leg. W.J.E. Santiañez ( MSI [ MSI29154 ]); La Union, Balaoan, Almeida , 27.IX.2018, leg. W.J.E. Santiañez ( MSI [ MSI29195 ]); La Union, Balaoan, Paraoir , 27.IX.2018, leg. W.J.E. Santiañez ( MSI [ MSI29204 ]).

DISTRIBUTION IN NORTHWESTERN LUZON. — Ilocos Sur, La Union, and Pangasinan ( Fig. 1 View FIG ).

DESCRIPTION

Thallus golden brown when fresh ( Fig. 3A View FIG ), drying dark brown, to 42 cm long, attached to the substrate by a conical to discoid holdfast ( Fig. 3B, C View FIG ). Main axes smooth, slightly compressed, short, to 3 mm long, giving rise to several compressed secondary axes, 2.5 mm wide ( Fig. 3C View FIG ). Blades linear-lanceolate to linear-oblanceolate, narrowed towards blunt or acute apices, mostly less than 36 mm long, 8 mm wide; margins serrate-dentate; stalk short, base asymmetrical; midrib apparent, slightly elevated, fading near the tips; cryptostomata prominent, elevated, scattered but tending to be arranged in rows in narrow blades ( Fig. 3B, D View FIG ). Vesicles large, ovoid to obovoid, 5 mm wide, 7 mm long; tips rounded to pointed, some mucronate; stalks compressed, winged to foliaceous, often as long as vesicles ( Fig. 3D View FIG ). Young receptacles densely clustered, short, compressed to slightly flattened (some somewhat triquetrate, others twisted), often with sharp teeth.