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Sargassum pacificum Bory 1828

Publication details
Sargassum pacificum Bory 1828: 123

Published in: Bory de St. Vincent, J.B. (1828). Botanique, Cryptogamie. In: Voyage autour du monde, exécuté par ordre du Roi, sur la corvette de Sa Majesté, la Coquille, pendant les années 1822, 1823, 1824 et 1825. (Duperrey, L.I. Eds), pp. 97-200. Paris: Bertrand.
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Type species
The type species (holotype) of the genus Sargassum is Sargassum bacciferum (Turner) C.Agardh.

Status of name
This name is of an entity that is currently accepted taxonomically.

Infrageneric classification
Subgenus Sargassum Section Sargassum

Origin of species name
Adjective A (Latin), pertaining to the Pacific Ocean.

Homotypic Synonym(s)
Sargassum biserrula f. pacificum (Bory) Grunow 1915

Heterotypic Synonym(s)
Sargassum tahitense (Grunow) Grunow 1874
Sargassum cheirifolium var. tahitense Grunow 1874
Sargassum vulgare var. mangarevense Grunow 1916
Sargassum vulgare var. sociale Grunow 1916
Sargassum obtusifolium var. boraborense Grunow 1916
Sargassum bacciferum var. latiuscula Grunow 1916
Sargassum mangarevense (Grunow) Setchell 1926
Sargassum sociale (Grunow) Setchell 1926
Sargassum boraborense (Grunow) Setchell 1926

Taxonomic notes
Section Sargassum [= Sect. Malocarpicae] (Matteo & Payri 2009). Sect. Sargassum (Cho et al. 2012). - (20 Feb 2013) - Wendy Guiry

General environment
This is a marine species.

Thallus overall shape ovate; holdfast coalescent and flat; main axes cylindrical and warty; secondary axes cylindrical and smooth; leaves of the lower part of the thallus olive green, oval or oblong to lanceolate (rarely linear), pedicels short, margins undulate or serrate, apex obtuse, rounded or acute, midrib percurrent, cryptostomata thin and few, randomly arranged on the surface of the leaf; leaves of the upper part of the thallus cashew brown, sessile, simple, margin undulate or serrulate to finely dentate, apex acute or rounded, rarely bifid, midrib percurrent, cryptostomata thin and randomly arranged on the surface of the leaf, sometimes in one row on each side of the midrib; vesicles spherical or oval, smooth or with a thin spine-like or leaf-like mucro, pedicels terete, thin or leaf like with smooth or serrate margins, of the same size or longer than vesicles; receptacles bisexual (distinct male and female conceptacles in a same receptacle), branched, cylindrical, lanceolate, smooth or with some rare, minute teeth-like protuberances; receptacles can be mixed with small leaves or vesicles.

In French Polynesia, this species occur in the Society Archipelago where it grows in shallow waters to 1 m deep in lagoon, in sheltered areas of fringing reef, on coral heads of the barrier reef, or as dense belts on the rim margin in exposed areas of the reef flat (Matteo et al. 2008: 1550).

Type information
Syntype localities: Chile; Port Praslin, New Ireland; Tahiti (Bory de St. Vincent 1828: 123). Lectotype: Dumont d'Urville; PC AB14917 (Howe 1914: 66). Notes: Lectotype from Conception, Chile; Lectotypified by Howe 1914: 66 (Matteo et al. 2008: 1550).

Detailed distribution with sources
(as Sargassum pacificum Bory)
North America: Baja California (Phillips 1995), Gulf of California (Norris, Aguilar-Rosas & Pedroche 2017), Mexico (Pedroche & Sentíes 2020).

Central America: Mexico (Pacific) (Pedroche & al. 2008).

South America: Chile (Howe 1914 , Ramírez & Santelices 1991), Galápagos Islands (Taylor 1945, Ruiz & Ziemmeck 2011), Peru (Dawson, Acleto & Foldvik 1964, Ramírez & Santelices 1991, Phillips 1995, Avila-Peltroche & Padilla-Vallejos 2020), Temperate South America (Ramírez & Santelices 1991).

South-east Asia: Indonesia (Silva, Basson & Moe 1996).

Australia and New Zealand: Rangitahua/Kermadec Islands (Duffy & Ahyong 2015).

Pacific Islands: Central Polynesia (Tsuda & Walsh 2013), French Polynesia (Mattio, Payri & Stiger-Pouvreau 2008).

(as Sargassum tahitense (Grunow) Grunow)
Australia and New Zealand: New Zealand (Harper & al. 2012), Rangitahua/Kermadec Islands (Adams 1994).

Pacific Islands: French Polynesia (Phillips 1995, Pari & N'Yeurt 1999).

(as Sargassum biserrula f. pacificum (Bory) Grunow)
Pacific Islands: French Polynesia (Pari & N'Yeurt 1999).

(as Sargassum mangarevense (Grunow) Setchell)
Australia and New Zealand: Queensland (Lewis 1985, Phillips 2002, Bostock & Holland 2010).

Pacific Islands: French Polynesia (Phillips 1995, Pari & N'Yeurt 1999, N'Yeurt & Payri 2006), Tahiti (Stiger et al. 2000, Yoshida, Stiger, Ajisaka & Noro 2002, Stiger et al. 2004, Rosado-Espinosa et al. 2020 ).

(as Sargassum sociale (Grunow) Setchell)
Pacific Islands: Cook Islands (Stiger et al. 2004), French Polynesia (Phillips 1995, Pari & N'Yeurt 1999, N'Yeurt & Payri 2006), Tahiti (Stiger et al. 2000, Yoshida, Stiger, Ajisaka & Noro 2002, Stiger et al. 2004).

(as Sargassum boraborense (Grunow) Setchell)
Pacific Islands: French Polynesia (Phillips 1995, Pari & N'Yeurt 1999).

Key references
Cho, S.M., Lee, S.M., Ko, Y.D., Mattio, L. & Boo, S.M. (2012). Molecular systematic reassessment of Sargassum (Fucales, Phaeophyceae) in Korea using four gene regions. Botanica Marina 55(5): 473-484.

Dawson, E.Y., Acleto, O.C. & Foldvik, N. (1964). The seaweeds of Peru. Beihefte zur Nova Hedwigia 13: 1-111, 81 pls.

De Toni, G.B. (1895). Sylloge algarum omnium hucusque cognitarum. Vol. III. Fucoideae. Vol. 3 pp. [i]-xvi, [1]-638. Patavii [Padua]: Sumptibus auctoris.

Dixon, R.R.M., Matteo, L., Huisman, J.M., Payri, C.E., Bolton, J.J. & Gurgel, F.D. (2014). North meets south - Taxonomic and biogeographic implications of a phylogenetic assessment of Sargassum subgenera Arthrophycus and Bactrophycus (Fucales, Phaeophyceae). Phycologia 53(1): 15-22.

Howe, M.A. (1914). The marine algae of Peru. Memoirs of the Torrey Botanical Club 15: 1-185, 44 figs, 66 plates.

Mattio, L., Payri, C.E. & Stiger-Pouvreau, V. (2008). Taxonomic revision of Sargassum (Fucales, Phaeophceae) from French Polynesia based on morphological and molecular analyses. Journal of Phycology 44: 1541-1555.

Mattio, L., Payri, C.E. & Stiger-Pouvreau, V. (2008). Taxonomic revision of Sargassum (Fucales, Phaeophceae) from French Polynesia based on morphological and molecular analyses. Journal of Phycology 44: 1541-1555.

Mattio, L., Payri, C.E., Verlaque, M. & De Reviers, B. (2010). Taxonomic revision of Sargassum sect. Acanthocarpicae (Fucales, Phaeophyceae). Taxon 59(3): 896-904.

Pedroche, P.F., Silva, P.C., Aguilar Rosas, L.E., Dreckmann, K.M. & Aguilar Rosas, R. (2008). Catálogo de las algas benthónicas del Pacífico de México II. Phaeophycota. pp. [i-viii], i-vi, 15-146. Mexicali & Berkeley: Universidad Autónoma Metropolitana; Universidad Autónoma de Baja California; University of California Berkeley.

Phillips, N. (1995). Biogeography of Sargassum (Phaeophyta) in the Pacific basin. In: Taxonomy of Economic Seaweeds. (Abbott, I.A. Eds) Vol. 5, pp. 107-145. La Jolla, California: California Sea Grant College System.

Created: 29 October 1999 by M.D. Guiry

Verified by: 04 December 2017 by M.D. Guiry

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2020. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 28 September 2020.

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