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Laminaria appressirhiza J.E.Petrov & V.B.Vozzhinskaya

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Fucophycidae
Order Laminariales
Family Laminariaceae
Genus Laminaria

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Laminaria appressirhiza J.E.Petrov & V.B.Vozzhinskaya
Holotype from the Sea of Okhotsk and a recently collected specimen from the Shantar Islands. Composite image by Dr. Olga Selivanova (oselivanova@mail.ru), showing type specimen of the species (black and white image, left) and a plant collected from th. Olga Selivanova (oselivanova@mail.ru). © Olga Selivanova (oselivanova@mail.ru).

 

Laminaria appressirhiza J.E.Petrov & V.B.Vozzhinskaya Holotype from the Sea of Okhotsk and a recently collected specimen from the Shantar Islands. Composite image by Dr. Olga Selivanova (oselivanova@mail.ru), showing type specimen of the species (black and white image, left) and a plant collected from th
© Olga Selivanova (oselivanova@mail.ru)

Publication details
Laminaria appressirhiza J.E.Petrov & V.B.Vozzhinskaya 1970: 82, fig. 1

Published in: Petrov, J.E. & Vozzhinskaja, V.B. (1970). [New species of the genus Laminaria from the Sea of Okhotsk]. Novosti Sistematiki Nizshikh Rastenii (Novitates Systematicae Plantarum non Vascularium) 7: 81-87. [in Russian]

Type species
The type species (lectotype) of the genus Laminaria is Laminaria digitata (Hudson) J.V.Lamouroux.

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

Synonym(s)
No synonyms are currently included in AlgaeBase.

Taxonomic notes
This species is similar in morphology to Laminaria digitata (L.) Lamour, but it differs from this and other Laminaria species in having sporangia restricted to one surface of the blade and in having mucilage ducts medially placed and widely spaced in the inner cortex of the blade but absent from the stipe. We anticipate that this species will remain in the genus Laminaria in the taxonomy taxonomic scheme recently proposed by Lane et al. (2006). - (19 Sep 2006) -

Distributional notes
Grows on bedrock and boulders in the subtidal down to -15 m and rarely in the low intertidal. Greatest abundance is at -7 to -10 m. Known from the Sea of Okhotsk on northern and north-eastern coasts and Shantar Islands. - (19 Sep 2006) -

General environment
This is a marine species.

Description
Thalli reach up to 140 cm in height and consist of a rhizoidal holdfast, terete stipe, and a rounded to oval, very highly dissected blade. The blades average 0.5 to 1 meter in length, and freshly collected blades are convoluted with the split sections appearing almost tubular due to inrolling. The stipe is erect, about 10 mm in diameter, and varies in length from 4 cm in intertidal specimens to 15-28 cm in subtidal plants. The holdfast bears rhizoidal haptera that are rigid and grow at nearly right angles to the stipe. They branch repeatedly at intervals of up to 10 mm and gradually narrow toward their tips. The blade or lamina consists of a single layered meristoderm, a cortex, and a medulla. The medulla occupies from 40-60 % of the blade thickness. Mucilage ducts are present in the blade, and they are large (40-56 x 80-100 µm) and widely spaced (250-350 µm apart). The distance ratio of the blade surface to the center of the mucilaginous duct to the medulla varies from 1: 1.1 to 1: 2.5. Mucilage ducts are absent from the stipe and holdfast. Sporangia are formed from August-September and occur only on one surface of the lamina causing an inrolling away from the sorus in the sections of the blade that are fertile. Translated from Russian by O.N. Selivanova.

Habitat
Grows on bedrock and boulders in the subtidal down to -15 m and rarely in the low intertidal. Greatest abundance is at -7 to -10 m.

Type information
Type locality: mare Ochotense, sinus Gizhiginensis, sinus Ucaczi [Gizhiginskaya Bay, Udachi Bay, Sea of Okhotsk, USSR] (Petrov & Vozzhinskaja 1970: 82). Holotype: August 28, 1964; 8 m depth. LE sine numero (Petrov & Vozzhinskaja 1970: 82).

Detailed distribution with sources (Click to Load)

Key references
Klochkova, N.G., Korolyova, T.N. & Kusidi, A.E. (2009). [Atlas of algae-macrophytes Kamchatka waters. Vol 1. Green algae and brown algae]. pp. 1-216. Petropavlovsk-Kamchatsky: KamchatNIRO Press. [in Russian]

Klochkova, T.A., Kim, G.H., Belij, M.N. & Klochkova, N.G. (2012). Morphology and phytogeography of Laminaria appressirhiza and L. inclinatorhiza (Phaeophyceae) from the Sea of Okhotsk. Algae. An International Journal of Algal Research 27: 139-153.

Kloczcova, N.G. (1996). Flora vodoroslei makrofitov Tatarskogo Proliva i osobennosti ee formirovanija [Macrophyte algal flora of Tatars Gulf (Sea of Japan) and peculiarities of its formation]. pp. 1-289. Vladivostock: Dalnauka. [in Russian]

Selivanova, O.N., Zhigadlova, G.G. & Hansen, G.I. (2007). Revision of the systematics of algae in the order Laminariales (Phaeophyta) from the Far-Eastern Seas of Russia on the basis of molecular-phylogenetic data. Russian Journal of Marine Biology 33: 278-289.

Created: 19 September 2006 by M.D. Guiry

Verified by: 14 December 2017 by M.D. Guiry

Accesses: This record has been accessed by users 3942 times since it was created.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Klochkova, T.A., Kim, G.H., Belij, M.N. & Klochkova, N.G. (2012). Morphology and phytogeography of Laminaria appressirhiza and L. inclinatorhiza (Phaeophyceae) from the Sea of Okhotsk. Algae. An International Journal of Algal Research 27: 139-153.

Linking to this page: http://www.algaebase.org/search/species/detail/?species_id=131433

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 12 December 2018.

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