ISSN 1063-0740, Russian Journal of Marine Biology, 2007, Vol. 33, No. 5, pp. 278–289. © Pleiades Publishing, Ltd., 2007.
Original Russian Text © O.N. Selivanova, G.G. Zhigadlova, G.I. Hansen, 2007, published in Biologiya Morya.
In recent years, new information on the systematics
of living organisms has sharply increased due to the use
of molecular–genetic research tools. This has caused a
number of changes in the taxonomic ranks of algae
(e.g., species, genera, orders, families and classes) and
has made it necessary to establish new taxa and synon-
ymize several previously known ones. Molecular stud-
ies have particularly impacted brown algae in the order
Laminariales and have led to a taxonomic revision of
this order [13, 15, 34, 35, 74, 97, et al.]. Three families
traditionally included in the order have been affected:
the Phyllariaceae, Chordaceae, and Pseudochordaceae.
The Phyllariaceae was transferred from the Laminari-
ales to the order Tilopteridales on the basis of its
genetic similarity to this group . The Chordaceae
was divided into two families with the establishment of
the new family Halosiphonaceae , and a new spe-
cies was added to the Pseudochordaceae.
In the Chordaceae,
Stackhouse 1797: xvi,
the type genus of the famil, was revised by Peters 
on the basis of genetic data. Earlier, one of the two pre-
viously known species in this genus,
bye 1819: 74, was used to establish the new genus
1957: 212], the type genus of the family Halosipho-
naceae, leaving only
1797: xxvi in
Then Kawai et al.  were able
to show genetic heterogeneity in Paciﬁc populations of
in spite of its morphological uniformity.
They suggested that this species included several cryp-
tic taxa and established one new species,
Kawai et Arai 2000: 132 (in ). Sasaki and Kawai
 now have ascertained that true
in the Atlantic Ocean and that 3 other species occur in
the North Paciﬁc,
and 2 new species,
Sasaki et Kawai, 2007: 19 and
Sasaki et Kawai, 2007: 19. All of the
are very similar to one another morphologically but
they differ genetically. The Japanese researchers indi-
is the most widespread species in
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
O. N. Selivanova
, G. G. Zhigadlova
, and G. I. Hansen
Kamchatka Branch of Paciﬁc Institute of Geography FEB RAS, Petropavlovsk-Kamchatskii, 683000 Russia
Oregon State University, Newport, Oregon, USA
Received May 17, 2007.
—An overview of the literature changes in the systematics of algae in the order Laminariales (Phaeo-
phyta) based on molecular phylogentic data is given. In a recent taxonomic revision by Lane et al., , the
number and status of the families traditionally included in the order have been revised. One family was trans-
ferred to the order Tilopteridales; a new family, the Costariaceae, was described; and the genus
split into 2 genera,
and a newly resurrected genus
These innovations have necessitated
a systematic revision of the Far Eastern species of the Laminariales. Our genetic studies indicate that 2 species
and 12 intraspeciﬁc taxa (1 subspecies and 11 forms) from the Russian Paciﬁc coasts should be
transferred to the genus
The following new nomenclatural combinations are proposed:
, comb. nov. (including 4 forms: f.
, comb. nov. (including f.
). In addition, new nomenclature combinations are pro-
posed for intraspeciﬁc taxa of the
L. angustata, L. cichorioides, L. japonica
) that have
already been transferred to the genus
. These include
, comb. nov.,
4 new combinations for the forms of
), and 2 new combinations for the forms of
, and f.
). The taxonomic
status of the rest of the members of the Laminariales known from the seas of the Russian Far East is discussed.
Laminariaceous algae in this area represent 6 of the 8 known families currently included in the Laminariales
(Chordaceae, Pseudochordaceae, Alariaceae, Arthrothamnaceae, Laminariaceae, and Costariaceae).
Laminariales, systematics, molecular phylogeny, new nomenclatural combinations.