ISSN 10630740, Russian Journal of Marine Biology, 2015, Vol. 41, No. 4, pp. 244–249. © Pleiades Publishing, Ltd., 2015.
The family Sphaerodoridae currently comprises 85
species in 10 genera distributed worldwide . While
the majority of the species inhabit oceanic shelves,
some species occur only at the bathyal and abyssal
depths . Until recently, only 6 species from 3 genera
have been recorded from the Arctic Ocean:
(Webster et Benedict, 1887),
(Johnston, 1845) .
In the last decade, expeditions of the Knipovich
Polar Research Institute of Marine Fisheries and
Oceanography (PINRO) and Zoological Institute,
Russian Academy of Sciences (ZIN RAS) collected
samples which allowed description of three new spe
cies of genus
Lützen, 1961, restr.
The type material of new species is deposited in the
polychaete collection of the Zoological Institute
(ZIN), Russian Academy of Sciences in SaintPeters
MATERIALS AND METHODS
The material for this study was collected during
cruises of the R/V
Jan Mayen, R. Muklevich, F. Nansen,
The text was submitted by the author in English.
I. Kireev, Pr. Chromov
to the Barents Sea,
EastSiberian Sea, Chukchi Sea and Canada Basin in
2003–2005. Sediment samples were collected with a Van
Veen grab (0.1 m
) and a box corer (0.25 m
were removed from the residue and preserved in 6%
boraxbuffered formaldehyde for later analysis.
Figures were made from digital photos by means of
the computer programs Inkscape v. 0.48 and Photo
Family Sphaerodoridae Malmgren, 1867
(Greeff, 1866), by
The following diagnosis for the genus
is based on the published descriptions [2, 4–8],
and includes new results described in this publication.
From five to fourteen stalked
dorsal macrotubercles without terminal papillae.
Anterior end with a short median and two pairs of lat
eral antennae. Setae composite.
Gulf of Mexico, Northwest Atlantic,
North Sea, Arctic Ocean, Japan Sea, Southeast
Three New Species of
(Polychaeta: Sphaerodoridae) from the Arctic Ocean
S. Yu. Gagaev
Zoological Institute, Russian Academy of Sciences, Universitetskaya nab. 1, St. Petersburg, 199034 Russia
Received February 5, 2015
—Three new species of the genus
(Polychaeta) from the Arctic Ocean are
described and illustrated. They differ from other closely related species by having more than 10 longitudinal
rows of stalked macrotubercles on the dorsum.
sp. n. is characterized by twelve rows of macrotu
bercles with stout, short columns which are always at the right angle to the dorsal surface and never overlap.
The body is acornlike with length up to 3.2 mm, the color in ethanol is from yellow to fallow.
sp. n. is characterized by ten to fourteen rows of macrotubercles with thin, long columns, often
lying on the dorsal surface and overlapping. The body is spindlelike, with length up to 6.0 mm. The color in
ethanol is yellow. Eyes are present.
sp. n. is characterized by up to twelve longitu
dinal rows of macrotubercles; the body is almondlike, straight, with length up to 1.4 mm. The color in eth
anol is white. An identification key to the
species from the Arctic Ocean is provided.
sp. n., polychaete, morphology, taxonomy, distribution