1063-0740/03/2905- $25.00 © 2003
Russian Journal of Marine Biology, Vol. 29, No. 5, 2003, pp. 333–336.
Original Russian Text Copyright © 2003 by Biologiya Morya, Chernyshev.
In this paper, we describe a new species belonging
to the nemertean genus
, which has been
encountered for the ﬁrst time in Russian waters. The
species of this genus are known to inhabit the coastal
waters of Europe (from the coast of Norway to the
Adriatic Sea), Australia, Madagascar, southeastern
Asia (Hong Kong), and the Persian Gulf.
MATERIALS AND METHODS
Living nemerteans were anesthetized in 7% MgCl
and ﬁxed in Bouin’s ﬁxative. The internal morphology
was studied on the transverse and sagittal sections cut
from two specimens. The sections (8
m thick) were
stained according to Crandall’s modiﬁcation of Mal-
lory’s method. Type material is deposited in the Zoo-
logical Museum of the Far-Eastern State University
Chernyshev sp. nov.
The species is named in memory of
Yuliya Nikolaevna Kondrikova.
Holotype (no. IX N–158/19947), serial
transverse sections: September 22, 2000, Vostok Bay,
Tikhaya Zavod’ Inlet, depth of 5–7 m, silt, collected by
A.V. Chernyshev and A.V. Martynov; paratypes (no. IX
N–159 and 160): ﬁve specimens were collected along
with the holotype, two specimens—September 24,
2000, Ussuriiskii Bay, Sukhodol Bay, depth of 6–8 m.
We also studied 29 additional specimens (deposited in
the museums of FESU and IMB FEB RAS) collected
from Ussuriiskii Bay, Amurskii Bay, and Posjet Bay.
Living specimens with rounded anterior
body and enlarged posterior body end. Integument col-
oration whitish. A pair of very short transverse cephalic
slits present. Longitudinal musculature of the body wall
with an internal layer of zigzag-shaped myoﬁbrils.
Rhynchodaeum epithelium dominated by granular aci-
dophilic glands, which are also abundant near the rhyn-
chopore; basophilic agranular glands are also present in
the rhynchodaeum epithelium. Muscular proboscis
wall thin, with an outer layer of longitudinal muscles
and an inner layer of circular muscles; proboscis epi-
thelium with nematocysts. Rhynchocoel extending for
0.80–0.95 of the body length. Longitudinal myoﬁla-
ments absent between gut and rhynchocoel. Buccal
nerves initially joined (but not fused completely), but,
as they approach mouth, they diverge from each other,
forming nerve plexuses here and there. Foregut entirely
enveloped by vascular plexus. Dorsal vessel protrudes
into rhynchocoel at the foregut level. Brain with one
dorsal commissure and one ventral commissure.
mens are 10–14 mm long. The anterior body end is
somewhat enlarged, slightly ﬂattened and rounded. The
cerebral organs open into a pair of short transverse slits.
The mouth is slightly stretched longitudinally. The pos-
terior body end is rounded and enlarged. The integu-
ment is whitish, semitransparent; a yellowish or pale
pink intestine is seen. At low magniﬁcation, one can
observe a small white structure (probably correspond-
ing to a cluster of subepidermal glands). In ﬁxed spec-
imens, the body is usually spirally coiled, the head
being narrower than the trunk.
Internal structure; epidermis.
The height of the
covering epithelium at the level of the brain (and ante-
rior to it), foregut, and intestine is 45–60, 37–45, and
m, respectively. We have distinguished ﬁve
New Species of the Genus
from the Sea of Japan and Validation
of the Family Hubrechtellidae
A. V. Chernyshev
Institute of Marine Biology, Far East Division, Russian Academy of Sciences, Vladivostok, 690041 Russia
Received April 4, 2003
—The paper includes a description of Hubrechtella juliae sp. nov. from Peter the Great Bay. Based on
the paraphyly of the family Hubrechtiidae s.l., we propose to combine the genera Hubrechtella, Tetramys, and
Coelia into the family Hubrechtellidae fam. nov.
: nemerteans, heteronemerteans, pilidium.