1063-0740/02/2802- $27.00 © 2002
Russian Journal of Marine Biology, Vol. 28, No. 2, 2002, pp. 132–135.
Original Russian Text Copyright © 2002 by Biologiya Morya, Chernyshev.
Nemerteans of the genus
have long been known only from the coastal waters of
northern Europe until Gibson and Sundberg 
in Hong Kong. Species
of this genus are probably widely distributed in the
northern hemisphere because I recently found two new
species: one from the Sea of Japan and the
other from the Paciﬁc coast of Canada. The latter is
MATERIALS AND METHODS
The material (four specimens) was collected near
Vancouver and ﬁxed in 70% alcohol by T. A. Belan.
The internal morphology was studied using the best-
preserved specimen. Eight-
m cross sections were
stained using the Mallory technique in Crandall’s mod-
iﬁcation. The type material I was deposited in the Zoo-
logical Museum of the Far Eastern State University.
One paratype was passed to the National Museum of
Natural History (Smithsonian Institution, Washington,
The species was named after Aleksei
Viktorovich Zhirmunsky, a founder of the Institute of
Marine Biology FEB RAS.
The holotype (no. IX-18165, section
series) was isolated from a sample of marine ground at
a depth of 15 m near Vancouver on June 1, 1999. The
ground material was silt with large amount of wood,
often rotting. The paratypes (three specimens) were
collected in the same area (one specimen, in the area of
shipyard) and on similar grounds at a depth of 15–20 m
at the end of May and during ﬁrst half of June 1999.
The ﬁxed specimens lacked the hind end
of the body. The length of the best-preserved specimen
was 20 mm; its maximum width was 1 mm. The body
is cylindrical, with the fore end usually elongated. The
mouth appears as a small, slightly elongated opening.
The end of the anterior fourth of the body (based on the
length of the best-preserved specimen) is marked with
a thin light brown or brown ring. The body part in front
of the ring is light brown to light yellow or yellowish
gray. The rest of the body is light yellow and is virtually
unpigmented. At a short span from the pigment ring, a
pair of light lateral organs is situated. Lateral nerve
cords can be seen through the body coverings.
Integuments and musculature.
The covering epi-
thelium and dermis are, respectively, 28–50 and 2–
m high. In the head region, the dermis and outer cir-
cular musculature are separated with a nerve plexus,
the width of which varies from 16–26
m in the area in
front of the brain to 50–58
m within the brain region.
In the foregut region, a very thin (2–9
m) slightly col-
ored sheet of connective tissue is situated between the
dermis and circular musculature. The sheet contains
single subdermal glands that do not penetrate in to the
circular muscle layer. In the foregut region, three mus-
cle layers are distinguished: the outer circular layer (4–
m thick), the longitudinal layer (23–80
m), and the
inner circular musculature layer (3–7
m). There is no
oblique musculature. Behind the rhynchocoel, an inner
circular musculature layer is not present. The dorsal
cross of muscle layers is thin and sometimes indiscern-
able. A ventral cross is usually only seen in the prebrain
A New Nemertean,
from the Pacific Coast of Canada with a Special Reference
to Callineridae Taxonomy
A. V. Chernyshev
Institute of Marine Biology FEB RAS, Vladivostok, 690041, Russia
Received January 9, 2001
—The paper presents a description of a new nemertian,
sp.n., found near Van-
couver. The sensory system is represented by lateral organs. The circulatory system includes a pair of lateral
head lacunae and a short ventral lacuna. Four zones with speciﬁc structures are distinguished in the anterior
region of the proboscis. The rhynchocoel forms paired lateral and unpaired ventral pockets. The paper focuses
on the taxonomic status of Callineridae and provides a new diagnosis of the family.