ISSN 1063-0740, Russian Journal of Marine Biology, 2017, Vol. 43, No. 1, pp. 99–100. © Pleiades Publishing, Ltd., 2017.
Original Russian Text © V.N. Dolganov, 2017, published in Biologiya Morya.
Rhinochimaeridae (Chimaeriformes): a New Familly
of Chimaeras for the Fauna of Russia
V. N. Dolganov
Zhirmunsky Institute of Marine Biology, Far East Branch, Russian Academy of Sciences, Vladivostok, 690041 Russia
Received May 19, 2016
Abstract⎯The description of the Pacific long-nosed chimaera Rhinochimaera pacifica (length 100 cm),
which was first caught in Russian waters off the Southeastern coast of Sakhalin Island, is given.
Keywords: Pacific long-nosed chimaera Rhinochimaera pacifica, Southeast Sakhalin, morphometric data
DOI: 10.1134/S10630740170100 47
Only individual captures of two species of chimae-
ras: Hydrolagus barbouri Garman, 1908 and H. pur-
purescens Gilbert, 1905, which belong to the family
Chimaeridae [1–3], are known to the Far East seas of
Russia. The big-nosed chimaera of the family Rhino-
chimaeridae, which is widespread in the Pacific, is
presented in Eastern Japan by two species: Rhinochi-
maera pacifica (Mitsukuri, 1895) and R. africana
Compagno, Stehmann et Ebert, 1990, which is dis-
tinct in its snout shape, the position of the channels of
the seismosensory system, and coloration . The
pacific long-nosed chimaera R. pacifica, which inhab-
its depths of 750–1100 m from New Zealand and Peru
to Japan , has been observed as well at Northern
In this paper, one specimen of R. pacifica, which
was caught during the cruise of the Taki-Maru 85 for
the first time in Russian waters off the Southeastern
Sakhalin in June 1997, is described, Rhinochimaera
pacifica (Mitsukuri, 1895) (figure).
Materials. 1 spc. TL 100 cm, maturing male.
Southeast coast of Sakhalin Island, 47°34′ N, 144°47′ E,
June 22, 1997, Tieki Maru 85, bottom trawl, depth
1093–1280 m. The collector was V.N. Dolganov.
Description. The body is elongate, laterally com-
pressed. The head is large, the snout long, pointed,
with a flattened front. Lateral line channels in the
form of open groove. Connection of supraorbital and
infraorbital channels on the underside of the snout
located approximately midway between the tip of the
snout and nasal canal. The dorsal spine approximately
equal to the height of the first dorsal fin; it is free from
the top of it for approximately 1/2 of its length. The
upper edge of the second dorsal fin is uncut. Anal fin
fused with the caudal, which continued with long tail
thread. The upper lobe of the caudal fin low, its edge
has a series of regularly spaced denticles. The top of the
pectoral fin slightly does not reach the beginning of
the pelvic fins. Head tenaculum on the snout in front
of the eyes, its inner surface without thorns. Each
tenaculum before the pelvic fins with five middle-
sized spines. Pterigopodia are thin, single. Their tops
with a small number of spines directed forward. Den-
tal plates are thin, smooth. In the spiral valve three
complete and one incomplete round.
Measurements, mm. Distance from the end of the
snout to the first dorsal fin, 328; to the second dorsal
fin, 442; to the tail, 715; up to the pectoral fins, 335; to
the ventral fin, 507; to the anus, 502. Snout to eye dis-
tance, 246. The horizontal diameter of the eye, 26.
The distance between the eyes, 35.5. Mouth width, 42.
The height of the fins: the first dorsal, 89; second dor-
sal, 39. The height of the dorsal spines, 87. The length
of the front edge of the pectoral fin, 170; of the
abdominal fin, 101. The distance from the beginning
of the pectoral fin to the beginning of the abdominal
The gonads are of the same size; their length, 36
mm; width, 18 mm. In the stomach of the chimaera
the skeleton of a small grenadier and the remains of
brittle stars were found.
Live body coloration, the bases of the pectoral and
pelvic fins are plain brown–gray. The lower snout sur-
face is light. The fins are darker than the body, pur-