ISSN 1063-0740, Russian Journal of Marine Biology, 2016, Vol. 42, No. 4, pp. 368–371. © Pleiades Publishing, Ltd., 2016.
Original Russian Text © O.S. Voskoboinikova, 2016, published in Biologiya Morya.
A Find of the Juvenile of a Rare Lumpfish Species Georgimarinus
barbatus (Lindberg et Legeza, 1955) (Cottoidei: Cyclopteridae)
off the Southern End of the Paramushir Island, Kuril Islands
O. S. Voskoboinikova
Zoological Institute, Russian Academy of Sciences, University Embankment 1, St. Petersburg, 199034 Russia
Received February 4, 2016
Abstract—A juvenile specimen of the papillose lumpsucker Georgimarinus barbatus (Lindberg et Legeza,
1955) is first described and collated with juveniles of species of the close related genus Eumicrotremus.
Keywords: Cyclopteridae, Georgimarinus barbatus, juveniles
Finds of no more than ten adult papillose lump-
suckers Georgimarinus barbatus , which inhabit the
coastal waters of the east of the Aleutian Isls to the
north of Hokkaido Isl., have been described in the lit-
erature [2–4, 6–8]. A juvenile of this fish species was
found by the author of present paper in materials of the
R/V Vityaz collection. The lack of description of the
juvenile specimens of G. barbatus and the existence of
differences in the structure of juvenile and adult lamp-
fishes [3, 9] defined the objective of this study. In the
research the G. barbatus juvenile and species of the
“orbis” group were collated, as the identity of this spe-
cies and Eumicrotremus orbis (Günther, 1861) was
recently established by two mitochondrial markers,
viz., COI and Cyt B .
MATERIALS AND METHODS
Georgimarinus barbatus: ZIN no. 56051, one spc.
SL 29 mm, R/V Vityaz, cruise 18, st. 2764, demersal
trawl Sigsby, depth 38 m, May 22, 1954, Kuril Isls,
50°06′ N, 155°34′ E, expedition of the IO Aс. Sci.
USSR. ZIN no. 34841, holotype, one spc., SL 51.0
mm, TR Lebed’, st. 161, beam trawl, July 8, 1954,
Pacific Ocean at Cape Vasilyev of Paramushir Isl.,
depth 74 m, pebble bottom, collector M.I. Legeza.
ZIN no. 48898, one spc. SL 61.0 mm, TR Tik-
hookeanskiy, trawl, September 10 and 26, 1987, the
Kuril Isls to the east from the Kunashir Isl., 44°15′ N,
146°39′3″ E, depth 210–205 m, collectors S.D. Grebelny
and V.I. Lukin. Eumicrotremus asperrimus: ZIN
no. 55454, 39 spcs SL 32.3–61.7 mm, TR Adler,
trawl 262, Bering Sea, 62°46′ N, 179°07′ E, depth 93 m,
May 14, 1967, collector V.V. Fedorov. Eumicrotremus
derjugini: ZIN no. 12761, one spc. SL 26.3 mm, at
Svalbard Arch., 71°47′ N, 19°07′ W, July 9, 1901, col-
lectors M.N. Mikhaillovloskii and A.N. Volkovich. Eumi-
crotremus orbis: ZIN no. 42398, one spc., SL 27.3 mm, TR
Lebed’, Sigsby trawl, depth 98–108 m, November 7,
1964, off Pacific coast of Paramushir Isl., Fourth
Kuril Strait, collector, M.I. Legeza. Eumicrotremus
schmidti: ZIN no. 12957, one spc. SL 22.3 mm trawl 5,
April 20, 1902, Sea of Okhotsk at Reineke Isl., depth
20 fathoms, collector V.K. Brazhnikov. Eumicrotremus
taranetzi: ZIN no. 56052, 2 spcs SL 22.4 and 26.0 mm,
R/V Dmitry Peskov, trawl 7, pelagic trawl with vertical
opening 28 m, July 14, 2008, Sea of Okhotsk, Aniwa Bay,
46°00′ N, 142°21′ E, depth 33 m, collector D.R. Fayzulin.
The external morphology and structure of the seis-
mosensory system of lumpfish juveniles was studied
according to the standard procedure for this family
[1, 2, 10]. Specimens were measured with a caliper to
0.1 mm. The structure of the axial skeleton and the
rays of the unpaired fins underwent x-ray examina-
tion. The term “supernumerary” ray was used to refer
to the first ray of the dorsal and anal fins; it does not
have its pterygiophore and is connected to the dorsal
(or ventral) surface of the proximal pterygiophore of
the second ray . In the description the standard
abbreviations are accepted: D, the dorsal fin; A, the
anal fin; P, the pectoral fin; V, the pelvic fin; C, the
caudal fin; SL, the standard body length. The names
of seismosensory system channels are abbreviated as
follows: CSO, supraorbital; CIO, periorbital; CT,
temporal; CPM, preopercular-mandibular.
Morphology. D VI, I9; A 11 ; P 24; V I 5; C 1 + 5 +
4 + 1; vertebrae 11 + 16 = 27 (see figure).