A three specimen of
, belonging to Cottidae, Scorpaeniformes, was firstly collected from the East Sea, Korea during 2007-2009. We herein described the species as the first record from Korea on the basis of these specimens.
is characterized by the following morphological combinations: spinous scales absent on the base of dorsal fin; small ctenoid scales scattered on body sides; gill rakers are short, tubular, and relatively broad; the uppermost preopercular spine is sharp and simple; dorsal fin rays VIII-IX, 20-21; anal fin soft rays 18-19; pectoral fin rays 18, and vertebrae 40-41. New Korean name of
is proposed as “Min-jul-ga-si-hoet-dae.”
A total of approximately 275 species in about 70 genera are recognized in the family Cottidae, order Scorpaeniformes (Nelson, 2006); of those, 33 species in 18 genera have been recognized in Korea (Kim et al., 2005). The genus
Krøyer, 1845, is distinguished by the presence of a pelvic fin with one spine and three soft rays, small conical teeth on both jaws, vomer, and palatines. Four preopercular spines are present. Lateral line scales are tubular and flattened on lateral and medial surfaces (Nelson, 1984).
comprises 17 species worldwide, with three species previously recorded in Korea (Kim et al., 2005):
Schmidt, 1927, and
In this study, three specimens of
Matsubara and Iwai, 1951, were collected from Korea for the first time; we here describe the species on the basis of these specimens. Methods for counts and measurements follow those of Hubbs and Lagler (2004); the numbers of fin rays and vertebrae were counted by soft X-ray (Hitex HA-100; Hitex Co., Tokyo, Japan). The specimens are deposited in the National Institute of Biological Resources (NIBR), Korea.
Matsubara and Iwai, 1951: 87, figs. 1-3 (type locality: Off Uozu, Japan); Masuda et al., 1984: 324.
: Nakabo, 2002: 633; Tsuruoka et al., 2006: 51; Shinohara et al., 2011: 44.
2 specimens, 77.7-117.7 mm standard
Family Cottidae Bonaparte, 1832
GenusIcelusKrøyer , 1845
1*Icelus toyamensis(Matsubara and Iwai, 1951) (Table 1,Fig. 1)
Comparison of counts and measurement of Icelus toyamenesisParenthesis indicate average
Comparison of counts and measurement of Icelus toyamenesis Parenthesis indicate average
Icelus toyamenesis, NIBR-P4791, 118.2 mm standard length, collected from Hupo fishing ports.
Icelus cataphractus, PKU 5044, 141.18 mm standard length, collected from Yangyang.
length (SL), Gyeongsanbuk-do, Uljin-gun, Hupo-myeon, Hupo-ri, Hupo fishing ports, 18 Mar 2009, NIBR-P 4791. 1 specimen, 90.1 mm SL, Gangwon-do, Goseong-gun, Jukwangmyeon, Oho-ri, 18 Mar 2007, Kim AR, NIBR-P 0000016324, from a deep sea water pump at 300 m water depth.
Comparative material examined.
, 1 specimen, 141.18 mm SL, Gangwon-do, Yangyang, 2 Dec 2010, PKU 5044 (
Counts and measurements are shown in Table 1. Body slightly compressed; head large and slightly depressed. Snout short and blunt. Mouth terminal; anterior tip of lower jaw projecting further than anterior tip of upper jaw. Conical teeth on both jaws; small teeth on vomer and palatines. Eyes large; interorbital space very narrow and flat. Pair of small sharp nasal spines directed posterodorsally on anterior nostril. Pair of strong spines in occipital region. Four preopercular spines; uppermost spine simple, sharp, slightly curved upward, and longer than the other three spines, which are short. Gill rakers 2+9; those on the lower limb short, rounded or tubular in shape, and with spiny processes on upper surface. Small spines scattered on suborbital, cheek, and nuchal regions. Origin of dorsal fin vertically above upper end of gill opening; dorsal fin extends until above 32nd-33rd lateral line scale; dorsal spine rays and soft rays smoothly separated. Pectoral fin relatively long, extending posteriorly to below 5th-6th dorsal fin ray. Pelvic fin small; begins under lower base of pectoral fin and extends to anus. Caudal fin slightly rounded and truncate. Small scattered ctenoids; rare on dorsal and ventral sides. Lateral line scales tubular and sparse, extending from opercular flap to base of caudal fin.
After fixation in formalin: body and head uniformly blackish brown; snout and circumorbital regions black; posterior margin of dorsal fin spines blackish, with
A base of dorsal fin. A, Icelus toyamenesis, NIBR-P4791; B, Icelus cataphractus, PKU 5044. Scale bars: A, B=1mm.
Gill-rakers on the first arch. A, Icelus toyamenesis, NIBR-P4791; B, Icelus cataphractus, PKU 5044.
several irregular dark brown bars on dorsal fin soft rays, pectoral fin rays, and caudal fin rays (
was collected from Korea, in Goseong, Gangwon-do and Hupo, Gyeongsangbuk-do. The species also occurs in the Niigata and Ishikawa prefectures, Japan (Nakabo, 2002).
The specimens collected in Goseong, Gangwondo and Hupo, Gyeongsangbuk-do, belong to the genus
, based on the presence of teeth on the vomer and palatine, the presence of small spines on occipital, cheek, and nuchal regions (Krøyer, 1845; Matsubara and Iwai, 1951; Nakabo, 2002), and the presence of small scattered ctenoids on the dorsal and ventral sides of the body (Matsubara and Iwai, 1951; Nakabo, 2002). When compared with the original description (Matsubara and Iwai, 1951) and other references (Watanabe, 1981; Nakabo, 2002), most of the meristic characters correspond to those described by other authors, except for the number of caudal fin rays and the number of lower limbs of the gill rakers. These differences are thought to be related to geographic variations, but the correspondence of variations to geographic provinces requires further clarification.
Uppermost preopercular spine. A, Icelus toyamenesis, NIBR-P4791, sharp and simple; B, Icelus cataphractus, PKU 5044, bifurcated. Scale bars: A, B=0.5 mm.
When compared with the congeneric species
, our specimens of
are similar in terms of counts and measurements, but differ in terms of morphological characteristics. These are distinguished by the absence of spinous scales on the base of the dorsal fin in
vs. their presence in
). Also, the gill rakers in
are short, tubular, and relatively broad, whereas those in
are large, circular, and relatively narrow (
). Lastly, the uppermost preopercular spine in
is sharp and simple, whereas the preopercular spine in
is bifurcate (
are distinguished from
by the distributions of body scales (scattered in
vs. arranged in rows in
) (Nelson, 1984; Nakabo, 2002; Kim et al., 2005). We propose a new Korean name for
, “Min-julga- shi-hoet-dae.”
Korean name: 1*민줄가시횟대
Neue Angaben ?ber die Systematik undgeographische Verbreitung der zweih?rnigen pazifischenIcelus-Arten.
Zoologische Jahrb?cher, Abteilung für Systematik, Geographie und Biologie der Tiere
Fishes of the Great Lakes region.Revised ed.
University of Michigan Press
Ann Arbor, MI
Illustratedbook of Korean fishes.
Kyo-Hak Publishing Co.
Ichthyolgiske bidrag. 7. Icelus hamatus.
The fishes of the Japanese Archipelago.
Tokai University Press
291, 324 -
A new cottid fish found in ToyamaBay.
Miscellaneous Reports of the Research Institute for Natural Resources, Tokyo
Cottidae. In: Fishes of Japan with pictorial keysto the species. English ed. (Ed., Nakabo T).
Tokai University Press
Systematics and distribution of cottid fishesof the genera Rastrinus and Icelus.
Occasional Papers of the California Academy of Sciences
Fishes of the world.
John Wiley and Sons, Inc.
Fishes of Peter the Great Bay.
Trudy Obshchestva Estestvoispitateleipri Imperatorskom Kazanskom Universitet
A revision of the genus Icelus Kr?yer (Pisces:Cottidae) with the description of a new species from theOkhotsk Sea.
Ezhegodnik Zoologicheskogo Muzeya Akademii Nauk SSSR
Preliminarylist of the deep-sea fishes of the sea of Japan.
Bulletin of the National Museum of Nature and Science, Series A (Zoology)
A new cottid species,Icelus sekii (Perciformes: Cottoidei), from Hokkaido, Japan.
Supplements to Fauna Japonica, Cottidae(1960).
Bulletin of the Biogeography Society of Japan