Title

First Records of Two Labrid Fishes, Iniistius trivittatus andLeptojulis lambdastigma (Teleostei: Perciformes), fromThailand and Malaysia

Author(s)MATSUNUMA, Mizuki; Siti Tafzilmeriam S. A. K.; Yusri
Yusuf; MOTOMURA, Hiroyuki

Citation

鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries
Kagoshima University

Issue Date

2010-12-25

URL

http://hdl.handle.net/10232/12920

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Mem. Fac. Fish. Kagoshima Univ.,Vol. 59, pp. 27~35 (2010)

First Records of Two Labrid Fishes, Iniistius trivittatus and Leptojulis
lambdastigma (Teleostei: Perciformes), from Thailand and Malaysia
Mizuki Matsunuma 1*, Siti Tafzilmeriam S. A. K. 2, Yusri Yusuf 2 and Hiroyuki Motomura 3

Key words: Labridae, distribution, South China Sea

Abstract
The razorfish Iniistius trivittatus (Randall and Cornish, 2000), previously recorded only from Taiwan, Hong Kong and Vietnam, andthe wrasse Leptojulis lambdastigma Randall and Ferraris, 1981, previously from Taiwan and the Philippines, are redescribed on thebasis of four and six specimens, respectively, collected from Thailand and Malaysian waters. The range extensions of the two species
both indicate wide South China Sea distributions.

Materials and Methods

The razorfish (Perciformes: Labridae), Iniistius trivittatus,1)

as Xyrichtys

Counts and measurements of I. trivittatus and L.

trivittatus on the basis of two specimens, has to date been

lambdastigma follow Randall and Cornish 1) and Randall 4),

1–2)

.

respectively. Standard length is expressed as SL. Vertebral

The wrasse, Leptojulis lambdastigma, originally describedcounts were made from X-ray images. Institutional

originally described by Randall and Cornish

recorded only from Taiwan, Hong Kong and Vietnam
3)on the basis of eight specimens

abbreviations used in this paper are as follows: BPBM—

from the Philippines, has previously been recorded only from

Bernice Papuahi Bishop Museum, Honolulu; KAUM—

by Randall and Ferraris

Taiwan and the Philippines

3–4)

.

Kagoshima University Museum, Kagoshima; NTUM—

During surveys of the marine fish fauna off Terengganu,

National Taiwan University, Institute of Zoology, Taipei;

Malaysia, east coast of the Malay Peninsula, conducted

UMT—South China Sea Biodiversity Museum at Institutein December 2008 and January 2009, two individuals ofof Oceanography, University Malaysia Terengganu, Kuala

I. trivittatus and three individuals of L. lambdastigma

Terengganu; and USNM—Museum Support Center of thewere obtained at local fishing ports in Kuala Terengganu.

Smithsonian Institution National Museum of Natural History,

Subsequently, two and three additional specimens of I.

Suitland.

trivittatus and L. lambdastigma, respectively, were obtained

Comparative materials of I. trivittatus are as follows:

at a local fish market in Mahachai, Samut Sakhon Province,

USNM 330073, paratype of Xyrichtys trivittatus, male, 128.4

Thailand in September 2009. These specimens are described

mm SL, purchased at local fish market in Vung Tau, Vietnam

here as the first records of the two species from the Gulf

(10°21′N, 107°15′E), 19 Jan. 1973, D. de Sylva; USNM

of Thailand, the Malaysian specimens representing the357411, male, 130.2 mm SL, collected with USNM 330073.

southernmost records for each species.

1

鹿児島大学大学院連合農学研究科 (The United Graduate School of Agricultural Sciences, Kagoshima University, 1-21-24 Korimoto, Kagoshima
890-0065, Japan)
2
マレーシア・トレンガヌ大学海洋学研究所 (Institute of Oceanography, Universiti Malaysia Terengganu, Mengabang Telipot, 21030 Kuala
Terengganu, Terengganu, Malaysia)
3
鹿児島大学総合研究博物館 (The Kagoshima University Museum, 1-21-30 Korimoto, Kagoshima 890-0065, Japan)* Corresponding author, E-mail: k1139853@kadai.jp

28Mem. Fac. Fish. Kagoshima Univ., 59 (2010)

Fig. 1. Fresh specimens of Iniistius trivittatus. A, KAUM–I. 16945, male, 117.1 mm SL, obtained at Cendering
Port in Kuala Terengganu, Terengganu, Malaysia. B, KAUM–I. 23878, male, 121.5 mm SL, obtained atfish market in Mahachai, Samut Sakhon Province, Thailand.

Fig. 2. Fresh specimen of Leptojulis lambdastigma. KAUM–I. 17035, male, 101.6 mm SL, obtained at Pulau
Kambing Port in Kuala Terengganu, Terengganu, Malaysia.

Matsunuma et al.: Two labrid fishes from Thailand and Malaysia

29

Results and Discussion

anterior section beginning just above upper origin of gill

Iniistius trivittatus (Randall and Cornish, 2000)

opening, ending below bases of 9th to 10th dorsal-fin soft(Figs. 1, 3; Table 1)

rays; posterior section beginning below base of 11th dorsalfin soft ray, reaching on caudal-fin base. Origin of dorsal

Xyrichtys sp. 1: Shen and Yeh, 1987

5)

: 64, fig. 12(Nanfangao, Taiwan)

fin slightly or well posterior to a vertical through posterior
margin of orbit; dorsal-fin spines extremely slender, flexible,

Xyrichtys pavo (not of Valenciennes): Shen, 1993 6): 469,
pl. 156, fig. 5 (Taiwan)

first dorsal-fin spine curved, shorter than longest dorsal-fin
soft ray; membrane between 2nd and 3rd dorsal-fin spines

1)

Xyrichtys trivittatus Randall and Cornish, 2000 : 18, fig. 1(type locality: Lamma Island, Hong Kong)
Iniistius trivittatus: Randall and Jonsson, 2008 7): 179, fig. 1(Vietnam)incised to approximately half length of 3rd spine; gap between
bases of 2nd and 3rd spines about 1.5 times larger than thoseof adjacent interspinous spaces. Origin of anal fin below lastdorsal-fin spine base. Pectoral fin relatively large, upper 2
rays unbranched, remaining rays branched; upper origin ofMaterial examined. KAUM–I. 16945, male, 117.1 mm SL,

fin below base of 3rd dorsal-fin spine; posterior tip of finsouthern South China Sea, off east coast of Malay Peninsula,extending slightly beyond a vertical through base of 3rd anal-

obtained at Cendering Port in Kuala Terengganu, Malaysia,

fin spine. Pelvic fin relatively large, all rays branched; origin

bottom trawl, 11 Dec. 2008; KAUM–I. 23878, male, 121.5

of fin slightly anterior to a vertical at upper origin of pectoral

mm SL, Gulf of Thailand, probably from Thai waters,

fin; posterior tip of depressed pelvic fin just short of a verticalobtained at fish market at Mahachai, Samut Sakhon Province,at origin of anal fin; caudal fin short, well rounded. Vertebrae

Thailand, bottom trawl, 24 Sept. 2009; KAUM–I. 23879, sex

9 + 16 = 25 (based on KAUM–I. 16945, 23878, and 23879).

unknown, 119.5 mm SL, collected with KAUM–I. 23878;

Color when fresh. Based on color photographs of fresh

UMTF 1895, male, 133.0 mm SL, southern South China Sea,

specimens (Fig. 1). Body yellowish-dusky gray, whitish

off east coast of Malay Peninsula, obtained at Pulau Kambing

ventrally, darkish dorsally; edge of scales on body side darker

Port in Kuala Terengganu, Malaysia, bottom trawl, 11 Jan.

than center; three vertical blackish bars on body side, first

2009. All specimens were collected by M. Matsunuma and S.

from between bases of 5th and 6th dorsal-fin spines, second

A. K. Siti Tafzilmeriam.

from between bases of 3rd and 4th dorsal-fin soft rays, third

Description. Counts and measurements of specimens offrom between bases of 9th and 10th dorsal-fin soft rays; an

I. trivittatus from the Gulf of Thailand and the southern

indistinct large blackish blotch on center of caudal peduncle;

South China Sea are shown in Table 1. Body extremely deep,

a median pale blue line on forehead; iris with an inner rim

compressed. Snout long, its dorsal profile nearly vertical;of yellow and outer ring of reddish-pink. Dorsal, anal andremaining head profile strongly convex. Gill opening large.

pelvic fins pale yellow; dorsal and anal fins with orange or

Eye small, high on head. Mouth small, horizontal; posterior

red margin; upper portion of dorsal fin anteriorly from 3rd

margin of maxilla just reaching or short of a vertical throughdorsal-fin spine pale red; posteriorly a thin wavy orange line

anterior margin of orbit; lips well developed; jaws with ajust above base of dorsal fin from 4–6th dorsal-fin spine; analpair of long curved caniniform teeth, tips extending above

fin with several broken white lines with pale blue margin, orand below lips when mouth closed; no caniniform tooth at

two complete wavy lines; pectoral fins transparent, edges ofmouth corner; side of jaws with a row of stout conical teeth,rays dusky, base with a blue margined white arc; pelvic fin

an inner band of small nodular teeth. Body, including base of

uniformly pale yellow; caudal fin pale blue, yellowish basally,

caudal fin, covered with large cycloid scales, except for much

blackish distally, red spots forming irregular short bars onof head and remaining fin bases; scales thin, with membrane

uppermost edge.

on posterior margin; size of ventral body scales about halfheight of those on body side. Head naked, except for 2–3

Color of preserved specimen similar to fresh, but body alittle browner; red, yellow and blue coloration lost.

scales dorsoanteriorly on opercle; a broad band of small

Remarks. The present specimens from the Gulf of Thailand

scales beginning with 7–8 rows just below eye, ending withand the southern South China Sea were identified as Iniistius

3–4 rows behind corner of mouth. Lateral line interrupted;

trivittatus, following the diagnostic characters of that species

30

Mem. Fac. Fish. Kagoshima Univ., 59 (2010)

given by Randall and Cornish 1): 1st and 2nd dorsal-fin spines

119.5 mm SL specimen (KAUM–I. 23879) having the fin

shorter than longest dorsal soft ray; a broad band of small

with thin orange margin and 2 continuous bluish lines, 121.5

scales on cheek; 2 or 3 scales dorsally on opercle; 15 or 16 gillmm SL specimen (KAUM–I. 23878) having the fin with arakers; 3 blackish bars on upper half of body; and a medianbroad red margin (about 1/3 width of anal fin height) andpale blue line on forehead.

2 continuous bluish lines, and 133.0 mm SL (UMTF 1895)

Small variations in some counts and measurements

having the fin with thin orange margin and 2 discontinuous

were recognized between the present specimens, including

bluish lines. A 129.4 mm SL specimen (NTUM 7136; ascomparative materials, and the original description of the

Xyrichtys sp. 1) from Taiwan was reported by Shen and Yeh 5)

species (see Table 1): e.g., 3–6 branched dorsal-fin soft rays

as having the anal fin with a reddish edge. The specimen was(vs. 4 in the original description), 5–11 branched anal-fin

subsequently designated as a paratype of X. trivittatus bysoft rays (vs. 3), 12 or 13 pectoral-fin rays (vs. 12), 16–18

Randall and Cornish 1). Moreover, the 118 mm SL holotype ofcircumpeduncular scales (vs. 19 or 20), 14 or 15 total gill

X. trivittatus (BPBM 38550) from Hong Kong was reported

rakers (vs. 15 or 16), lower body depth mean 37.4 (range

by Randall and Cornish 1) as having the anal fin with a pink

35.9–38.4) %SL [vs. 38.7 (38.5–38.9)], narrower body width

margin. Shen and Yeh 5) and Randall and Cornish 1) did not

10.4 (9.7–11.2) %SL [vs. 12.4 (11.4–13.0)], larger orbit

mention the bluish lines on the middle and base of the anal

diameter 5.8 (5.9–7.0) %SL [vs. 5.3 (5.1–5.5)] and wider

fin were continuous (like Fig. 1B) or discontinuous (likeinterorbital width 6.2 (5.1–6.7) %SL [vs. 4.6 (4.5–4.6)]. These

Fig. 1A) lines. Although the relationships between theseminor differences are treated here as intraspecific variations

color differences of the anal fin and body sizes were notbecause the original description of the species was based on

significantly, width of orange to red margin and discontinuous

only two specimens of similar size. Differences in coloration

bluish lines on the fin most likely to become wider and beingof anal fin were apparent between the present specimens (Fig.

continuous lines, respectively with growth. Thus these color

1); 117.1 mm SL specimen (KAUM–I. 16945) having thedifferences between the specimens, plus previous records, are

fin with thin orange margin and 2 discontinuous bluish lines,

regarded here as ontogenetic changes. Detailed examinations

Fig. 3. Previous records of I. trivittatus (open circles) and L. lambdastigma (open stars), and present specimens of I. trivittatus (closed circles) and L.
lambdastigma (closed stars). Some symbols represent more than one specimen.

Matsunuma et al.: Two labrid fishes from Thailand and Malaysia

31

based on greater range of specimens are required to confirm

Samut Sakhon Province, Thailand, bottom trawl, 10 Sept.

these morphological and color variations of I. trivittatus.

2009; KAUM–I. 23429, male, 100.7 mm SL, Gulf ofIniistius trivittatus has been previously recorded only from
1–2)

Thailand, probably from Thai waters, obtained at fish market. Recently, Randall

at Mahachai, Samut Sakhon Province, Thailand, bottom

reported numerous specimens of I. trivittatus

trawl, 24 Sept. 2009; KAUM–I. 24122, male, 102.5 mm SL,

purchased from Swedish food markets, imported from Vung

collected with KAUM–I. 23429. All specimens were collected

Tau, Vietnam. However, the present specimens represent theby M. Matsunuma and S. A. K. Siti Tafzilmeriam.

Taiwan, Hong Kong and Vietnam
and Jonsson

7)

first records of the species from Thai and Malaysian waters,

Description. Counts and measurements of specimens of

the latter being the southernmost record of the species, someL. lambdastigma from the Gulf of Thailand and the southern

600 km southwest from previously known localities (Fig. 3).

South China Sea are shown in Table 2. Body elongated,

Although records of I. trivittatus are limited, the present

relatively compressed. Head pointed; dorsal profile ofspecimens indicate that the species is widely distributed onhead nearly straight, nape slightly convex; snout relatively

the East and South east Asian Continental Shelves, from

long; orbit relatively small; interorbital space flat medially,

Taiwan south to the east coast of the Malay Peninsula androunded at edges. Mouth terminal, slightly oblique, relatively

southeastwards to Borneo. The fact that I. trivittatus has notlarge; posterior margin of maxilla just reaching a verticalbeen recorded from isolated islands in the western Pacificthrough anterior margin of orbit; jaws with two pairs of(e.g. the Philippines) also suggests that the species occurs

large caniniform teeth anteriorly, posterior pair much larger,

only in shallow waters around the continental coast. Iniistius

strongly recurved and outcurved; first pair of caniniform teeth

trivittatus is one of the common sandy bottom labrid fishes,

in upper jaw forward projecting and slightly divergent; side of

captured by bottom trawl, observed throughout the landing

jaws with small conical teeth in 2–3 rows; a single caniniform

ports surveys in Terengganu, along with Xiphocheilus typus

tooth (absent on one side in one specimen; two on one

Bleeker, 1857 and Leptojulis lambdastigma off Terengganu.

side and both sides in two and one specimen, respectively)
posteriorly on upper jaw (at mouth corner); a band of small
nodular teeth medial to outer row of teeth in both jaws. Gill

Leptojulis lambdastigma Randall and Ferraris, 1981

opening relatively large; gill rakers short, longest raker on(Figs. 2–3; Table 2)

first gill arch approximately one-third length of longest gill
filament. Body covered with large cycloid scales, head and3)

Leptojulis lambdastigma Randall and Ferraris, 1981 : 93,

bases of fins except for caudal fin naked; size of ventral body8)

scales about half height of those on body side; small scales on

187, fig. 15 (Taiwan); Randall, 1996 : 8, pl. II A, fig. 2nape extending forward nearly to a vertical through posterior(Taiwan, Philippines); Chen 9), 2004: 462, pl. 151, fig. 1

margin of orbit; lateral line complete. Origin of dorsal fin(Taiwan)nearly to a vertical at posterior end of opercular membrane;

fig. 5 (type locality: Samar Sea, Philippines); Shao, 1986 :4)

dorsal-fin spines slender, longer with posteriorly; longest
Material examined. KAUM–I. 17035, male, 101.6 mm SL,

dorsal-fin spine shorter than that of dorsal-fin soft rays; allsouthern South China Sea, off east coast of Malay Peninsula,dorsal-fin soft rays branched. Origin of anal fin below baseobtained at Pulau Kambing Port in Kuala Terengganu,

of 9th dorsal-fin; 1st anal-fin spine short, close set with 2nd

Malaysia, bottom trawl, 17 Dec. 2008; KAUM–I. 17183,

anal-fin spine; 3rd anal-fin spine longest; all anal-fin softmale, 118.3 mm SL, southern South China Sea, off east coastrays branched. Origin of pectoral fin below a vertical throughof Malay Peninsula, obtained at fishing port in Kuala Besut,

base of 1st dorsal-fin spine; posterior tip of pectoral fin justMalaysia, bottom trawl, 5 Jan. 2009; KAUM–I. 17206, male,reaching to a vertical through base of 9th dorsal-fin spine;

125.3 mm SL, southern South China Sea, off east coast of

uppermost ray of pectoral fin unbranched, remainding rays

Malay Peninsula, obtained at Pulau Kambing Port in Kuala

branched. Pelvic fin relatively long, 1st ray elongate; posterior

Terengganu, Malaysia, bottom trawl, 10 Jan. 2009; KAUM–

tip of depressed fin reaching anterior margin of anus. Caudal

I. 23275, male, 83.6 mm SL, Gulf of Thailand, probably

fin somewhat rounded tending to rhomboid. Vertebrae 9 + 16

from Thai waters, obtained at fish market at Mahachai,= 25 (based on KAUM–I. 17035, 17183, and 24122).

LocalitySex
SL (mm)Dorsal-fin rays (branched rays)
Anal-fin rays (branched rays)
Pectoral-fin rays
Pelvic-fin rays
Principal caudal rays
Pored lateral-line scales
Scales above / below lateral line
Scales between middle dorsalfin spine base to lateral line
Circumpeduncular scales
Gill rakers
Branchiostegal rays
Body depth (%SL)
Body width
Head length
Snout length
Orbit diameter
Interorbital width
Upper-jaw length
Caudal-peduncle depth
Caudal-peduncle length
Predorsal-fin length
Preanal-fin length
Prepelvic-fin length
Dorsal-fin baseFirst dorsal-fin spine
Second dorsal-fin spine
Third dorsal-fin spine
Ninth dorsal-fin spineLongest dorsal-fin soft ray
Anal-fin baseFirst anal-fin spine
Second anal-fin spine
Third anal-fin spineLongest anal-fin soft ray
Caudal-fin length
Pectoral-fin length
Pelvic-fin spine length
Pelvic-fin length

Registration number

UMTF
1895

2
18
5 + 10 = 15
5
38.0
10.3
32.4
18.0
5.9
5.6
10.4
16.3
8.3
26.5
55.3
30.2
72.3
13.5
11.7
—
12.9
17.3
41.4
4.8
—
—
16.3
23.4
25.0
9.5
24.2

2.5

16
4 + 10 = 14
5
38.4
9.8
33.9
18.9
6.2
5.2
10.2
16.1
7.6
25.4
52.8
32.1
78.4
13.3
12.5
—
—
18.0
42.0
—
7.1
8.5
17.5
25.6
25.8
10.0
24.3

Malaysia
male
male
117.1
133.0
IX, 12 (6)IX, 12 (4)III, 12 (11)III, 12 (5)
13
12
I, 5
I, 5
13
12
20 + 520 + 55 / 11
5 / 11

KAUM–I.
16945

17
6 + 9 = 15
5
36.2
10.6
31.4
17.4
7.0
6.5
9.5
15.2
6.7
28.1
53.7
29.1
74.2
11.0
10.9
—
13.4
14.1
41.4
4.9
—
8.0
13.3
22.1
21.9
10.8
20.7

2

male
121.5
IX, 12 (4)III, 12 (7)
12
I, 5
13
—
5 / 102.5

unknown
119.5
IX, 12 (3)III, 12 (5)
12
I, 5
13
19 + 55 / 11

KAUM–I.
23879

18
5 + 10 = 15
5
35.9
9.7
31.0
17.1
6.1
5.6
9.5
15.2
6.7
27.5
54.4
28.5
74.9
—
11.0
—
11.9
13.6
42.5
4.9
—
7.0
13.9
22.0
23.0
—
21.5

ThailandThis study
KAUM–I.
23878
USNM
330073Paratype18
5 + 9 = 14
5
37.7
11.2
33.8
—
6.1
5.1
11.3
14.8
8.1
—
51.6
29.3
—
—
—
—
—
17.2
42.2
6.4
8.8
10.5
16.2
24.6
24.4
10.5
24.2

2
18
6 + 9 = 15
5
38.2
10.8
33.3
18.8
6.0
6.7
10.7
15.6
8.6
28.5
54.8
28.9
75.4
15.7
14.0
12.6
13.6
17.8
41.5
6.3
7.9
11.4
16.7
27.2
24.0
11.7
26.9

2.5

Vietnam
male
male
125.3
128.4
—, 12 (4)IX, 12 (5)III, 12 (3)III, 12 (8)
12
12
I, 5
I, 5
12
13
—
20 + 4— / 105 / 10USNM
357411

Table 1. Counts and proportional measurements, as percentages of standard length, of specimens of Iniistius trivittatus, including type materials.

19
15 (total)
5
38.9
13.0
31.8
18.5
5.1
4.5
10.4
16.0
8.7
28.4
52.1
28.8
75.3
14.9
13.8
—
14.1
18.3
42.2
6.9
9.0
11.8
17.3
25.5
24.8
12.5
26.5

2.5

20
16 (total)
5
38.5
11.4
31.7
17.5
5.5
4.6
10.0
16.9
8.4
28.1
51.5
28.1
75.0
13.8
13.0
12.7
15.1
17.7
44.0
—
—
10.4
17.0
25.4
22.6
11.9
22.9

2.5

Randall and Cornish (2000)
NTUM
BPBM
7136
38550
Paratype
Holotype
TaiwanHong Kong
male
male
128
118
IX, 12 (4)IX, 12 (4)III, 12 (3)III, 12 (3)
12
12
I, 5
I, 5
12
13
20 + 520 + 56 / 11
6 / 11

32
Mem. Fac. Fish. Kagoshima Univ., 59 (2010)

male
101.6
IX, 12
III, 12
13
I, 5
14
27
4 / 1019
7 + 10 = 17
6
29.4
10.2
31.9
10.9
5.9
6.2
9.1
13.4
7.2
31.0
56.4
30.6
5.4
6.1
10.1
16.3
4.2
—
—
14.0
22.9
22.0
9.9
21.2

Registration number

LocalitySex
SL (mm)Dorsal-fin rays
Anal-fin rays
Pectoral-fin rays
Pelvic-fin rays
Principal caudal rays
Pored lateral-line scales
Scales above / below lateral line
Circumpeduncular scales
Gill rakers
Branchiostegal rays
Body depth (%SL)
Body width
Head length
Snout length
Orbit diameter
Interorbital width
Upper-jaw length
Caudal-peduncle depth
Caudal-peduncle length
Predorsal-fin length
Preanal-fin length
Prepelvic-fin length
First dorsal-fin spine
Second dorsal-fin spine
Ninth dorsal-fin spineLongest dorsal-fin soft ray
First anal-fin spine
Second anal-fin spine
Third anal-fin spineLongest anal-fin soft ray
Caudal-fin length
Pectoral-fin length
Pelvic-fin spine length
Pelvic-fin length

Malaysia
male
118.3
IX, 12
III, 12
13
I, 5
14
27
4/9
19
7 + 8 = 15
6
27.7
10.3
30.9
11.0
5.7
6.3
9.1
13.1
7.9
31.5
54.4
31.5
—
—
10.8
15.3
4.7
—
8.5
15.4
20.5
20.4
10.4
21.7

KAUM–I.
17183

Means in parentheses include data for holotype*
Combined data for paratypes from Randall and Ferraris 3)

KAUM–I.
17035

male
125.3
IX, 12
III, 12
13
I, 5
14
27
4/9
18
7 + 10 = 17
6
29.7
11.3
31.8
11.4
5.4
6.9
9.5
13.2
8.3
30.2
52.8
31.4
5.5
6.9
11.7
16.4
5.8
8.3
9.3
16.2
21.5
21.8
12.1
—

KAUM–I.
17206

male
83.6
IX, 12
III, 12
13
I, 5
14
27
4/9
18
5 + 11 = 16
6
—
9.9
33.1
11.0
7.4
6.9
9.2
11.1
6.5
32.4
57.9
32.4
5.6
6.5
10.9
15.1
4.4
7.2
9.1
15.6
21.1
22.2
10.3
18.3

KAUM–I.
23275

This study

Thailandmale
100.7
IX, 12
III, 12
13
I, 5
14
27
4 / 1018
7 +11 = 18
6
27.0
10.9
30.5
10.7
6.3
6.2
9.4
12.6
7.6
29.3
54.6
32.0
6.0
7.2
10.8
14.4
4.9
6.9
9.4
14.1
20.4
20.8
10.5
19.4

KAUM–I.
23429

male
102.5
IX, 12
III, 12
13
I, 5
14
27
4/9
17
7 + 12 = 19
6
28.1
11.2
31.4
10.5
6.4
6.8
9.6
13.2
7.8
30.1
55.0
31.1
5.3
—
11.1
14.9
5.6
6.8
8.8
14.4
21.1
20.6
10.8
22.0

KAUM–I.
24122

male
117.8
IX, 12
III, 12
13
I, 5
14
27
4/9
19
20 (total)
6
27.2
10.4
30.9
11.3
5.8
5.3
—
11.9
8.8
29.6
52.6
29.7
5.7
—
10.5
17.2
4.6
—
—
15.5
—
20.2
9.5
27.4

BPBM
26408
Holotype

88.2–136.5
VIII–IX, 12–13
III, 12
13
I, 5
14
27
4 / 9–10
17–19
17–19 (total)
6
25.6–27.1 (26.4)
10.0–11.8 (11.0)
30.5–31.9 (31.2)
10.3–11.1 (10.8)
5.2–6.5 (5.9)
5.2–5.6 (5.4)—
11.8–12.8 (12.1)
7.9–8.4 (8.3)
29.5–30.9 (30.2)
52.7–53.3 (52.9)
29.2–32.2 (30.6)
5.2–6.5 (5.6)—
10.1–13.3 (11.4)
15.4–18.3 (16.7)
3.9–4.8 (4.4)—
8.8–9.8 (9.3)
14.9–17.8 (16.0)
18.8–21.1 (20.2)
20.1–21.5 (20.7)
8.2–11.5 (9.8)
18.1–33.2 (25.2)

Paratypes* (n = 5)
Philippines

Randall and Ferraris (1981)

Table 2. Counts and proportional measurements, as percentages of standard length, of specimens of Leptojulis lambdastigma, including type materials.

Matsunuma et al.: Two labrid fishes from Thailand and Malaysia

33

34

Mem. Fac. Fish. Kagoshima Univ., 59 (2010)

Color when fresh. Based on color photographs of fresh

similar size.

specimens (Fig. 2). Body and head pale pink, whitish

In their review of Leptojulis, Randall and Ferraris 3)

ventrally; yellow stripe on body side, its width similar todescribed L. lambdastigma as a new species on the basis ofiris diameter, from upper lip, through orbit, to caudal-fin

eight specimens from the Philippines. Randall 4) subsequently

base; its lower edge with four to six (somewhat indistinct)

provided a second revision of Leptojulis, recognizing five

narrow vertical yellow bars; an irregular black spot on andvalid species in the genus. Although Shen 6) had reported L.

below lateral stripe above pectoral fin (indistinct due to poor

lambdastigma from Taiwan, it was regarded by Randall 4) as acondition); a large, posteriorly-pointed V-shaped black marknew species, L. urostigma. Leptojulis lambdastigma has been

middorsally on nape, its sides broader anteriorly, with shortpreviously recorded from Taiwan and the Philippines 3, 4, 8, 9).

white extensions anteriorly and posteriorly; a light yellow

The present specimens represent the first records of the

stripe extending posteriorly on lower part of head from mouth

species from Malaysian and Thai waters, and suggest a wider

corner and continuing as a zigzag band along body at level of

distribution in the South China Sea (Fig. 3). Off Terengganu,

pectoral-fin base; brownish-yellow stripe along dorsal-fin base

Malaysia specimens of L. lambdastigma were captured byfrom below side of V-shaped mark. Dorsal fin pale orange;

bottom trawl from offshore sandy bottoms.

upper half of soft-rayed portion of fin pale blue, with a broad
pale yellow band submarginally; lower portion of dorsal fin

Acknowledgmentswith a row of yellow blotches with a pale blue margin on
membranes anteriorly, forming a zigzag stripe posteriorly.

We greatly appreciate the kind support of M. S. Noor

Caudal fin white, pale blue distally, blackish marginally,

Azhar (formerly Institute of Oceanography, UMT) and P.

numerous scattered yellow spots with translucent margin.

Musikasinthorn (Kasetsart University, Bangkok) during the

Pectoral and pelvic fins translucent. Anal fin pale orange,

surveys in Malaysia and Thailand, respectively. The firstbroadly dusky yellow distally, with a thin light blue margin;

author is especially grateful to the family of the second authora row of yellow spots along base, one between each pair ofand all staff of the Institute of Oceanography (UMT), andadjacent fin rays; two longitudinal yellow line (somewhat

P. Sreesamran, S. Arbsuwan and S. Kulabtong (Kasetsart

indistinct), first on middle of fin forming spots posteriorly,

University) for their generous assistance during his stay

second on submarginally.

at those institutions. We also thank J. Williams (USNM)

Color of preserved specimens similar to fresh, but body afor the opportunity to examine comparative materials, Y.
Takata (National Museum of Nature and Science, Tokyo) for

little browner; red, yellow and blue coloration lost.
Remarks. The present specimens from the Gulf of Thailand

providing literature, T. Hashimoto (KAUM) for X-rays, M.

and the southern South China Sea were identified as Leptojulis

Meguro (KAUM) for collection of Malaysian specimens, andlambdastigma, following the diagnostic characters of that

G. Hardy (Ngunguru, New Zealand) for valuable comments on

3)

4)

and Randall : 27

the manuscript. Lastly, we thank Y. Haraguchi, M. Takayama

lateral line scales; 12 dorsal and anal fins soft rays; pectoraland other volunteers of KAUM for their curatorial assistance.

fin length 1.45–1.53 in head length, and a large V-shapedThis study was supported in part by “International Training

black mark medially on nape.

Program to Protect Diversity of Bioresources in the Tropical

species given by Randall and Ferraris

Small variations in some measurements were recognized

Area” in Kagoshima University, from the Japan Society for

between the present specimens and the original description of

the Promotion of Science (Tokyo, Japan) and grants awarded

the species (see Table 2): e.g., higher body depth mean 28.4

to the first author by the Fujiwara Natural History Foundation(range 27.0–29.7) %SL [vs. 26.4 (25.6–27.1)], longer preanal-(Tokyo, Japan).

fin length 55.2 (52.8–57.9) %SL [vs. 52.9 (52.7–53.3)],
shorter longest anal-fin soft ray 14.9 (14.0–16.2) %SL [vs.
16.0 (14.9–17.8)] and shorter pelvic-fin length 20.5 (18.3–
22.0) %SL [vs. 25.2 (18.1–33.2)]. These minor differences
are treated here as intraspecific variations because the originaldescription of the species was based on only six specimens ofMatsunuma et al.: Two labrid fishes from Thailand and Malaysia

References
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Indo-Pacific labrid fish genus Leptojulis with descriptions of two
new species. Rev. Fr. Aquariol., 8 (3): 89–96.
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35