Diplodus omanensis Bauchot & Bianchi, 1984

Amir, Shabir Ali, Tanaka, Fumiya, Siddiqui, Pirzada Jamal & Iwatsuki, Yukio, 2013, Integrating multiple lines of evidence to better understand the evolutionary divergence of humpback dolphins along their entire distribution range: a new dolphin species in Australian waters?, Cybium 37 (3), pp. 220-222 : 220-222

Diplodus omanensis Bauchot & Bianchi, 1984

English Name: Oman Porgy

( Fig. 1A ; Tab. I)

Diplodus cervinus omanensis Bauchot & Bianchi, 1984: 103 ,

(1) Zoological Sciences Division, Pakistan Museum of Natural History, Islamabad, Pakistan. (2) Interdisciplinary Graduate School of Agriculture and Engineering, University of Miyazaki, 1-1 Gakuen-kibanadai-nishi, Miyazaki

889-2192, Japan. [[e-mail]] (3) Centre of Excellence in Marine Biology, University of Karachi, Karachi 75270, Pakistan. [[e-mail]] (4) Department of Marine Biology & Environmental Sciences, Faculty of Agriculture, University of Miyazaki, 1-1 Gakuen-kibanadainishi, Miyazaki 889-2192, Japan. [[e-mail]] * Corresponding author [[e-mail]]

fig. A (Kuria Muria Bay [ Oman], Arabian Sea); Randall, 1995: 225, fig. 585 ( Oman); Manilo and Bogorodsky, 2003: S109 (Arabian Sea).

Material examined

A specimen, CEMB-P 2012-00077 (formerly MUFS 39722), 310 mm in SL, purchased at the West Wharf Fish Harbour, Kara-

CEMB-P 2012-00077 CEMB-P 2012-00078 (formerly MUFS 39722) (formerly MUFS 39720)

n = 1 n = 1

Counts Dorsal-fin rays XI, 10 XII, 10 Anal-fin rays III, 10 III, 9 Pectoral-fin rays 15 15 Pored lateral-line scales 50 59 Scale rows between fifth (ninth) dorsal-fin spine base and lateral line 8 ½ (8) 6 ½ (5) Scale rows above/below lateral line 9 ½ / 17 ½ 6 ½ / 16 ½ Scale rows on cheek 5 7 Gill rakers 5 + 1 + 8 = 14 6 + 1 + 9 = 16 Standard length (mm) 310 183 Proportions (% SL) Body depth 37.2 42.4 Body depth at first anal fin spine origin 32.8 Head length 37.5 33.0 Posteriormost jaw 15.8 10.7 Body width at pectoral fin base 15.8 18.0 Snout length 13.6 12.2 Orbit diameter 8.5 9.8 Dermal eye opening 7.0 8.3 Interorbital width 11.6 8.8 Upper jaw length 11.0 12.0 Caudal peduncle depth 15.3 9.2 Caudal peduncle length 16.8 17.4 Predorsal length 49.0 40.7 Preanal length 65.8 61.2 Prepelvic length 42.9 38.2 Dorsal-fin base 39.0 51.4 Anal-fin base 18.7 26.8 Caudal-fin length 32.9 29.0 Pelvic-fin spine 13.9 15.8 First pelvic-fin ray 22.6 22.9 Longest pectoral-fin ray 34.5 36.7 First dorsal-fin spine 4.5 10.7 Second dorsal-fin spine 9.5 13.7 Third dorsal-fin spine 12.0 17.0 Fourth dorsal-fin spine 14.5 15.5 Fifth dorsal-fin spine 13.2 15.7 Sixth dorsal-fin spine 12.2 14.7 Last dorsal-fin spine 9.0 9.0 Longest dorsal-fin ray 9.5 9.9 First anal-fin spine 4.8 4.8 Second anal-fin spine 10.3 8.9 Third anal-fin spine 9.7 9.3 First anal-fin ray 10.7 9.2 Suborbital depth 8.5 6.3

chi (presumably collected from western Pakistani rocky shore and sandy area according to the seller), 26 May 2011.

Description

Counts and proportional measurements of Diplodus omanensis are shown in table I. Head and body compressed with dorsal profile of head moderately steep; scale rows on cheek; mouth small and horizontal, the maxilla reaching to below anterior margin of eyes and completely hidden under suborbitals when mouth closed; six pairs of projecting incisor teeth in upper jaw and four pairs in lower jaw; posterior part of jaw with three rows of small molars; first dorsal spine is smallest while fourth and fifth one is usually longest; second and third anal spines subequal; caudal fin forked; upper lobe of caudal fin is slightly longer than lower one; pectoral fins reaching to anal spine

Colour in fresh specimen ( Fig. 1A ): five broad black bars on head and body; one on head through eyes and four on rest (first and second indistinctly bifurcated ventrally); two indistinct short narrow black bars ventrally in first silver interspace on body and one indistinct ventrally after second; snout partly yellow; margins of fins are also partly yellow and blackish.

Figures

Figure 1. - A: Diplodus omanensis, 310 mm SL; B: Pagellus affinis, 183 mm SL. Both species were purchased at the West Wharf Fish Harbour, Karachi, Pakistan, 26 May 2012.