Damita de Bangladesh

description

Description. Body ovate, depth 1.68 – 1.88 (1.88) in SL and compressed, width 2.56 – 3.08 (2.56) in body depth; head length 2.91 – 3.09 (3.08) in SL; dorsal profile of head evenly rounded from dorsal-fin origin to snout; snout length 4.17 – 4.60 (4.17) in head length (HL); interorbital width 2.56 – 3.29 (3.13) in HL; eye diameter 3.13 – 3.29 (3.13) in HL; caudal-peduncle length 3.57 – 3.83 (3.57) in HL (Table 2). Mouth terminal, small, oblique, and superior; forming an angle of about 30 ° to horizontal axis of head and body; maxilla extending to anterior end of pupil; lower jaw longer than upper jaw, jaw gape 3.13 – 3.29 (3.13) in HL. Teeth incisiform to conical, uniserial posteriorly, becoming biserial anteriorly. Tongue triangular with rounded tip and placed far back in mouth. Gill rakers cylindrical and long, longest on lower limb near angle and about two-thirds length of longest gill filament. Nostril rounded, level with lower edge of pupil and about midway between anterior edge of eye and upper lip. Opercle ending posteriorly with flat spine, tip obtuse, just projecting from underneath a large scale; preopercle margin usually with distinct serrations; the posterior margin of p

Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin’s Island, Bangladesh

description

Local common name: Pettoli Figures 2, 3 Zoobank No. urn: lsid: zoobank. org: act: F 8892626 - 8 F 5 E- 413 A- 9613 - F 031 E 6934 CCA

Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin’s Island, Bangladesh

diagnosis

Diagnosis. Dorsal-fin elements XIV, 13; anal-fin elements II, 14; pectoral-fin rays 19; lateral-line scales 18 – 19 (18); total gill rakers on first arch 17 – 19 (19); body depth 1.68 – 1.88 (1.88) in SL. Lateral line single and interrupted. Body color olive to dark brown in freshly caught condition; premaxilla dark brown; iris of adult mostly yellow with a narrow bronze eye ring around pupil. Pectoral-fin base without black spot. Margin of suborbital and preopercle with distinct serrations. A prominent notch present between preorbital and suborbital. Snout scaly to about level of nostrils or beyond, scales absent on preorbital and suborbital (Fig. 4). Axillary scale present above base of pelvic fin. Single scale row on preopercle behind the eye and 3 rows of scales present on preopercle below the eye. Circumpeduncular scales 14. Meristic measurements are given in Table 1.

Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin’s Island, Bangladesh

discussion

Remarks. Most Pomacentrus species possess XIII dorsal-fin spines, but 20 species have XIV dorsal-fin spines, of which 13 species occur in the Indian Ocean (Allen & Wright, 2003; Frable & Tea, 2019; Froese & Pauly, 2019). Color patterns are very distinctive for most species of Pomacentrus, and color is generally considered a reliable means for separating them (Allen & Wright, 2003). Pomacentrus bangladeshius occurs in the northern Bay of Bengal of the Indian Ocean and displays XIV dorsal-fin spines. The measurements and coloration of P. bangladeshius are different from all of the other Pomacentrus species found in the Indian Ocean. Pomacentrus bangladeshius is readily separated from P. aquilus Allen & Randall, 1980 in having deeper body (1.68 – 1.88 vs. 1.9 – 2.0 in SL), fewer gill rakers on first arch (17 – 19 vs. 19 – 22), more lateral-line scales (18 – 19 vs. 16 – 18), pectoral fin without spot vs. a black spot at upper base of pectoral fin, and, moreover, P. aquilus is restricted to the western Indian Ocean (Allen & Randall, 1980). Further, P. bangladeshius is different from P. arabicus Allen, 1991 in having fewer dorsal-fin soft rays (13 vs. 14 – 15), more pectoral-fin rays (19

Pomacentrus bangladeshius, a new species of damselfish (Perciformes, Pomacentridae) from Saint Martin’s Island, Bangladesh