Rasbora maninjau

description

Description. General appearance shown in Figure 2 C. Morphometric and meristic data given in Table 2. Dorsohypural distance equal to distance from dorsal-fin origin to nostril. Limit between head and trunk distinct in lateral view. Cephalic tubercles present on males. No female specimen examined. Tubercles relatively small, distributed over most of head surface, extending onto nape region as far as second predorsal scale and to several scales on anteroventral region of body. Lateral line complete (all scales perforated; 26 – 27 + 3 – 4). Dorsal-fin origin situated over 13 th lateral-line scale. Tip of adpressed pectoral fin barely reaching vertical through pelvic-fin insertion. Pelvic fin inserted below 12 th lateral-line scale and distinctly anterior to vertical through dorsal-fin origin. Tip of adpressed pelvic fin barely reaching vertical through anal opening. Anal-fin origin located below 18 th lateral-line scale. Rasbora maninjau Rasbora bindumatoga n = 7 n = 22 Range Mean ± SD Range Mean ± SD Standard length (mm) 57.3 – 82.7 68.4 ± 9.0 23.3 – 72.0 48.6 ± 12.5 Percentage of standard length Total length 130 – 136.3 134.5 ± 2.1 137.1 – 141.9 139.0 ± 1.3 Head length 24.3 – 26.0 2

Four new species of Rasbora of the Sumatrana group (Teleostei: Cyprinidae) from northern Sumatra, Indonesia

diagnosis

Diagnosis. Rasbora maninjau is distinguished from congeners by the combination of the following characters: the black midlateral stripe extending from the midhumeral region with a relatively uniform width and lacking the subdorsal blotch; the prominent acutely triangular basicaudal blotch; and the oval supra-anal pigmentation. Rasbora maninjau is further distinguished from the three other species of the Sumatrana group in northern Sumatra (Rasbora arundinata, R. haru, and R. bindumatoga) in having: 26 – 27 + 3 – 4 lateral-line scales (vs. 24 – 25 + 4; Table 2); 13 gill rakers on the first gill arch (vs. 10 – 12); 34 vertebrae (vs. 32 – 33); a relatively narrow body with a mean of 24.1 % SL (vs. 26.3 – 29.7 %); and a relatively narrow caudal peduncle with a mean of 11.9 % SL (vs. 13.9 – 14.9 %). Rasbora maninjau can be distinguished further from its congeners by the combination of all the following characters listed in the description section of this species.

Four new species of Rasbora of the Sumatrana group (Teleostei: Cyprinidae) from northern Sumatra, Indonesia

etymology

Etymology. The specific name, maninjau, a noun in apposition, refers to the name of the type locality, Lake Maninjau.

Four new species of Rasbora of the Sumatrana group (Teleostei: Cyprinidae) from northern Sumatra, Indonesia

materials_examined

Holotype. MZB 17890, 66.9 mm SL, Indonesia, Province of Sumatera Barat (West Sumatra), Kabupaten Agam, Kecamatan Tanjung Raya, by Hotel Danau Maninjau, 6 August 2006. Paratypes. Same data as holotype: MZB 21120, 1, 57.0 mm SL; USNM 406859, 1 (CS), 58.8 mm SL. Non-types. ZMA 102.400, 8, 31.3 – 66.0 mm SL, Meer van Manindjau, M. Weber, 1888.

Four new species of Rasbora of the Sumatrana group (Teleostei: Cyprinidae) from northern Sumatra, Indonesia