Rasbora bindumatoga

description

Description. General appearance shown in Figure 2 D. Morphometric and meristic data given in Table 2. Dorsohypural distance equal to distance from dorsal-fin origin to area between anterior portion of snout and posterior margin of pupil. Limit between head and trunk indistinct in lateral view, but more visible in smaller specimens (~ 40 mm SL). Cephalic tubercles present on males, relatively small and few in number. Tubercles distributed on dorsal surface of head from snout to occiput. Lateral line complete (all scales perforated; 24 – 26 + 3 – 4). Dorsal-fin profile blunt with first branched ray being longest dorsal-fin ray. Dorsal-fin origin situated over 12 th lateral-line scale. Tip of adpressed pectoral fin nearly reaching vertical through pelvic-fin insertion. Pelvic fin inserted below 11 th lateral-line scale and distinctly anterior to vertical through dorsal-fin origin. Tip of adpressed pelvic fin extending past anus and in some specimens reaching to anal-fin origin. Anal-fin origin located below 17 th lateral-line scale. Coloration in alcohol. General body coloration in alcohol in alcohol preservation shown in Fig. 2 D. Schematic lateral body pigmentation shown in Fig. 10

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

diagnosis

Diagnosis. Rasbora bindumatoga is distinguished from congeners by the following combination of characters: the black midlateral stripe is only represented by a rectangular subdorsal blotch without a midhumeral diffuse patch and the posterior-portion stripe, the absence of supra-anal pigmentation, and the basicaudal blotch appearing somewhat oval and lacking the basicaudal triangular patch. Rasbora bindumatoga 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 species epithet, bindumatoga, a noun in apposition, is derived from the term ‘ Bindu Matoga’ in the two native languages of northern Sumatra, Mandailing and Toba, which are widely spoken throughout the distribution range of the species. By the local Mandailing and Toba people, the term ‘ Bindu Matoga’ is commonly used as the name of a unique traditional ornament that has a rectangle outline. The epithet, thus, refers to the rectangular shape of the black subdorsal blotch of the species.

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

materials_examined

Holotype. MZB 17889, female, 47.1 mm SL, Indonesia, Sumatra, Province of Sumatera Utara (North Sumatra), Kabupaten Tapanuli Selatan, Batang Angkola River, 01 ° 09 ’ 90 ” N, 099 ° 24 ’ 83 ” E, D. N. Lumbantobing and D. Rudaya, 4 August 2006. Paratypes. All from Indonesia: collected with holotype: MZB 21117, 7, 23.3 – 60.6 mm SL; USNM 404351, 7 (3 CS), 41.5 – 49.1 mm SL; ZRC 53199, 4, 25.2 – 46.6 mm SL. Sumatra: Province of Sumatera Utara (North Sumatra): CMK 4528, 16, 21.0 – 67.6 mm SL, road from Porsea to Pulau Raya, 33 km before Pulau Raya, Bianco and M. Kottelat, 27 November. 1984; MZB 21118, 1, 57.6 mm SL, Kabupaten Tapanuli Utara, Aek Dahasan, on the road from Onanhasang to Sipirok, 01 ° 52 ’ 25 ” N, 099 ° 03 ’ 64 ” E, D. N. Lumbantobing, D. Rudaya and N. M. Ray, 26 July 2006; MZB 21119, 1, 72.0 mm SL; Kabupaten Toba Samosir, Aek Silang River (a tributary draining to Lake Toba), PLTA Pandan, 02 ° 18 ’ 50 ” N, 098 ° 44 ’ 51 ” E, D. N. Lumbantobing, D. Rudaya and N. M. Ray, 31 July 2006; USNM 390346, 1, 29.5 mm SL, Kabupaten Humbang-Hasundutan, near Doloksanggul, upstream of Aek Sibundung River, 02 º 15.90 ’ N / 98 º 43.75 ’ E, D. N. Lumbantobing, D. Rudaya and N. M. Ray, 31 July

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