Rasbora arundinata

description

Description. General appearance shown in Fig. 2 A. Morphometric and meristic data given in Table 1. Dorsohypural distance equal to distance from dorsal-fin origin to area between vertical through anterior margin and posterior margin of eye. Limit between head and trunk indistinct in lateral view. Cephalic tubercles absent. Lateral line complete (all scales perforated; 24 – 26 + 3 – 5). Dorsal-fin origin 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 extending past anal opening almost to anal-fin origin; in larger specimens reaching anal-fin origin. Anal-fin origin below 18 th or 19 th lateralline scale. Coloration in alcohol. General body coloration in alcohol preservation shown in Fig. 2 A. Schematic lateral body pigmentation shown in Fig. 7 A. Lachrymal region superficially pigmented with scattered small melanophores more concentrated peripherally. Dusky gular pigmentation reaching posteriorly to vertical through rictus. Occipital region with two superficial lines and one

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

diagnosis

Diagnosis. Rasbora arundinata is distinguished from all congeners in having a unique black midlateral stripe overall forming a reed-leaf-like profile, which consists of: a subdorsal blotch that starts tapering anteriorly from the vertical through the dorsal-fin origin where its dorsal margin appears to be slightly crested, and the tapering extends further anteriorly reaching midhumeral region via a long pointed anterior tip; a midhumeral diffuse patch in which melanophores concentrate right below the subdorsal blotch and extends anteriorly in a somewhat diffuse fashion to reach the midhumeral region; and a posterior-portion stripe that terminates posteriorly at the area immediately dorsal to the anterior apex of the triangular basicaudal blotch. Rasbora arundinata 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, arundinata, an adjective from the Latin ‘ arundo ’ for reed, refers to the shape of the black midlateral stripe of the species appearing like a reed leaf.

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

materials_examined

Holotype. MZB 17881 (ex. USNM 390034), female, 74.5 mm SL, Indonesia, Sumatra, Province of Nanggroe Aceh Darussalam, Kabupaten Aceh Singkil: Road from Subulussalam to Singkil, Lae Petal River, 02 ° 31 ’ 76 ” N, 098 ° 02 ’ 64 ” E, 21 July 2006, D. N. Lumbantobing, D. Rudaya, and N. M. Ray. Paratypes. Indonesia, Sumatra: collected with holotype: MZB 17882 (ex. USNM 390034), 1, 67.8 mm SL; USNM 390034, 2, 64.5 and 68.5 mm SL. Province of Aceh: Kabupaten Gayo Lues: MZB 17885 (ex. USNM 390069), 1, 64.7 mm SL; USNM 390069, 1, 47.5 mm SL, Kampung Lintoh, a tributary of Tripa River, on the road from Takengon to Blangkejeren, 04 ° 02 ’ 06 ” N, 097 ° 20 ’ 33 ” E; D. N. Lumbantobing, R. K. Hadiaty, D. Rudaya, and N. M. Ray, 7 July 2006. Kabupaten Aceh Selatan: Kecamatan Kluet Timur: D. N. Lumbantobing, D. Rudaya and N. M. Ray: 15 July 2006: MZB 17884 (ex. USNM 390053), 8, 42.7 – 86 mm SL; USNM 390053, 7 (1 CS), 45.2 – 85.2 mm SL, Lawe Mokap River, tributary of Kluet River, 03 ° 09 ’ 96 ’’ N, 097 ° 23 ’ 90 ’’ E; ZRC 53196 (ex. USNM 390053), 3, 49.7 – 76.0 mm SL; USNM 401462, 4, 43.0 – 68.2 mm SL, Hari Pinem River (a tributary of Kluet River), 03 ° 09 ’ 62 N, 097 ° 24 ’ 89 ” E; ZRC 53197, 2, 37

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