Rasbora sp. 2

Aqmal-Naser, Mohamad, Ali, Norsyafira Anis, Azmi, Nur Ummiliani, Fahmi-Ahmad, Muhammad, Rizal, Syed Ahmad & Ahmad, Amirrudin B., 2023, Freshwater fishes (Actinopterygii) of Kenyir Reservoir, Peninsular Malaysia: Updated checklist, taxonomic concerns and alien species, Biodiversity Data Journal 11, pp. 100337-100337 : 100337

Rasbora sp. 2

Materials

Type status: Other material. Occurrence : catalogNumber: UMTZC7648 ; Location : locality: Ikan River , Papan River ; Event: samplingProtocol: Electrofishing; year: 2018, 2019, 2020

Native status

Native species.

Conservation status

NE

Notes

New record to Kenyir Reservoir. There were two forms of Rasbora sp. collected in this study. A more common form has an incomplete mid-lateral stripe (not reaching gill opening) which is different from the real Rasbora paviana (Fig. 15 A). It has the mid-lateral line that begins to diffuse at the mid-section of the body, known as a mid-humeral diffuse patch (MDP) ( Lumbantobing 2014) (Fig. 15 B). One specimen displayed a unique set of characteristics: high and pointed dorsal fin (vs. rounded), long and, when adpressed, reaching beyond the base of the anal fin (vs. only half); pectoral fin long and overlapping pelvic fin (vs. not reaching the pelvic fin); pelvic fin elongated and reaching half of the dorsal fin base (vs. not overlapping) and possessing diamond-shape caudle peduncle blotch (vs. longitudinally elongated diamond) (Fig. 15 C). Due to a lack of specimens, a detailed comparison was not made at this moment.

Figures

Figure 15. Rasbora paviana (A) and Rasbora sp. 2 (B & C). Mid-humeral diffuse patch (MDP).