Benutzer:Haplochromis/Cypriniformes
| Puntius rubrotinctus | ||||||||||||
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Puntius rubrotinctus | ||||||||||||
| Systematik | ||||||||||||
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| Wissenschaftlicher Name | ||||||||||||
| Puntius rubrotinctus | ||||||||||||
| (Jerdon, 1849) |
Puntius rubrotinctus ist ein Süßwasserfisch aus der Familie der Karpfenfische (Cyprinidae). Die Art wurde 1849 durch den britischer Mediziner, Zoologe und Botaniker Thomas Caverhill Jerdon als Systomus rubrotinctus beschrieben, galt später lange Zeit als Synonym der Dreibandbarbe (Puntius arulius) und wurde erst 2011 wieder als Puntius rubrotinctus revalidiert.
Sie kommt in Südindien im Kaveri und seinen Nebenflüssen in den Bundesstaaten Kerala, Karnataka und Tamil Nadu vor.
Merkmale
Systomus rubrotinctus Jerdon has long been considered a synonym of Puntius arulius. Examination of ‘P. arulius’ collected from various parts of the Western Ghats revealed the presence of two distinct species: and the fish considered by Day as ‘P. arulius’ from Wayanad is in fact P. rubrotinctus. Based on the colour pattern, morphometrics and meristics, P. rubrotinctus is retrieved from the synonymy of P. arulius and redescribed. Puntius rubrotinctus can be distinguished from P. arulius by the unique colour pattern consisting of three well-defined black blotches on the body, two scales high and three scales wide, as distinct from the diffused blotches in P. arulius. It further differs from P. arulius in having a shorter dorsal-to-hypural distance (49.8–54.6 % SL, vs. 57.3–57.6 % SL), a smaller interorbital width (28.4–35.6 % HL, vs. 39.1–39.7 % HL) and a higher number of gill rakers (10–11 in the first gill arch, vs. 8).
The results revalidate the identity of the Puntius filamentosus-Artengruppe of previous authors drawing attention to the presence of intermediate forms among this group, in which natural hybrids appear to occur, of which P. exclamatio may be one.
Body elongate, laterally compressed; dorsal contour ascending, indented at nape, profile of back convex anterior to dorsal-fin origin, tapering gradually thereafter; ventral profile equally convex anterior to pelvic-fin origin, curving gently up to anal-fin origin; caudal peduncle deep, its depth a little less than its length.
Die Kopflänge macht 28,3 bis 32,8 % der Standardlänge aus.
eye large, its diameter 29.3–35.8 % HL, positioned nearer to snout than to opercular margin; interorbital wide, almost equal to eye diameter; snout length less than eye diameter; males with a few minute tubercles on snout, extending up to infra-orbital region. Mouth terminal; lips thick, maxilla extending almost to anterior border of eye. A pair of short maxillary barbels present, 7.3–13.4 % HL. Well-defied gill rakers, 2(6), 3(6) + 7(2), 8(10) on the first gill arch.
Der Beginn der Rückenflosse liegt näher zur Schnauzenspitze als zur Schwanzflossenbasis, die Bauchflossen beginnen nur wenig dahinter. Brust- und Bauchflossen sind kurz und reichen nicht bis zum Beginn der Afterflosse. Die Schwanzflosse ist tief gegabelt, ihre Enden sind zugespitzt.
- Flossenformel: Dorsale: iii/8½; Anale: iii/5½; Pectorale: 13-14; Ventrale: i/8, Caudale: 1+9+8+1.
- Schuppenformel: mLR 23-27.
7(4)-8(8) predorsal scales. Lateral line complete, with 20 (1), 21(10) or 22(1) scales on body including one scale on caudal-fin base. Transverse scales from dorsalfin origin to pelvic-fin origin ½4+1+2. An axillary pelvic scale present. Eighteen circumferential scales (counted as number of scales around greatest depth of body beginning from first scale anterior to dorsal-fin origin), 12 circumpeduncular scales.
Literatur
- J.D. Marcus Knight, K. Rema Devi & Vidyadhar Atkore: Systematic status of Systomus rubrotinctus Jerdon (Teleostei: Cyprinidae) with notes on the Puntius arulius group of fishes. Journal of Threatened Taxa (2011): 1686-1693. PDF
Weblinks
- Haplochromis/Cypriniformes auf Fishbase.org (englisch)