A New Species of Rainbowfish (Melanotaeniidae), from western New Guinea (West Papua Province, Indonesia)
A new species of rainbowfish, Melanotaenia mairasi, is described on the basis of 22 specimens, 12.1–54.2 mm SL, collected in November 2010 at Lake Furnusu in the Bird’s Neck region of Kaimana Regency, West Papua Province, Indonesia. It is closely allied to M. ogilbyi from central-southern New Guinea (southeastern Papua Province, Indonesia). The two species share similar meristic and morphological features as well as general colour patterns. They differ most notably in the number of gill rakers on the lower limb of the first gill arch, 15–17 for M. mairasi and 10 or 11 for M. ogilbyi. The count for M. mairasi is the highest among the “maccullochi” group of species.
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