Gani, Abdul and Suhendra, Novian and Herder, Fabian and Schwarzer, Julia and Mohring, Jan and Montenegro, Javier and Herjayanto, Muh and Mokodongan, Daniel F (2022) A new endemic species of pelvic-brooding ricefish (Beloniformes: Adrianichthyidae: Oryzias) from Lake Kalimpa'a, Sulawesi, Indonesia. A new endemic species of pelvic-brooding ricefish (Beloniformes: Adrianichthyidae: Oryzias) from Lake Kalimpa'a, Sulawesi, Indonesia, 71 (1). pp. 77-85. ISSN 2190-7307

Text 2022, Gani et al. A new endemic species of pelvic-brooding ricefish (Beloniformes; Adrianichthyidae; Oryzias) from Lake Kalimpa'a, Sulawesi, Indonesia (jurnal).pdf Download (3MB)

Abstract

Oryzias kalimpaaensis sp. nov. is a new species of the genus Oryzias Jordan & Snyder, 1906, endemic to Lake Kalimpa’a in Lore Lindu National Park, Central Sulawesi, Indonesia. The species is a pelvic-brooder, a non-monophyletic group of ricefishes in which females carry an egg cluster until hatching. Pelvic-brooding is known from only a few taxa, and the new species reported here is only the fifth pelvic-brooding species known so far. Oryzias kalimpaaensis sp. nov. differs from all others Oryzias species by the following combination of characters: 61–67 scales in lateral line, 11–13 dorsal-fin rays, 11–13 pectoral-fin rays, body depth 16.0–22.2% SL, and length of head 30.1–33.7% SL. It is distinguished from all species of the genus Adrianichthys Weber 1913, by its small size (max. 52.8 mm SL). A molecular phylogeny based on mitochondrial ND2 sequences supports the distinctiveness of O. kalimpaaensis sp. nov. Oryzias kalimpaaensis sp. nov. is closely related to pelvic-brooding O. eversi Herder, Hadiaty & Nolte 2012 endemic to Tilanga Pond in Tana Toraja, and to the two species of Lake Lindu in Central Sulawesi, O. sarasinorum (Popta 1905) and O. bonneorum Parenti 2008. As Lake Kalimpa’a is a popular destination for nature tourism, anthropogenic pressure is high. The presence of invasive fish species in the lake and parasites on collected specimens support thiss assumption.

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