Herder & Chapuis, 2010
Oryzias hadiatyae, a new species of ricefish (Atherinomorpha: Beloniformes: Adrianichthyidae) endemic to Lake Masapi, Central Sulawesi, Indonesia.ABSTRACT.
A new species of ricefish is described from Lake Masapi, a small satellite lake of the Malili Lakes system in Central Sulawesi, Indonesia. Oryzias hadiatyae, new species, is known only from this single lake. It differs from all other adrianichthyids in Sulawesi in having a well marked concavity on the snout, a slender but relatively wide body with elongated snout and slightly upwardly directed mouth, pelvic fins with 5–6 fin rays and anal fin with 19–22 fin rays, both inserting relatively close to the rear end of the body, dorsal fin with 8–10 rays inserted above 10–12th anal fin ray, 28–30 vertebrae, only 27–31 lateral scales, dark brown blotches on the lateral body in adult males, and no blotches in females. This brings the number of ricefi sh species in Sulawesi to 16 (four Adrianichthys, 12 Oryzias), with four endemic lacustrine Oryzias in the Malili Lakes system. In addition, the riverine ricefish Oryzias celebensis, known so far only from Sulawesi’s southwestern arm and a single river in East Timor, is here reported for the first time from a drainage in Central Sulawesi.
F. Herder & S. Chapuis
Raffles Bulletin of Zoology, 58 (2): 269–280, 2010.