Editorial Type:
Article Category: Research Article
 | 
Online Publication Date: 31 Oct 2014

A New Ricefish of the Genus Oryzias (Beloniformes, Adrianichthyidae) from Lake Tiu, Central Sulawesi, Indonesia

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Page Range: 561 – 567
DOI: 10.1643/CI-13-081
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We describe Oryzias soerotoi, a new species of ricefish, from Lake Tiu, Central Sulawesi, Indonesia. The new species is distinguished from all other species in the genus Oryzias in Sulawesi by combination of brilliant orange coloration in the dorsal and ventral margins of the caudal fins of adult males, 30–32 scales along the lateral midline, 9–10 pectoral-fin rays, head lengths of 21.9–24.9% SL, anal-fin base lengths of 23.7–29.7% SL, and maximum SL up to 32.1 mm. The orange margins of the caudal fins of males become more brilliant during courtship.

Kami mendiskripsi Oryzias soerotoi, satu jenis baru ikan padi dari Danau Tiu, Sulawesi Tengah, Indonesia. Jenis baru ini dengan mudah dapat dibedakan dari semua jenis anggota genus Oryzias di Sulawesi dengan adanya kombinasi warna jingga yang sangat mencolok di bagian atas dan bawah sirip ekor pada jantan dewasa, 30–32 jumlah sisik sepanjang garis sisi, 9–10 jumlah jari-jari sirip dada, ukuran kepala pendek 21.9–24.9% SL, panjang pada pangkal sirip anal 23.7–29.7% SL, dan maksimal SL mencapai 32.1 mm. Warna jingga di sirip ekor pada jantan menjadi lebih mencolok selama proses percumbuan.

Copyright: 2014 by the American Society of Ichthyologists and Herpetologists
Fig. 1.
Fig. 1.

Map of Sulawesi, with a star indicating the type locality of Oryzias soerotoi, new species.


Fig. 2.
Fig. 2.

Top: Oryzias soerotoi, new species, MZB 21377, holotype, male, 27.1 mm SL. Bottom: MZB 21378, paratype, female, 29.9 mm SL.


Fig. 3.
Fig. 3.

Live adult male (Top) and female (Bottom) of Oryzias soerotoi in the laboratory. (Photographs by N. Hashimoto).


Fig. 4.
Fig. 4.

Top: Live adult male of Oryzias soerotoi in breeding colors. Bottom: Displaying males. (Bottom: Photograph by N. Hashimoto).


Fig. 5.
Fig. 5.

Type locality of Oryzias soerotoi, Lake Tiu, District Petasia, Regency of Morowali, Sulawesi Tengah.


Contributor Notes

Associate Editor: D. Buth.

Received: 17 Jul 2013
Accepted: 21 May 2014
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