Abstract
BackgroundThe freshwater shrimp, Australatyaobscura Han & Klotz, has been known only from Taiwan and Panay Island, Philippines.New informationAn adult A.obscura was collected from a river on Ishigaki Island, Ryukyu Islands, Japan. This is the first record of the species in Japan and the northernmost specimen-supported record to date. The species is suggested as having been transported northwards by the Kuroshio Current.
Highlights
The Ryukyu Islands are located southwest of the Japanese mainland and are the northernmost region with a tropical rainforest climate
The shrimp was caught by hand net from under a stone in a fast-flowing stream of the Fukido River, Ishigaki Island, Ryukyu Islands, Japan on 11 March 2018
The specimen was deposited in the Kanagawa Prefectural Museum of Natural History
Summary
The freshwater shrimp, Australatya obscura Han & Klotz, has been known only from Taiwan and Panay Island, Philippines. An adult A. obscura was collected from a river on Ishigaki Island, Ryukyu Islands, Japan. This is the first record of the species in Japan and the northernmost specimen-supported record to date. The species is suggested as having been transported northwards by the Kuroshio Current
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