What was discovered on Iriomote Island?

A new subspecies of the snail *Oncomelania hupensis* was discovered on Iriomote Island, Okinawa Prefecture.

What is the scientific name of the new subspecies?

The new subspecies has been officially named *Oncomelania hupensis iriomotensis*.

Is there a risk of Schistosomiasis Japonica infection from this new subspecies?

Based on infection experiments and environmental DNA analysis, no evidence indicating a risk of Schistosomiasis Japonica infection from this new subspecies has been found.

What is the conservation status of this new subspecies?

The distribution of the new subspecies is extremely limited, qualifying it as Critically Endangered IA under the Ministry of the Environment's Red List criteria, indicating a high risk of extinction and a strong need for conservation measures.

Where was the new subspecies found?

It was discovered at a waterfall in the mountains of Iriomote Island, Okinawa Prefecture, which is a different habitat from other *Oncomelania* species found in lowlands.

Which institutions were involved in this research?

The research was a collaboration between Okayama University, the University of Tokyo, and Dokkyo Medical University.

Where were the research findings published?

The findings were published in the American malacological journal "*Malacologia*".

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【冈山大学】在日本西表岛发现日本住血吸虫的中间宿主「宫入氏氏螺」新亚种，无感染日本住血吸虫之虞！

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常見問題

Q: What was discovered on Iriomote Island?: A: A new subspecies of the snail *Oncomelania hupensis* was discovered on Iriomote Island, Okinawa Prefecture.
Q: What is the scientific name of the new subspecies?: A: The new subspecies has been officially named *Oncomelania hupensis iriomotensis*.
Q: Is there a risk of Schistosomiasis Japonica infection from this new subspecies?: A: Based on infection experiments and environmental DNA analysis, no evidence indicating a risk of Schistosomiasis Japonica infection from this new subspecies has been found.
Q: What is the conservation status of this new subspecies?: A: The distribution of the new subspecies is extremely limited, qualifying it as Critically Endangered IA under the Ministry of the Environment's Red List criteria, indicating a high risk of extinction and a strong need for conservation measures.
Q: Where was the new subspecies found?: A: It was discovered at a waterfall in the mountains of Iriomote Island, Okinawa Prefecture, which is a different habitat from other *Oncomelania* species found in lowlands.
Q: Which institutions were involved in this research?: A: The research was a collaboration between Okayama University, the University of Tokyo, and Dokkyo Medical University.
Q: Where were the research findings published?: A: The findings were published in the American malacological journal "*Malacologia*".