Marumba saishiuana is a species of moth of the family Sphingidae.
Distribution It is known from south-eastern China, southern South Korea, Japan (Tsushima Island), northern Thailand, northern Vietnam and Taiwan.
Description The wingspan is 75–85 mm. Adults are on wing from May to July in Korea.
Subspecies Marumba saishiuana saishiuana (south-eastern China, southern South Korea, Japan (Tsushima Island), northern Thailand and northern Vietnam) Marumba saishiuana formosana Matsumura, 1927 (Taiwan)
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