Abstract
Siamitoides carinatus gen. sp. n. is described, based on a male specimen collected on Sumatra. The new genus superficially resembles the Oriental Siamites in the shape of head, which in lateral view is subtriangular, with the highest site above the antennal fossae and the flat vertex gradually declining posterad up to the neck region. Among world Stenichnini, this peculiar shape of the head capsule can be found also in the Oriental Elacatophora, Nearctic Lophioderus, and the extinct Cretaceous Cenomaniola of Myanmar amber deposits. Morphological structures of the new genus are illustrated in detail, and an updated key to the Oriental genera of Stenichnini (excluding subtropical Chinese and Japanese taxa) is given.
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