Aegosoma katsurai (Komiya, 2000)

The species was described based on holotype that collected from North Vietnam, recently they also found in Southern mountain forest of Vietnam and Laos as well. In publication by Do, 2015 of the genus, author proposed the species related to A. curnecornis from Myanmar because similar in structure of antenna. Evolution of two species of the group were proposed independent in Indochina area where separated from fauna of Indonesia-Malaysia lands.
They are medium size insects, male and female quite similar in shape. Southern individuals somehow larger than species found in North Vietnam.

Aegosoma katsurai (Komiya, 2000), male

Aegosoma xentoc Do & Drumont, 2014

In the entomological survey to South Vietnam, we found a new species of Aegosoma (Prioninae, Cerambycidae) from Lam Dong Province. The species was found in pristine forests with elevation about more than 1200m. Specimens were collected in 2013 and the description was published in 2014 based on both males and females.

The species is typical with long antenna and red brown in color, costae of elytra are visible clearly. It is medium large prionid beetle and difference from any known Aegosoma, it also not belong to any known group of the genus. Name of the species means "long horn beetle"  in Vietnamese.

Male of Aegosoma xentoc, figure made by Cuong Do from holotype