Rhaetulus crenatus Weswood, 1871 was recorded from Vietnam with two subspecies: Rhaetulus crenatus kawanoi Maes, 1996 from North Vietnam; and Rhaetulus crenatus tsutsuii Fujita, 2010 from South and Center of Vietnam.
Rhaetulus crenatus kawanoi Maes, 1996 from North Vietnam
Rhaetulus crenatus tsutsuii Fujita, 2010 from South and Center of Vietnam
Dorcus magdeleinae Lacroix, 1972 were know with 4 subspecies and 2 of them were recorded from Vietnam: Dorcus magdeleinaemagdeleinae Lacroix, 1972 was confirmed from Sa Pa, Lao Cai, North Vietnam and Dorcus magdeleinaelieni Maeda, 2012 from South Center of Vietnam. However the number of subspecies still unclear because of a long border with China, some Chinese subspecies maybe can be found also from Vietnam.
Aegus taurus Boileau, 1899 was known as Aegus beauchenei Boileau, 1902, however recently the A. beauchenei was treated as synonym of A. taurus. The species was found in North Vietnam and South China. Type specimens were collected from Bao Lac and Dong Van, North Vietnam (Tonkin).
Odontolabis siva (Hope & Westwood, 1845) is shinning black species of the genus, there 2 forms of male: large male with long, strange mandibles and small male with short mandibles.
They found in high land mountain of North, Center and South Vietnam.