This species is a rare Lucanus that found from North Vietnam, it very close to Lucanus fujitai that was described by Katsura and his wife (Doan Lan Giang) in 2002.
Males of Lucanus gravidus Saito et Zilioli, 2018 (the photo from holotype in orginal description).
The species mainly difference from its close species (L. fujitai) with stronger mandibles, larger and more pronounced posterolateral corners of the cephalic lobes. And the aedaegus with longer flagellum, shorter and thinner median lobe and longer apically curved parameres.
The species was described by Shinji Nagai in 1999 based on specimens that collected from South Vietnam. Not same to other species of the genus, the species is small size and about the size of species of Xylotrupes genus.
The male of the species distinguished with 2 horns on the pronotum, the horn of the head vary with bifid or point apex.
The type locality of the species is Lam Dong Province, South Center of Vietnam.
Male of Eupatorus endoi in difference point of views
A species of Geometridae family, in which most of the members are night flying moths, however this species is a day flying moth with colorful wings. They found from India to Japan and South East Asia. There are four subspecies that have been drescribed: Milionia zonea zonea (North East India, Myanmar to Vietnam), Milionia zonea nishiyamai (found in Leyte Island), Milionia zonea pryeri (found in Japan to Taiwan and Hainan China), Milionia zonea sharpei (found from Malaysia, Borneo and Sumatra area).
Milionia zonea zonea Moore, 1872 (Photographer: Tran Quoc Long - long.tranquoc@live.com - at Da Lat, Lam Dong Province, South Vietnam)
Milionia zonea zonea Moore, 1872 (Video clips by photographer: Tran Quoc Long - long.tranquoc@live.com - at Da Lat, Lam Dong Province, South Vietnam)
Rhaetulus crenatus Weswood, 1871 was recorded from Vietnam with two subspecies: Rhaetulus crenatus kawanoi Maes, 1996 from North Vietnam; and Rhaetulus crenatus tsutsuii Fujita, 2009 from South and Center of Vietnam.
Rhaetulus crenatus kawanoi Maes, 1996 from North Vietnam
Rhaetulus crenatus tsutsuii Fujita, 2009 from South and Center of Vietnam
Macrodorcas melliana (Kriesche, 1921) was found from North Vietnam and South China, it is beautiful species with red brownish hair on inner side of mandibles.
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.
Globitermes sulphureus is a colorful species of termite that found very common in South Center of Vietnam. The species also be found from South East Asia. They are characteristic with brighten yellow abdomen of solder members that bearing a pairs of strongly curved inn-ward mandibles. The name of the species maybe because of the abdomen color of the solder, yellow of sulfur.
Brighten yellow solder termite with strong inner curved mandibles, photographed by Cuong Do, 2016
The species also known as Nitrogen fixing species that can help the soil be rich, so besides the important role on Carbon cycle of the ecosystem, they also are one of a key species of Nitrogen cycle in tropical forests.
The nest of the species can easily recognized on the ground with size quite large, some time reach to 0.7m about the ground.
Under the cover layer of the nest, there is a strong wall system and making the "skeleton" of the nest, they look like coral skeleton structure. Photographed by Cuong Do.
Because the nest of termite is quite stable condition so there are many other species can be found, they live in side some part of their life time or whole life. It is a safe place (protected by solder), good and stable conditions (temperature and humidity).
A pupa of Lepidoptera found in side of the termite nest, photographed by Cuong Do
Myself and Globitermes sulphureus nest in Bidoup National Park, 2016, photo taken by Prf. Kashio
The nest can be found near the food source or far from the food source (dead tree), in the video clip above, the nest was made just next to a dead tree, by Cuong Do, 2016
The structure of the nest is very strong with hard wall and "skeleton", thick wall layer that cover whole the nest quite thick to keep the condition inside of the nest be stable.
Uncovering the nest of Globitermes sulphureus by Cuong Do, 2016
Worker termites of the species are very active and they rebuild the next very quick, after only one day, almost of the hole of the nest be covered.
Globitermes sulphureus nest be covered all most of the holes after 1 days, photographed by Cuong Do
And up to the 2nd day, the nest be recover with the wall out side, except some holes (gates), photographed by Cuong Do
A small hole of the nest, the workers are working very hard and they always were protected by yellow solder termites, photographed by Cuong Do.
