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Ceruchus lignarius
A small stag beetle of about 12 mm. Where most stag beetles are flattened, this one has a cylindrical body with a strong sheen. It lives in subalpine and alpine forest between about 1,000 and 2,000 m.
Ceruchus lignarius is a small stag beetle of about 12 mm regarded as a primitive member of the family. Where most stag beetles are flattened, this one is cylindrical, a form it shares with the bessbugs thought to be close to the ancestors of stag beetles. The surface is strongly glossy and the elytra carry clear longitudinal striae. The mandibles bear a single inner tooth at the base and reach only about a fifth of the body length. It lives in subalpine and alpine forest between about 1,000 and 2,000 m, where both adults and larvae are found inside damp, brown-rotted fallen logs, most often beech and Japanese oak but also katsura and fir. Some individuals never leave the wood at all, and they come to lights less often than most stag beetles. The larval period runs one to two years depending on the climate. The species is extremely intolerant of heat, and in the lowlands of the Kanto region in summer nearly all die unless kept cool. Adults that eclose in late summer overwinter in the pupal chamber.
Source: Wikipedia (CC BY-SA 4.0)
The Glossy Stag Beetle lives Adults 6 months to 1 year.
The Glossy Stag Beetle grows to About 12mm.
Origin
Japan (subalpine and alpine zones of Hokkaido, Honshu, Shikoku and Kyushu)
Lifespan
Adults 6 months to 1 year
Size
About 12mm
Edited & verified by: BreederDirect editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Accepted name: Ceruchus lignarius Lewis, 1883
Synonyms: Ceruchus lignarius monticola, Ceruchus lignarius nodai
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Sources: CITES Appendix (checklist.cites.org)
Regulations may change. Always verify the latest information with the relevant authorities.
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Temperature
20〜28℃
Humidity
60〜80%
Larvae eat brown-rotted wood; adults take little more than water
It is reported to be extremely intolerant of heat: in the lowlands of the Kanto region in summer nearly all die unless actively cooled. It lives inside damp, brown-rotted wood, so the moisture of that wood must be kept up as well.
Adults and larvae alike live inside damp, brown-rotted fallen logs, most often beech and Japanese oak but also katsura and fir. The larval period runs one to two years depending on the climate. The robber fly Laphria mitsukurii is known to parasitise the pupae.
It is small with short mandibles and not a fighter, but the beetles should not be crowded inside one piece of wood. Even among small mountain species, beetles of different species or localities should not share the same log.
The adults are thought to be active in late summer, and those that eclose as summer ends overwinter in the pupal chamber. Adults take little beyond water, and although they can fly they leave the wood only when seeking a new breeding site.
Heat is the commonest cause of death, so do not keep this beetle where summer temperatures cannot be controlled. Three subspecies are recognised by region, the nominate form plus monticola and nodai, and beetles from different localities should not be mixed.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The average lifespan of Glossy Stag Beetle is Adults 6 months to 1 year. With proper care and nutrition, they can live a long and healthy life.
Glossy Stag Beetle typically reaches About 12mm as an adult. Size may vary depending on care conditions and individual genetics.
Glossy Stag Beetle feeds on: Larvae eat brown-rotted wood; adults take little more than water. Aim for a balanced diet with appropriate feeding frequency.
The price of Glossy Stag Beetle varies significantly depending on bloodline, size, captive-bred generation, and sex. Check our market price page for the latest pricing information.
Last updated: September 17, 2026