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Elaphus Long-jawed Stag
AdvancedCyclommatus elaphus
The largest species of Cyclommatus from Sumatra and the Malay Peninsula. Has extremely long mandibles relative to body length, with a ratio ranking among the world's top. The reddish-brown body and slender body shape radiate unique beauty.
Difficulty
Advanced
Temperature
20〜26℃
Lifespan
Adult 3-6 months
Size
30-90mm
Humidity
60〜80%
Diet
Tree sap, beetle jelly
About
Cyclommatus elaphus is a flagship and one of the largest species in the slender stag beetle genus Cyclommatus, found on Sumatra and the Malay Peninsula. It is celebrated for mandibles that are extremely long relative to body length, among the highest such ratios known. Its reddish-brown color and slender, elongate form give it a distinctive beauty. In captivity a small to medium enclosure is used, with adults fed insect jelly. Fine fermented substrate is used for oviposition, and larvae are reared in fungal substrate bottles or quality substrate. The long, delicate mandibles require careful handling. Maintaining moderately high humidity supports stable keeping of this popular species.
Source: Wikipedia (CC BY-SA 4.0)
Basic Info
Origin
Sumatra and the Malay Peninsula
Lifespan
Adult 3-6 months
Size
30-90mm
Temperature
20〜26℃
Humidity
60〜80%
Diet
Tree sap, beetle jelly
Care Guide
Temperature
Maintain 20-26°C
Breeding Records & Localities
Captive record (♂)
97.5 mm
Wild record (♂)
109 mm
Record source: BE-KUWA 2025年度版（エラフス 飼育97.5mm 中川元喜 2013 / 野外109.0mm）
Notable localities
インドネシア（スマトラ島）
ホソアカクワガタ最大級。細く長い大顎が特徴。野外レコード(109.0mm)が飼育を上回る。飼育レコードは BE-KUWA（むし社）のコンテストで毎年更新される。産地・累代（CBF/WF/WD）・サイズで個体価値が大きく変動する。
Generation codes
- WD
- Wild-caught
- WF1
- Offspring of a wild-caught female
- F1〜
- Captive generations (same locality)
- CBF1
- Cross-locality captive-bred (reset)
Sources: BE-KUWA 認定飼育レコード（むし社、2025年度版）
References & Sources
Edited & verified by: br-choku editorial team
The taxonomic, regulatory, and husbandry data on this page are compiled and verified against the authoritative primary sources below.
Taxonomy & Authority
Accepted name: Cyclommatus elaphus Gestro, 1881
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
Plant Protection Act: コガネムシ上科(カブトムシ・クワガタムシ・ハナムグリ等)の生きた個体を輸入する際は、外来生物法に基づき輸出国政府機関等が発行する種類名証明書の添付が必要(輸入港は成田・中部・関西・福岡・鹿児島の各空港に限定)。本種自体は特定外来生物ではなく、証明書の添付により輸入可能。
Sources: 環境省 外来生物法「コガネムシ上科に含まれる生きた昆虫を輸入される方へ」 / CITES 附属書(checklist.cites.org)
Regulations may change. Always verify the latest information with the relevant authorities.
Elaphus Long-jawed Stag Listings
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