
AI-generated image
Allotopus rosenbergi
A beautiful golden stag beetle from Java highlands. Most commonly available among golden stag beetles.
Allotopus rosenbergi, Rosenberg's golden stag beetle, is the most commonly available species in the Allotopus genus, native to the highland forests of Java. The entire body shines with a stunning golden metallic luster, and adults reach 40–75 mm in length. As a highland species, it is sensitive to heat; captive temperatures must be maintained at 18–24°C. High humidity is equally critical—the enclosure must remain consistently moist, as desiccation rapidly weakens and kills adults. Larval rearing requires reishi (Ganoderma) fungal wood or equivalent specialized substrate; standard fungal substrate bottles are generally insufficient. Egg-laying also requires appropriate fungal wood. Adults live approximately 3–6 months. Despite requiring specialized husbandry conditions—low temperature, high humidity, and specialized substrate—the species is considered the best introduction to golden stag beetles, and its breathtaking coloration makes it one of the most visually rewarding beetles in the hobby.
Origin
highland forests of Java, Indonesia
Lifespan
Adult 3-6 months
Size
40-75mm
Temperature
20〜28℃
Humidity
60〜80%
Insect jelly
Captive record (♂)
80.3 mm
Wild record (♂)
83 mm
Record source: BE-KUWA 2025年度版(ローゼンベルグ 飼育80.3mm 宍倉裕之 2008 / 野外83.0mm)
Notable localities
オウゴンオニクワガタの一種(rosenbergi)。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
Sources: BE-KUWA 認定飼育レコード(むし社、2025年度版)
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.
Accepted name: Allotopus rosenbergi (Snellen van Vollenhoven, 1872)
Synonyms: Prosopocoilus rosenbergi Snellen van Vollenhoven, 1872
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
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.
Find listings for this species
Keep in case that maintains high humidity
Cool temperature management 18-24°C needed
Reishi wood is standard for egg laying
Dryness is fatal. Maintain 70%+ humidity
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
The ideal temperature for Rosenberg's Stag Beetle is 20〜28℃. Recommended humidity is 60〜80%. Avoid sudden temperature changes and maintain a stable environment.
The average lifespan of Rosenberg's Stag Beetle is Adult 3-6 months. With proper care and nutrition, they can live a long and healthy life.
Rosenberg's Stag Beetle typically reaches 40-75mm as an adult. Size may vary depending on care conditions and individual genetics.
Rosenberg's Stag Beetle feeds on: Insect jelly. Aim for a balanced diet with appropriate feeding frequency.
The price of Rosenberg's Stag Beetle varies significantly depending on morph, size, and lineage. Check our market price page for the latest pricing information.
Last updated: June 23, 2026