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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. 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.
The Rosenberg's Stag Beetle lives Adult 3-6 months.
The Rosenberg's Stag Beetle grows to 40-75mm.
As a highland species, it is sensitive to heat; captive temperatures must be maintained at 18–24°C.
Origin
highland forests of Java, Indonesia
Lifespan
Adult 3-6 months
Size
Captive record (♂)
80.3 mm
Wild record (♂)
83 mm
Record source: BE-KUWA 2025 edition (Rosenberg - captive 80.3 mm Shikura Hiroyuki 2008 / wild 83.0 mm)
Notable localities
A species of golden oni stag beetle (rosenbergi). Captive breeding records are updated annually through BE-KUWA (Mushi-sha) competitions. Individual value varies significantly depending on locality, generation (CBF/WF/WD), and size.
Generation codes
Sources: BE-KUWA Certified Breeding Records (Mushi-sha, FY2025 edition, JA)
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: 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: When importing live specimens of Scarabaeoidea (including rhinoceros beetles, stag beetles, flower beetles, etc.), a species identification certificate issued by the exporting country government agency or equivalent must be attached in accordance with the Invasive Species Act (import ports are limited to Narita, Chubu, Kansai, Fukuoka, and Kagoshima airports). This species itself is not a designated invasive species, and import is possible upon submission of the certificate.
Sources: Ministry of the Environment, Invasive Species Act: "Guidance for Those Importing Live Insects in Scarabaeoidea" / CITES Appendix (checklist.cites.org)
Regulations may change. Always verify the latest information with the relevant authorities.
Find listings for this species
40-75mm
Temperature
20〜28℃
Humidity
60〜80%
Insect jelly
Dryness is fatal. Maintain 70%+ humidity
From the Javan highlands and heat-sensitive, it needs cool management at 18-24°C. Keep humidity in the case high.
Keep in a case that holds high humidity. It weakens rapidly when dry, so check substrate moisture daily.
Feed adults beetle jelly. Raise larvae on reishi wood or reishi mushroom substrate, as they grow poorly in ordinary kinshi bottles.
Use reishi wood or dedicated mushroom substrate for egg laying. It will not lay in ordinary logs, so prepare the special material in advance.
Adults live only about 3-6 months. Have all three conditions ready before acquiring one: high humidity, cool temperature, and special substrate.
Advanced. This is an advanced-level species. It requires specialized equipment and advanced husbandry skills with precise environmental control.
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 bloodline, size, captive-bred generation, and sex. Check our market price page for the latest pricing information.
Last updated: August 31, 2026