Source: Wikimedia Commons
Mniszech's Long-jawed Stag Beetle
IntermediateCyclommatus mniszechi
A Cyclommatus from Taiwan, also traded in Japan under a name referring to the crest on its head. A process juts forward from the head, and large males arch long, slender mandibles. The captive record is 61.7 mm.
Difficulty
Intermediate
Temperature
20〜28℃
Lifespan
Adults 4-6 months (typical for the genus)
Size
Males 21.3-61.7 mm (captive record 61.7 mm; the wild record is 56.0 mm)
Humidity
60〜80%
Diet
Beetle jelly (in the wild it visits flowers of herbaceous plants)
About
Mniszech's long-jawed stag (Cyclommatus mniszechi) is a Taiwanese member of the genus, described in 1856. The subspecies tonkinensis ranges from south-eastern China into northern Vietnam, and of the 114 specimen records in GBIF, 36 come from Taiwan and 31 from China. In Japan it is also called the cockscomb long-jawed stag after the process jutting from the front of the head, and the BE-KUWA record is filed under that name. The captive record is 61.7 mm against a wild record of 56.0 mm, so breeders have passed the wild figure by more than five millimetres. The smallest certified specimen is 21.3 mm, a wide span in which mandible shape changes markedly with size. Care follows the genus: a firmly packed set of soft log and fine fermented substrate, kept cool and free of stale humid air. Larvae are reared on fermented substrate rather than fungus bottles.
Source: Wikipedia (CC BY-SA 4.0)
Lifespan of the Mniszech's Long-jawed Stag Beetle
The Mniszech's Long-jawed Stag Beetle lives Adults 4-6 months (typical for the genus).
Size of the Mniszech's Long-jawed Stag Beetle
The Mniszech's Long-jawed Stag Beetle grows to Males 21.3-61.7 mm (captive record 61.7 mm; the wild record is 56.0 mm).
Basic Info
Origin
Taiwan (nominate subspecies); the subspecies tonkinensis occurs in south-eastern China and northern Vietnam
Lifespan
Adults 4-6 months (typical for the genus)
Size
Males 21.3-61.7 mm (captive record 61.7 mm; the wild record is 56.0 mm)
Care Specifications
Breeding Records & Localities
Captive record (♂)
61.7 mm
Wild record (♂)
56 mm
Record source: BE-KUWA 2025 edition (Tosaka, Taiwan: captive 61.7 mm, 誠道 2014 / wild 56.0 mm; projected maximum 65 mm. Smallest record 21.3 mm, チームむし社 2024; literature minimum 30.0 mm)
Notable localities
TaiwanSouth-eastern China (subspecies tonkinensis)Northern Vietnam (subspecies tonkinensis)
Regional subspecies
- Cyclommatus mniszechi mniszechi — Taiwan
- Cyclommatus mniszechi tonkinensis — South-eastern China and northern Vietnam
BE-KUWA lists only a single Taiwanese line for this species; there is no captive record for the subspecies tonkinensis.
Generation codes
- WD
- Wild-caught
- WF1
- Offspring of a wild-caught female
- F1〜
- Captive generations (same locality)
- CBF1
- Cross-locality captive-bred (reset)
References & Sources
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.
Primary sources
- Wikipedia
- Ministry of the Environment, Invasive Species Act: "Guidance for Those Importing Live Insects in Scarabaeoidea"
- CITES Appendix (checklist.cites.org)
- BEETLE SCHOOL - Rearing Cyclommatus (egg-laying set, larval rearing, larval period, adult lifespan, breeding cautions)
- Ben's Beetle Breeding Pages - Cyclommatus mniszechi (distribution)
- BE-KUWA Certified Breeding Records (Mushi-sha, FY2025 edition PDF, JA)
- GBIF
Taxonomy & Authority
Accepted name: Cyclommatus mniszechi (Thomson, 1856)
Authority databases: GBIF
Nomenclature follows global taxonomic authority databases.
Regulations & Conservation Status
Not CITES-listed
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.
Mniszech's Long-jawed Stag Beetle Listings
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