Hexarthrius mandibularis

Hexarthrius mandibularis is the world's largest fork-horned stag beetle[1]. It belongs to the tribe Lucanini, in the family Lucanidae.[2]

Hexarthrius mandibularis
Hexarthrius mandibularis sumatranus
Scientific classification
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Coleoptera
Family: Lucanidae
Genus: Hexarthrius
Species:
H. mandibularis
Binomial name
Hexarthrius mandibularis
(Mizunuma, 1994)

This beetle has a dull, dark, brick reddish body. Both the legs and antennae are blackish. The most notable characteristic are the large, antler-like mandibles. These have small teeth running down the inside edge, with one large, forward-pointing pair located approximately a third of the way down from the tips. The tips are forked inward somewhat.

During the larval stage, Hexarthrius mandibularis lives in rotten hardwood, feeding on it. Later, during the imago stage, it consumes tree juice.

Subspecies

There are two subspecies, both native to Indonesia:[3]

  • Hexarthrius mandibularis mandibularis Deyrolle, 1881[4]
This subspecies grows to a maximum length of 115 mm. It is indigenous to Kalimantan.
  • Hexarthrius mandibularis sumatranus Mizunuma, 1994[5]
This subspecies grows to a maximum length of 118.5 mm. It is indigenous to Sumatra.
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References
  1. The Breeding and Rearing of Hexarthrius mandibularis
  2. "HEXARTHRIUS MANDIBULARIS SUMATRANUS ( MIZUNUMA, 1994 ) : LES LUCANIDAE DU MONDE". Lucanesdumonde.skynetblogs.be. Archived from the original on 2016-03-04. Retrieved 2012-02-15.
  3. "The Breeding/Rearing of Hexarthrius mandibularis sumatranus". Harink.com. Archived from the original on 2010-05-30. Retrieved 2012-02-15.
  4. "BioLib - Hexarthrius mandibularis mandibularis". Biolib.cz. 2011-07-05. Retrieved 2012-02-15.
  5. "BioLib - Hexarthrius mandibularis sumatranus". Biolib.cz. 2011-07-05. Retrieved 2012-02-15.


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