Lucanus formosanus

Lucanus formosanus is a stag beetle which is endemic to Taiwan,^[1] and grows to a length of 45–80 millimetres (1.8–3.1 in). Like other species in the Lucanid family, L. formosanus exhibits distinct sexual dimorphism and subsequent external morphological allometry in males. Males of the species develop mandibles of various forms depending on geographic location; i.e. northern, central, and southern morphs.^[2]

Lucanus formosanus
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Insecta
Order:	Coleoptera
Suborder:	Polyphaga
Infraorder:	Scarabaeiformia
Family:	Lucanidae
Genus:	Lucanus
Species:	L. formosanus
Binomial name
Lucanus formosanus Planet, 1899