Xylophilus luniger is a beetle that is endemic to New Zealand.

This member of the family Aderidae is commonly collected by beating vegetation around the margins of native forest.

[2] X. luniger is one of at least 9 species found in the genus Xylophilus in New Zealand.

[2] Xylophilus luniger is sexually dimorphic; many male members of the genus Xylophilus have strangely modified antennae while females have unmodified straight antennae.

[2] In males of Xylophilus luniger, antennomeres 7-9 are highly modified.