[4] Phasmotaenia lanyuhensis is similar and closely related to P. sanchezi, the type species of the genus Phasmotaenia from the Philippines, but has a more robust body, relatively shorter mesothorax, larger head, and shorter antennae.

The legs are long and slender and bear numerous small serrations; the femora may have four dark brown bands in females.

[1] This species is very common on Orchid Island where they primarily occur in the forested areas, hanging underneath branches in the daytime.

Their food plant is Bischofia javanica (although in captivity they readily accept Turpinia formosana).

They roam around their food plant about an hour before sunrise, mostly no higher than about ten meters above the ground.