Ipana glacialis is a species of moth in the family Geometridae. This species was first described by George Hudson in 1903. It is endemic to New Zealand and is found in the central and western parts of the South Island. This species inhabits open country at the alpine zone. Adults are on the wing
Taxonomy This species was first described by George Hudson in 1903 and originally named Declana glacialis. George Hudson again discussed and illustrated this species in his 1928 book The butterflies and moths of New Zealand under that name. In 2023 this species was placed in the genus Ipana. The male lectotype, collected by Hudson at the Sealey Range in the Mackenzie High Country, is held at Te Papa.
Description The wingspan of this species ranges between 27 and 35 mm. Hudson described this species as follows:
Distribution I. glacialis is endemic to New Zealand and is found in the central and western parts of the South Island.
Habitat This species inhabits open country in the alpine zone.
Behaviour Adults are on the wing from November until January. This species is day flying. The male is a rapid flyer during hot sunshine, particularly in the late afternoon. The female is rarer and less active.
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