Costachorema notopterum is a species of caddisfly belonging to the family Hydrobiosidae. The species was first described by Keith Arthur John Wise in 1972, and is endemic to the Auckland Islands of New Zealand.
The species was identified by Wise in 1972 using the spelling Costachorema notoptera, based on a specimen collected by Wise from Enderby Island off the coast of Auckland Island in 1963.[1]
Wise's original text (the type description) reads as follows:
Wise measured the anterior wings of male specimens as ranging between, with female species slightly larger at . The head and body of male specimens measures between, with female ranging between . C. notopterum larvae are pale purple in colour, with darker bands and pale spots.
The species is morphologically similar to Costachorema psaroptera. The two species can be differentiated by the presence of white hairs on the head of C. psaroptera.
The species is endemic to the Auckland Islands of New Zealand.[2]