Elachista plagiaula (Meyrick, 1938)
Thectophila plagiaula Meyrick, 1938a: 427 . Type locality: New Zealand, Freehold Range, Lake Ohau (Meyrick 1938a: 427). Holotype ♂ by original designation, in CMNZ. See Remarks.
Elachista plagiaula: Dugdale (1988: 112) .
Subgenus: Elachista; bifasciella species group.
Distribution: Australasian. New Zealand.
Larval host plant(s): unknown.
Figs.: Hudson (1939).
Remarks: Dugdale (1988: 112) states that a parelectotype is deposited in NHMUK. Because a holotype was designated in the original description, this specimen is a paratype, not a paralectotype.