This species was originally described by Alfred Philpott in 1927 using a specimen collected from Cooper's Knob, Banks Peninsula by Stewart Lindsay and named Carposina maculosa. George Hudson discussed this species under this name in his 1928 publication The Butterflies and Moths of New Zealand. In 1978 Elwood Zimmerman argued that the genus Heterocrassa should not be a synonym of Carposina as the genitalia in this genus are distinctive. Subsequently John S. Dugdale placed this species within the genus Heterocrossa. The holotype specimen is held at the New Zealand Arthropod Collection.
Philpott originally described the species as follows:
♂ ♀ 18 mm. Head, antennae and thorax light buff. Palpi light buff mixed with ochreous on lower half externally. Abdomen ochreous-white. Legs ochreous-white, anterior and middle parts infuscated. Forewings moderate, costa moderately arched at base, thence straight, apex subacute, termen straight, oblique; light buff finely irrorated with pale fuscous; markings fuscous-black; a dot beneath costa near base and a similar one obliquely before it above dorsum; a minute dot beneath costa at 1⁄4 and a much larger one beneath it below fold; a dot in disc beyond these; a dot beneath costa and two below it in disc before 1⁄2; a small dot beneath costa between these and 3⁄4; two or three dots touching each other and forming a short transverse striga at 3⁄4; an obscure irregular striga from costa at 4⁄5 to tornus; a series round termen: fringes whitish-buff. Hindwings and fringes shining white.
Biology and behaviour
The adult moths are on the wing in November.
Host species and habitat
This species has been classified as having the "Data Deficient" conservation status under the New Zealand Threat Classification System. The main risks to this species are likely habitat fragmentation and loss.
- "Heterocrossa maculosa (Philpott, 1927)". www.nzor.org.nz. Landcare Research New Zealand Ltd. Retrieved 1 June 2018.
- Dugdale, J. S. (1988). "Lepidoptera – annotated catalogue, and keys to family-group taxa" (PDF). Fauna of New Zealand. 14: 131. Retrieved 1 June 2018.
- Philpott, Alfred (1927). "N.Z. Lepidoptera: notes and descriptions." Transactions and Proceedings of the New Zealand Institute. 57: 703–709.
- Hudson, G. V. (1928). The Butterflies and Moths of New Zealand. Wellington: Ferguson & Osborn Ltd. p. 218. OCLC 25449322.
- Zimmerman, Elwood (1978). Insects of Hawaii. 9. Hawaii: University of Hawaii Press. p. 797. ISBN 9780824804879.
- Gordon, Dennis P., ed. (2010). New Zealand inventory of biodiversity. Volume two. Kingdom animalia : chaetognatha, ecdysozoa, ichnofossils. Vol. 2. Christchurch, N.Z.: Canterbury University Press. p. 457. ISBN 9781877257933. OCLC 973607714.
- Pawson, Stephen M.; Emberson, Rowan M. (2000). The conservation status of invertebrates in Canterbury (Report). Department of Conservation. pp. 41–42. ISSN 1171-9834. Retrieved 1 June 2018.
- Hoare, R.J.B.; Dugdale, J.S.; Edwards, E.D.; Gibbs, G.W.; Patrick, B.H.; Hitchmough, R.A.; Rolfe, J.R. (2017). "Conservation status of New Zealand butterflies and moths (Lepidoptera), 2015" (PDF). New Zealand Threat Classification Series. 20: 8.
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