Hydriomena iolanthe

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Hydriomena iolanthe
Fig 18 MA I437923 TePapa Plate-LXII-A-supplement full (cropped).jpg
Illustration of female by George Hudson
Status NZTCS DD.svg
Data Deficient (NZ TCS) [1]
Scientific classification Red Pencil Icon.png
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Hydriomena
Species:
H. iolanthe
Binomial name
Hydriomena iolanthe
Hudson, 1939
Synonyms
  • Xanthorhoe iolantheHudson, 1939

Hydriomena iolanthe is a species of moth in the family Geometridae. It is indigenous to New Zealand. This species is based on a single specimen that is now lost and has not been matched to any known species. As such it is classified as data deficient by the Department of Conservation.

Contents

Taxonomy

This species was first described by George Hudson in 1939 using a female specimen collected at Lake Harris by F. S. Oliver in January 1918. [2] [3] Due to the single specimen being damaged and lacking antennae, Hudson was uncertain of the generic position of the species. [2] He therefore named the species Hydriomena (or Xanthorhoe) iolanthe. [2] The illustration is labelled Hydriomena? iolanthe. [2] The classification of New Zealand endemic moths within the genus Hydriomena is regarded as unsatisfactory and in need of revision. [4] As such this species is currently also known as Hydriomena (s.l.) iolanthe. [5] [4] This species may prove synonymous as the hototype specimen has been lost and it is possible it is a European species that was mislabelled. [6] [7] It was listed in the New Zealand Inventory of Biodiversity as nomen dubium. [5]

Description

Hudson described the species as follows: [2]

The expansion of the wings is 7⁄8 inch (22 mm.). The forewings have the apex rather obtuse and the termen slightly oblique; there is a deep reddish-brown basal patch followed by a rather indistinct pale transverse line; the subbasal area is orange-brown, followed by a narrow whitish-ochreous band from 1⁄4 of costa to 1⁄3 of dorsum; this band is abruptly bent outwards just below costa and contains a fine blackish line; the median band is dull red, slightly purplish tinged; it contains a small black discal dot and two fine wavy blackish lines enclosing an irregular central area; the outer edge of the median band is finely waved, with slight irregular projections below costa, and a more evident rounded projection in disc; the dorsal third of the median band is much narrower; beyond the median band the ground colour of the wing is pale brownish-ochreous; there are two fine wavy blackish lines immediately outside the median band; a conspicuous yellowish-brown patch on the costa before apex and a blackish-brown patch below this; a very wavy paler subterminal line and a series of minute terminal marks. The hind-wings are dull whitish-ochreous, with numerous pale brownish-ochreous transverse lines and terminal band, some of the lines become blackish towards dorsum; there is a series of minute terminal dots; the cilia of all the wings are dull brownish-ochreous. [2]

Distribution

This species is indigenous to New Zealand. [3] This species is found on the Otago Lakes Fiordland border. [8] It is only known from the type locality of Lake Harris on the Routeburn Track. [8]

Biology and behaviour

This species is on the wing in January. [2]

Host species

It has been hypothesised that the host of the larvae of H. iolanthe is possibly a species of Coprosma . [8] The reasoning behind this hypothesis is that the illustration of the species resembles an Austrocidaria and Coprosma plants are the host for species in that genus. [8]

Conservation status

This species has been classified as having the data deficient conservation status under the New Zealand Threat Classification System. [1] Hudson's description was based on a single specimen which is now lost. [8] [5] The illustration by Hudson has not been matched to any known endemic or adventive species. [8] [5]

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References

  1. 1 2 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.
  2. 1 2 3 4 5 6 7 Hudson, G. V. (1939). A Supplement to the Butterflies and Moths of New Zealand. Wellington: Ferguson & Osborn Ltd. p. 407. OCLC   221041540 . Retrieved 1 June 2018.
  3. 1 2 "Hydriomena iolanthe Hudson, 1939". New Zealand Organisms Register. Landcare Research New Zealand Ltd. Retrieved 1 June 2018.
  4. 1 2 Hoare, R. J. B.; Rhode, B. E.; Emmerson, A. W. (2012). "Larger moths of New Zealand: Image gallery and online guide. Notes on families and subfamilies of larger moths included in this guide". Landcare Research. Retrieved 1 June 2018.
  5. 1 2 3 4 Gordon, Dennis P., ed. (2010). New Zealand inventory of biodiversity: Kingdom animalia : chaetognatha, ecdysozoa, ichnofossils. Vol. 2. p. 460. ISBN   978-1-877257-93-3. OCLC   973607714. OL   25288394M. Wikidata   Q45922947.
  6. ↑ Dugdale, J.S. (1971). "Entomology of the Aucklands and other islands south of New Zealand: Lepidoptera, excluding non-crambine Pyralidae" (PDF). Pacific Insects Monograph. 27: 55–172.
  7. ↑ "NZTCS Lepidoptera Spreadsheet". www.doc.govt.nz. 2013. Retrieved 1 June 2018.
  8. 1 2 3 4 5 6 Patrick, B. H.; Dugdale, J. S. (2000). "Conservation status of the New Zealand Lepidoptera" (PDF). Science for Conservation. 136: 25. ISBN   0478218672. ISSN   1173-2946. Archived from the original (PDF) on 2017-05-01. Retrieved 2018-06-01– via Department of Conservation.
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