Xanthorhoe frigida

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Xanthorhoe frigida
Xanthorhoe frigida female.jpg
Female
Xanthorhoe frigida male.jpg
Male
Status NZTCS NV.svg
Nationally Vulnerable (NZ TCS) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Lepidoptera
Family: Geometridae
Genus: Xanthorhoe
Species:
X. frigida
Binomial name
Xanthorhoe frigida
Howes, 1946 [2]

Xanthorhoe frigida is a species of moth in the family Geometridae. It is endemic to New Zealand. The larvae of this species feeds on species in the plant genus Pachycladon including the threatened Pachycladon wallii'. The adults of this species are on the wing from December to February. This moth is classified as nationally vulnerable by the Department of Conservation.

Contents

Taxonomy

Xanthorhoe frigida was first described by George Howes in 1946 using a specimen collected by T. M. Smith at Homer in December 1944. [3] The holotype specimen is held at Museum of New Zealand Te Papa Tongarewa. [4]

Description

Howes described the species as follows: [3]

Wing expanse 35mm. Head and face grey. Antennae grey with fairly long ciliations. Thorax grey with thin dark line transversely across shoulders. Abdomen silver-grey with dark brown marks at the base of each segment. Forewings grey, faintly brown tinged and crossed with grey-white lines. There is a small white patch at base in which a thin grey line runs centrally from costa to dorsum. First line dark grey, almost black, fading into a white patch on the basal side and edged on the terminal side with a narrow clear white line. Beyond this is a light grey area with a darker central line crossing the wing. The second line is white with a narrow grey line edging it on the basal side, and a dark grey patch on the terminal side. In the centre of this patch and half way across the wing there is a clear white which starts on the costa to swell out into an elongate oval area reaching halfway to the dorsum. The rest of this area is grey. Then follows a narrow white band centred with a thin grey line and edged with dark grey on the basal side. The outer terminal of the wing is grey with a brownish suffusion, and on this the subterminal line appears in clear white. All lines are bluntly indented. The veins are indicated by dark lines lightly dotted with minute white dots. On the termen at the vein endings there are distinct X marks in dark brown. Cilia grey-brown with a slight ocherous basal line. Lower wings silver grey with three faint grey transverse lines and an incomplete subterminal line. Cilia greyish-brown with slight darker tufts at the vein endings. [3]

Distribution and habitat

This species is endemic to New Zealand. [2] [5] This species can be found in Mackenzie, Central Otago, Otago Lakes and Fiordland areas. [6] This species prefers subalpine/alpine habitat. [6] As at 2000 this species was only known from 5 localities. [6] Other than its type locality, the species has more recently been collected at Rastus Burn Basin, The Remarkables in December and February, [7] the Eyre Ecological District, northern Southland, [8] and in the alpine zone of the Ben Nevis Pastoral lease area, Central Otago. [9]

Host plants

Pachycladon wallii, a host plant of X. frigida. Pachycladon wallii 1265520.jpg
Pachycladon wallii, a host plant of X. frigida.

This species feeds on Pachycladon species. [10] A host plant of this species is the at risk and naturally uncommon Pachycladon wallii . [6] [8]

Conservation status

This species has the "Nationally Vulnerable" conservation status under the New Zealand Threat Classification System. [1]

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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. (2015). "Conservation status of New Zealand butterflies and moths (Lepidoptera)" (PDF). New Zealand Threat Classification Series. 20: 1–13.
  2. 1 2 "Xanthorhoe frigida Howes, 1946". www.nzor.org.nz. Landcare Research New Zealand Ltd. Retrieved 7 May 2018.
  3. 1 2 3 Howes, W. G. (1946). "Lepidoptera collecting at the Homer, with descriptions of new species". Transactions and Proceedings of the Royal Society of New Zealand. 76: 139–147.
  4. ↑ Dugdale, J. S. (1988). "Lepidoptera - annotated catalogue, and keys to family-group taxa" (PDF). Fauna of New Zealand. 14: 191. Retrieved 6 May 2018.
  5. ↑ 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. 1 2 3 4 Patrick, B. H.; Dugdale, J. S. (2000). "Conservation status of the New Zealand Lepidoptera" (PDF). Science for Conservation. 136: 33. ISSN   1173-2946.
  7. ↑ Patrick, Brian H.; Brian M., Lyford; Ward, John B.; Barratt, Barbara I.P. (1992). "Lepidoptera and other insects of the Rastus Burn Basin, The Remarkables, Otago". Journal of the Royal Society of New Zealand. 22 (4): 265–278. doi: 10.1080/03036758.1992.10420820 .
  8. 1 2 Mark, A.F.; Dickinson, K.J.M.; Patrick, B.H.; Barratt, B.I.P.; Loh, G.; McSweeney, G.D.; Meurk, C.D.; Timmins, S.M.; Simpson, N.C.; Wilson, J.B. (December 1989). "An ecological survey of the central part of the Eyre Ecological District, northern Southland, New Zealand". Journal of the Royal Society of New Zealand. 19 (4): 349–384. doi:10.1080/03036758.1989.10421841.
  9. ↑ Crown Pastoral Land Tenure Review Ben Nevis Conservation Resources Report (PDF) (Report). Land Information New Zealand. 2004. p. 18. Retrieved 6 May 2018.
  10. ↑ "Xanthorhoe frigida Howes, 1946 (Herbivore)". Plant-SyNZ. Retrieved 19 March 2019.

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