Idiodes prionosema Turner, 1919
(possible synonym of Idiodes tenuicorpus Prout, 1916)
LITHININI,   ENNOMINAE,   GEOMETRIDAE,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Stella Crossley

Idiodes prionosema
(Photo: courtesy of Marilyn Hewish, Moths of Victoria: Part 7,)

The adult moths of this species are various shades of brown with varied markings often including a submarginal zigzag line, and a nearly straight line across the middle, and a curved line around the base, of each wing.

Idiodes prionosema
view of underside
(Photo: courtesy of Peter Marriott, Moths of Victoria: Part 7,)

The undersides have similar markings, with a dark spot near the middle of each hindwing,, and an exagerated indentation in the zigzag line by the spot. The forewings have hooked tips. The wingspan is about 4 cms.

Idiodes prionosema
(Photo: courtesy of Marilyn Hewish, Moths of Victoria: Part 7,)

The species occurs over the southern half of Australia, including:

  • New South Wales,
  • Victoria, and
  • Tasmania.

    Idiodes prionosema
    (Photo: courtesy of CSIRO/BIO Photography Group, Centre for Biodiversity Genomics, University of Guelph)

    This species may be the same as Idiodes pellophanes (Turner 1947) or Idiodes tenuicorpus L.B. Prout 1916. In the latter case the name Idiodes prionosema Turner 1919, would become the junior synonym, and would be seldom used. More research on the holotype specimens needs to be done to determine if this is the case or not.


    Further reading :

    Marilyn Hewish,
    Moths of Victoria: Part 7,
    Bark Moths and Allies - GEOMETROIDEA (D)
    ,
    Entomological Society of Victoria, 2016, pp. 6-9.

    Louis Beethoven Prout,
    New genera and species of Indo-Australian Geometridae,
    Novitates Zoologicae,
    Volume 23 (1916), p. 49.

    A. Jefferis Turner,
    Revision of Australian Lepidoptera VI (Third instalment),
    Proceedings of the Linnean Society of New South Wales,
    Volume 44 (1919), pp. 291-292, No. 184.


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    (written 12 March 2018, updated 9 August 2018)