Idiodes siculoides (Walker, 1860)
(previously known as Choara siculoides)
Straight-winged Bracken Moth
LITHININI,   ENNOMINAE,   GEOMETRIDAE,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@outlook.com)
and
Cathy Byrne & Stella Crossley

Idiodes siculoides
(Photo: courtesy of Cathy Byrne, Claremont, Tasmania, Moths of Victoria: Part 7)

These Caterpillars are loopers, having only 4 prolegs. They are brown with a light and dark markings.

Idiodes siculoides
(Photo: courtesy of Cathy Byrne, Claremont, Tasmania, Moths of Victoria: Part 7)

The caterpillars feed on ferns, including:

  • Bracken ( Pteridium esculentum, POLYPODIOPHYTA ).

    Idiodes siculoides
    male
    (Photo: courtesy of Cathy Byrne, Moths of Victoria: Part 7)

    The adult moth of this species is brown with varied markings often including a line or line of dots from the wingtip to midway along the hind margin on each forewing, and a similar submarginal line on the each hindwing. The forewings have hooked wingtips. The wingspan is about 4 cms.

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

    The females have thread-like antennae. The males have thicker antennae The adult moths can be distinguished from those of the similar species Idiodes apicata by the white transverse line on top of the head joining the antennae.

    Idiodes siculoides
    eggs, magnified
    (Photo: copyright Cathy Byrne, Claremont, Tasmania)

    The eggs are spherical and covered in a fine embossed honeycomb pattern. Initially they are white, darkening through pink as hatching approaches.

    Idiodes siculoides
    underside, male
    (Photo: courtesy of Marilyn Hewish, Moths of Victoria: Part 7)

    The species occurs over much of Australia, including:

  • New South Wales,
  • Australian Capital Territory,
  • Victoria,
  • Tasmania, and
  • South Australia.


    Further reading :

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

    Francis Walker,
    Geometrites,
    List of the Specimens of Lepidopterous Insects in the Collection of the British Museum,
    Part 21 (1860), p. 291, No. 1.


    previous
    back
    caterpillar
    Australian
    Australian Butterflies
    butterflies
    Australian
    home
    caterpillars
    Australian
    Australian Moths
    moths
    next
    next
    caterpillar

    (updated 25 October 2010, 8 October 2013, 17 June 2016, 9 August 2018)