Xenomusa tetramera Lower, 1894
Arched Casbia
CABERINI,   ENNOMINAE,   GEOMETRIDAE,   GEOMETROIDEA
 
Don Herbison-Evans
(donherbisonevans@yahoo.com)
and
Stella Crossley


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

This caterpillar is brown with squarish dark marks on the back of each segment. It was found feeding on

  • Dogwood ( Pomaderris apetala, RHAMNACEAE ).


    female
    (Photo: courtesy of Peter Marriott, Moths of Victoria: Part 7)

    The adult moth has grey-brown wings, each with three variable blurred, sometimes blotchy, dark transverse arcs, the outer one often accompanied by a straightish transverse pale yellow line diverging to be wider near the costa.


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

    At rest the wings are held flat. The moths have a wingspan of about 4 cms. The males have well-developed feathered antennae. The females have thread-like antennae.


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

    The eggs are oval with a fine embossed pattern of serrated ridges. Initially they are yellow, but they develop red markings as hatching approaches.

    The species has been found in

  • Australian Capital Territory,
  • Victoria, and
  • Tasmania.

    This species is unplaced, and its genus is under review. This species has been synonomised with Casbia crataea by some taxonomists, but here, following Nielsen et al., we list them each separately.


    Further reading :

    Marilyn Hewish,
    Moths of Victoria: Part 7,
    Bark Moths and Allies - GEOMETROIDEA (D)
    ,
    Entomological Society of Victoria, 2016, pp. 6-7, 14-15.

    Oswald B. Lower,
    New Australian Heterocera,
    Transactions of the Royal Society of South Australia,
    Volume 18 (1894), p. 82.


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    (written 21 March 2018, updated 22 February 2020, 18 March 2021)