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Leaf cocoon with holes

Description:

A very curious spotting ! A young eucalyptus leaf stuck to the balde of a mature leaf forming a cocoon of some sort of an arthropod. The young leaf which was slightly lifted to accommodate the occupant had some height to it and the margins were puckered. On the young leaf were small neatly cut holes at intervals. Pic 3 shows that some of the holes were not completely cut.
The underside of the mature leaf showed no signs of damage.
Spotted two of these structures on this tree.

Habitat:

Spotted on Grey Box in a suburban backyard.

Notes:

A similar spotting was made around the same time by Ernst Weiher in coastal heathland and also on a gum tree but some 50 kms away. That tree was probably E.viminalis ( manna gum).
http://www.projectnoah.org/spottings/993... I am very curious to know what this is and the story behind the holes ! Will be doing more investigation. Would welcome any comments . thanks.

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Leuba Ridgway
Spotted by
Leuba Ridgway

Victoria, Australia

Spotted on Oct 21, 2014
Submitted on Nov 1, 2014

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