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Apiomorpha urnalis
Elongated urn shaped galls with flared free ends were spotted on stems of this yellow box. Attached to the length of the gall in Pic 1 is a calcareous tube constructed by a spittle bug nymph (froghopper) that is also a small hemipteran but from a different suborder.
Spotted on one of the Yellow Box trees (Eucalyptus melliodora) planted along the periphery of a playground.
These galls are induced by small female scale insects. This wonderful spotting by Martin shows the wingless female inside the gall
https://www.projectnoah.org/spottings/13...
Gall inducing insects are usually species specific and in some cases tissue specific on the plants they gall. Galls provide both nutrition and shelter to the developing nymph.
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