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Fly gall on Eucalyptus

Family: Diptera

Description:

Looking like a miniature bok choy (chinese cabbage) these pea-sized galls with a bulbous base and cluster of leaves at the free end, were seen at the axils on this young eucalyptus tree. A cut section of the thick part of the gall revealed a white "crunchy" core with a unilocular chamber in the centre. A white translucent larva about 2 mm long was seen in the cavity. The head end of the larva showed two minute black specks on either side of the midline.

Habitat:

Spotted on a broad-leaved eucalyptus sapling (pic 6). Spotted about 3 or 4 of these on the one sapling.

Notes:

I am not able to find any matches for this and have never seen such galls before. This particular sapling was heavily attacked by nolid caterpillars (Uraba lugens). Looks like a fly gall . Need to ID.

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3 Comments

Leuba Ridgway
Leuba Ridgway 6 years ago

Martin, if you see this spotting again, you were right. Looks like I a dipteran gall, Found the same sapling and dissected another gall - found the larva inside. Do you recognise the type ? I will keep looking.

Leuba Ridgway
Leuba Ridgway 6 years ago

Martin, I am almost certain that the little fast moving "nymph" came from inside the gall but I might be able to find these galls again and check it out once more. One thing made me wonder though, the size of the cavity was perhaps a little too large for the nymph.

I was hoping L.Cook might get to see this one.

MartinL
MartinL 6 years ago

I do think these galls are the same as mine. I suspected a hymenoptera or diptera wth a larviform larva inside but I didn't investigate :(
Your psyllid is either a random free living one or if it is the cause of the gall, its quite intriguing.

Leuba Ridgway
Spotted by
Leuba Ridgway

Victoria, Australia

Spotted on Sep 19, 2014
Submitted on Sep 20, 2014

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