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eucalyptus stem galls

? Coccid insect gall

Description:

A thickened section of a stem on a eucalyptus tree with multiple raised openings, some with dried-up "plugs".

Habitat:

Eucalyptus tree- stringy bark

Notes:

These are galls possibly made by scale insects of the Coccidae family - this needs confirmation. The appearance of the galls suggest that they are old; the openings were dry and some had woody plugs. Here are similar stem galls but with spikey outgrowths http://www.projectnoah.org/spottings/123... http://www.projectnoah.org/spottings/140...

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4 Comments

Leuba Ridgway
Leuba Ridgway 8 years ago

Martin, you sure are correct and thanks for the weblink. I looked at another species of Eriococcid insect - Tanyscelis sp that produces stem galls. Although these produce conical eruptions,they seem to be solitary and are not as distinctive as the linear arrangement we have. I understand that they both belong to Coccoidea but why are Eriococcids also referred to as Coccids in some literature - very confusing !

MartinL
MartinL 8 years ago

Leuba, this pimple like eruption (from leaf tissue) is the closest that I can find http://myrmecos.net/insects/Opisthosceli... This supports your ID suggestion but I remain quite uncertain.

Leuba Ridgway
Leuba Ridgway 8 years ago

Martin, It surprised me too that there were only PN spottings on Google. I was frantically searching your spottings for an ID !! :)

MartinL
MartinL 8 years ago

My dissections have shed no light onto this mysterious and distinctive parasite. We've seen these several times and I am rather surprised to see no other images of them on google than our three PN spottings.

Leuba Ridgway
Spotted by
Leuba Ridgway

Melbourne, Victoria, Australia

Spotted on Oct 13, 2012
Submitted on Oct 14, 2012

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Stem gall Wasp gall green leaf axil galls - ? wasp galls Eucalyptus stem gall - Wasp gall

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