Eucalyptus Gall Wasp - Ophelimus maskelli


Ophelimus maskelli is a species of Chalcid Wasp about 1mm long and mainly blackish in colour. The larvae produce galls on the leaves of Eucalyptus species, particularly Eucalyptus camaldulensis.  The galls are numerous, pale green to reddish pustules measuring about 1 mm, sometimes with up to 100 galls on a single leaf. After the wasp has vacated the gall, a conspicuous opening remains in the top.

Identification difficulty

Adult Gall

Recording advice

Adult: Unless identified by a recognised expert, a photo is required and the specimen should be examined with a microscope. In the comments box, state the key or ID method used and describe the size and identifying characters.

Gall: Please provide photograph and state host plant.


Anywhere that Eucalyptus occurs.

When to see it

When Eucalyptus is in leaf.

Life History

There are two or more generations per year.

UK Status

Status in Britain is difficult to determine due to lack of records.

VC55 Status

Status in Leicestershire and Rutland not known.

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Leicestershire & Rutland Map


Yellow squares = NBN records (all known data)
Coloured circles = NatureSpot records: 2020+ | 2015-2019 | pre-2015

UK Map