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280 days of Urbpandemonium #186

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Frankly, I'd never heard of the hackberry tree Celtis occidentalis* before my first encounter with the hackberry nipple gall. I think we can agree that's one of the most wonderful word combinations I've placed here. The galls are made by aphid-like insects called psyllids, in the genus Pachypsylla, including notably Pachypsylla celtidismamma.** The galls also harbor some non-gallmaking psyllids who benefit from their relatives' alteration of the hackberry leaf.
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*Western hackberry

**Hackberry breast thick flea

Comments

( 1 comment — Leave a comment )
froganon
Oct. 12th, 2015 12:31 am (UTC)

Yes we have hackberries here. Whether or not I can identify the tree from day to day is questionable in my case.

I do love galls though. Rather fascinating and I always want to split them open.
( 1 comment — Leave a comment )

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