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Spiny bug - Euthochtha galeator

Spiny bug - Euthochtha galeator
Oberlin, Ohio, USA
August 17, 2002
I observed a couple of these on an evening primrose plant in my yard over the course of a few weeks two summers back. Never got a good ID but I think it's similar to Richard's spiny bug (below)
so I was thinking perhaps it was Chariesterus antennator (Bug Eric?)? Then I did a google search on that name and came up with this: Florida Featured Creature - Euthochta galeator. What do you think?

Moved from Euphorbia bug. There has been much discussion over the years on these spikey nymphs. Given Hannah's research and Boris's comments here, it seems best to move them all to Euthochtha where most, if not all, of them will be correctly placed.

Coreidae nymph
Boy, it looks like Chariesterus antennator, but nymphs are just so tricky. Definitely a coreid. Interesting angle, nice photo:-)

Antennal segments seem to be key
"All five instars are characterized by spines, mottling, and a dilated 3rd antennal segment. This is the only coreid nymph in eastern U.S. having the 3rd antennal segment (only) dilated. Nymphs of the coreids Chariesterus antennator (Fabricius) and Chondrocera latifornis LaPorte have both the 2nd and 3rd segments dilated; this expansion may not be as pronounced in the 2nd segment of early instar nymphs." Frank Mead
But I'm not familiar enough with antennal segments to be sure which is dilated, though I guessed only one of them, possibly the third in this image.

We attached this image to Can you take a look at that and tell us what you learned about these spiky nymphs with flattened antennae?

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