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Dusky Stink Bug - Euschistus

Dusky Stink Bug - Euschistus
Kokomo, Howard County, Indiana, USA
October 1, 2011
Should this nymph be marked as "adult" or "immature"?

Images of this individual: tag all
Dusky Stink Bug - Euschistus Dusky Stink Bug - Euschistus

Moved from Euschistus.


nymph is a immature individual by definition
please elaborate how the ID was obtained (adult reared?)

I've marked it as "immature".
I reached the conclusion of id by looking at every stinkbug photo on Bugguide, and this was the only one that looked like it matched. The dark row of spots on the belly and the dark antenna tips didn't look like anything else I'd seen. Do you think I might be mistaken?

i see... let's keep it at genus level --as 'probably Euschistus'
i don't believe the nymph ID's on BG are based on much more than very flimsy circumstantial evidence.
the nymphs are so poorly understood that even the leading pentatomid experts decline to identify the vast majority of them to genus, let alone species. the ONLY way to be sure is rearing.

I didn't know ...
Thank you so much for letting me know that nymphs are nearly impossible to identify without rearing to adulthood. I had assumed that my id to species was correct based on the physical appearance in the photos combined with the fact that I've seen adults in the same location at the same time of year. I really appreciate your taking the time to teach me. Thanks!

associating nymphs with adults... the exclusion of other options is the second best way to establish identity (like the 'beyond reasonable doubt' vs 'preponderance of evidence' standards applied in criminal and civil matters); here's a good example of such a reliable association:

basically, you have to make sure no other pentatomid species is breeding/feeding on the plant where the nymphs are found, and in immediate vicinity

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