What scarabaeidae beetle has the worst adult lifespan?

[STELLAR]

Bonus points for mentioning species with very long larval lifespans!

 

[Bugboy3092]

I’d imagine it’s some kind of ruteline, but I’m not sure

 

[Garin]

Any scarab that I am trying to keep alive?

 

[PowerHobo]

Any scarab that I am trying to keep alive?

:lol:  lmao holy crap. Same, but with larvae.

I'd have to cast a second vote for the winner being some sort of Rutelinae.

 

[AlexW]

Adult Pleocoma have vestigial mouthparts; reliable sources say the grubs live 9-13 yrs (female adults can live a yr, but males are not flightless and appear to last a short time)

Unfortunately, Pleocoma was moved by hairsplitting taxonomists into its own family, so it isn't a true scarab now.

Some true scarabs are also eatless though, including at least some Cyclocephala