Which adult beetle species live the longest?

G

GoHeracross

L1
I’ve noticed a lot of beetles live only a few months as full grown adults. Which ones tend to have the longest lifespan as adults? 
Thanks!

 
Some adult tenebrionids can live for an exceptionally long time.  Some adult lucanids can survive for at least several years. 

 
As adults, I believe Phileurus truncatus can live about 2 years.  Gymnetis Thula can live about 1 year or longer if I remember correctly.

 
I haven't been able to track down any references, but a colleague once told me that certain darklings had been recorded as living for up to 20 years as adults.  He might have been talking about some of the species that have been tagged and monitored in the Namib Desert, along the southwest coast of Africa.

 
Although not really available captively bred yet, or as larvae, Blue Feigning Death beetles live for years as adults. 

 
I have gymnetis Thula and dorcus titanus beetles because they’re both supposed to be long lived. The stags hibernate to live that long, my gymnetis have not hibernate but move pretty slow this time of year. They’re all about 5-8 months old now and I hope will live longer. 

 
Goliathus said:
I haven't been able to track down any references, but a colleague once told me that certain darklings had been recorded as living for up to 20 years as adults.  He might have been talking about some of the species that have been tagged and monitored in the Namib Desert, along the southwest coast of Africa.
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I've heard some crazy longevity statements on darklings including Asbolus and Eleodes but I've kept quite a few from eclosion and 2-5 is realistic. Anything past 6 is likely entirely imagined. Phileurus 18-30 months, Dynastes tityus up to 12, Dorcus ~12 months

 
Dynastes said:
I've heard some crazy longevity statements on darklings including Asbolus and Eleodes but I've kept quite a few from eclosion and 2-5 is realistic. Anything past 6 is likely entirely imagined. Phileurus 18-30 months, Dynastes tityus up to 12, Dorcus ~12 months
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A claim of 20 years for an adult darkling does seem dubious.

 
What about living conditions don’t they change the duration of a beetles lifespan.

 
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