Native SpeciesRiffle beetle

Coleoptera (order)
FOUND by Kingrapicsknight
ID Questioned
Quality checked by King
Peer reviewed by Sydney
Field Notes
We found 5 crayfish in the river
A sketch of our study site.
Supporting Evidence
Photo of my evidence.
Look at the riffle beetle it’s hard to miss
Photo of my evidence.
Look in the HAT
Species Observation: Species Looked For
Did you find it?: 
I think I found it
Scientific name:
Coleoptera (order)
Common name:
Riffle beetle
Sampling method: 
Photo of our sampling method.
Place Studied
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Map this species
N 45.168187 °
W -69.378301 °
Observation Site Information
A photo of our study site.
Freshwater - In a stream or river
Trip Information
Piscataquis River 2018
Trip date: 
Wed, 2018-09-12 09:30
Town or city: 
Type of investigation: 
Species Survey
MIDAS Code: 


Hello there!

Thanks so much for uploading this observation! And your photos are wonderful and very clear -- great work uploading such a thorough and detailed observation!

However, I'm not sure if it's a riffle beetle. This specimen seems to have too many horizontal ridges on its back. It's also lacking the "strong vertical line" you often see running up and down a riffle beetle (actually, any beetle), which is the break between the two wing coatings.

Take a peek at these Google images to see what that vertical dividing line looks like on riffle beetles:

What're your thoughts? I'm really impressed by your observation here (and your Megaloptera one, too!!), so great work. Keep it up!!

Yours in a love of bugs,

Thx for the reply we will get on that.