What's That Bug? does not endorse extermination

Subject: Large black bug in North Brazil
Location: North Brazil
February 24, 2014 5:19 am
Hello! I am really struggling to find out what species of beetle I have seen. It was very large (the size of my palm) but isn’t a titan beetle. It was black with very long antennae and sharp mandibles which the guide said was used to cut through wood, and it made a horrendous noise when it was picked up.
Here’s hoping you can help!
Signature: Poppy

blurry image of beetle:  Longicorn

blurry image of beetle: Longicorn

these images are too tiny and the detail is too poor to provide species information.  Do you have larger files?

Only the two attached I’m afraid – it’s really low res!
Poppy Riddle

Might it be a type of root borer beetle? My friend has sent me some better res images of it!



Hi Again Poppy,
Thanks for sending the much better resolution images.  This is definitely a Longicorn in the family Cerambycidae, and we are also confident that it is in the subfamily Prioninae, the Root Borers.  We are creating a posting and we will attempt a species identification, however, this will need to wait until later as we must dash off to work.

Root Borer

Root Borer

Thank-you! I think the fact it was found in Northern Brazil keeps throwing me. I don’t know of any that look like that in that area?

Hi again Poppy,
It looks like it might be a male
Ctenoscelis acanthopus which is pictured on the Worldwide Cerambycidae Photo Gallery and on Insects and More.



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What's That Bug? does not endorse extermination
Location: North Brazil

2 Responses to Longicorn from Brazil

  1. Cesar Crash says:

    I belive you are correct in Ctenoscelis, but I think that C. acanthopus http://www.insetologia.com.br/2013/02/serra-pau-em-sao-paulo_9.html is a southern species. Northern species are C. ater and C. coeus http://www.insetologia.com.br/2013/11/serra-pau-ctenoscelis-no-amazonas.html, I believe you got the second one, but not sure.

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