What's That Bug? does not endorse extermination

Fri, Feb 13, 2009 at 10:32 AM
This impressive colorful bug was found in a park , near home, where a i use to make some shots of bugs.. Lokkas a weevil, any could say more?
Thanks a lot

Unknown Blue Weevil

Blue Weevil:  Polyteles coelestina

Dear Brutamonte,
We believe we have received an image of this gorgeous blue Weevil from Brazil at least once before, but we were not successful in properly identifying it. We do know that it is a Weevil, a type of Beetle. Hopefully, one of our readers will be able to assist us in a proper identification.


Unknown Blue Weevil

Actually the Weevil we posted in January 2008 is a very different Blue Species.

Update: Unknown Blue Weevil from Brazil
Tue, Feb 24, 2009 at 9:22 AM
Hi Daniel:
You would think that such a striking creature would be relatively easy to track down – but not so. The weevils are a truly enormous and diverse family of coleopterans and, as often happens in taxonomy, the position and naming of this one has changed a bewildering number of times. Thanks to several wonderfully descriptive accounts from the 1800s, the golden age of bug collection, I was able to follow a trail forward that led to the modern genus Ericydeus (Curculionidae : Polydrosinae: Naupactini). There are approximately 16 species in the genus, 2 from North America and the rest from Central and South America. I believe Brutamorte’s weevil is E. sedecimpunctatus, based on early descriptions and reported distribution (throughout central Brazil), but I can’t be certain. The link provided is for a closely related species, E.  schonherri; a specimen collected in French Guyana. Regards.

Update from Karl
August 6, 2009
Catching up on weevils (3 in 1 – sorry about that)
Hi Daniel:
The first part of this is just FYI – a great internet resource. I found a little time to go back and catch up on some wonderful weevils that caught my attention as they were posted.  One of my favorite resources for this sort of thing is the digitized version of the Biologia Centrali-Americana (58 volumes!). It is a little difficult to navigate through, but what an incredible storehouse of information! The volumes on insects were originally produced between 1879-1915, but they still stand up as an incredible body of work. The two Costa Rican weevils were identified from this site. Cheers.  K

Re: Unknown Blue Weevil from Brazil (Brilliant) – Feb 13, 2009
I didn’t plan to revisit this one, but I have another update (or perhaps and alternate identification). I stumbled upon this image of a weevil specimen from the Natural History Museum in Vienna and it appears to be the very same as the one posted by Brutamonte. The name is given as Polyteles coelestina (Curculionidae: Entiminae). Unfortunately, I was unable to find any more information about it and I am not fully convinced that the identification is correct. It certainly wouldn’t be the first time that an old museum specimen was misidentified. Regards.

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

4 Responses to Blue Weevil from Brazil is Polyteles coelestina

  1. Weeeeevil says:

    The weevil at Natural History Museum in Vienna (photo on wiki) looks just about right to me, but based on the most recent reviews Polyteles coelestina is a synonym of Polyteles decussatus. A poorly known genus that also includes other handsome blue-and-black weevils, but it remains valid, see for example Alonso-Zarazaga & Lyal 1999 (A world catalogue of families and genera of Curculionoidea (Insecta: Coleoptera) (excepting Scolytidae and Platypodidae), and Vanin & Gaiger 2005 in Zootaxa 1053 (A cladistic analysis of the genera of the tribe Entimini (Coleoptera, Curculionidae), with description of a new genus and species from the Amazonian region).

    In contrast, some of the “Ericydeus” photos found around the net look suspiciously Polyteles to me….

  2. Cesar Crash says:

    Hello there!
    I recieved a similar specimen: http://www.insetologia.com.br/2013/11/gorgulho-em-sao-paulo.html, noticed that it is very diffused on the internet about it being an Ericydeus, I came here and found the problem about Polyteles, I published and told to Marquinhos (the photographer) that it would be very good to have a dr. Celso Godinho’s opinion about this fellow, that’s dr. Celso’s answer:
    “It really looks like an Ericydeus, but it’s not. According to some authors, it’s Polyteles coelestinus, but the valid name is Polydius coelestinus“.

    • bugman says:

      Thanks for tracking down the correct name for this Weevil Cesar. We have added the scientific name to the title of the posting.

  3. Leida Dos Santos says:

    Hey ! Thank you for this site ! I was able to identify another Blue weevil in Minas Gerais Brazil !

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