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Which Rhodobaenus? - Rhodobaenus quinquepunctatus

Which Rhodobaenus? - Rhodobaenus quinquepunctatus
Near Ruraldale, Upshur County, West Virginia, USA
June 12, 2005
I have had this captioned as Rhodobaenus tredecimpunctata since I took it two years ago. All my books show only R. tredecimpunctatus in this genus. But now that I have Stephen Marshall's new book, I see that he has a photo of R. quinquepunctatus on page 371 (image 6). His photo shows a large black apical spot on the elytra just as mine has. His image of R. tredecimpunctatus (image 7) has no red spot at the elytral apices.

Thus I am thinking this should be filed as R. quinquepunctatus, but I wonder if anyone has any other information about how to separate these two species? Color and markings aren't always the best way to make a determination as I have learned the hard way in other beetle families!

Moved from Rhodobaenus.

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