I was just looking at some photos of Migneauxia and thought immediately of this specimen photo. I have no experience with this genus, but here is a key to genera in german that can distinguish the genus from Corticaria or Corticarina, which might be the closest based on this photo:

• 10-segmented antenna; pronotum short and broad, strongly serrated on the sides; second tarsomere shorter than the first (not sure whether refers to pro-meso-or meta- tarsi) --> Migneauxia
• 11 segmented antenna --> Melanophthalma, Corticaria, Corticarina,etc...

The description of Migneauxia orientalis which translated lists these features:

• 10 segmented antenna with 3 segmented antennal club
• pronotum strongly toothed with strong shoulders
• Length 1.2 - 1.5mm
• yellowish color
• Pronotum transverse, not quite as wide as the elytra at their greatest width
• ?something about a rough pronotum???

I think that having very strong pronotal teeth and 10-segmented antennae is a key feature in the genus. I don't think the genus is recorded yet in NA, so I want to be cautious and just put this out for others to consider. Since we still have little expertise in this group here in NA, I wouldn't be surprised of a finding such as that. Wolfgang Rücker has 11 species of this genus in the world checklist. This might be a specimen worth having a ventral shot if possible also. Below is a photo of Migneauxia lederi by Marko Mutanen that initially brought me to consider this genus...

"I would regard these as Migneauxia lederi Reitter." He says this species is cosmopolitan and quite large, but absolute confirmation would be made with dissection and examination of the aedeagus.

"Due to the form of the pronotum, this can be assigned to Migneauxia unequivocally."

"This species is very variable in size, form of the pronotum, etc... You will find this Migneauxia worldwide."


Indeed, Fred Andrews recorded the genus new to NA in 1989- with records of this species from Southern US- your record is a nice range extension. Were you collecting in an arid area?

Great find Anthony!

This beetle came either from an Urban Garden or Vacant Lot in heavily urbanized Cleveland, which may "act" like an arid habitat. I have someone helping with Carabid IDs and he has commented on at least a few that they are typically found in xeric habitats. Thank you very much for your keen eye in picking this guy out as Migneauxia!!!

many many thanks all for the great addition!