Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada
Clickable Guide
Moths Butterflies Flies Caterpillars Flies Dragonflies Flies Mantids Cockroaches Bees and Wasps Walkingsticks Earwigs Ants Termites Hoppers and Kin Hoppers and Kin Beetles True Bugs Fleas Grasshoppers and Kin Ticks Spiders Scorpions Centipedes Millipedes

Upcoming Events

Photos of insects and people from the Spring 2021 gathering in Louisiana, April 28-May 2

National Moth Week 2020 photos of insects and people.

Photos of insects and people from the 2019 BugGuide Gathering in Louisiana, July 25-27

Discussion, insects and people from the 2018 gathering in Virginia, July 27-29

Photos of insects and people from the 2015 gathering in Wisconsin, July 10-12

Photos of insects and people from the 2014 gathering in Virginia, June 4-7.

Photos of insects and people from the 2013 gathering in Arizona, July 25-28

Photos of insects and people from the 2012 gathering in Alabama

Toed-winged Beetle - Ptilodactyla serricollis - male

Toed-winged Beetle - Ptilodactyla serricollis - Male
Ailsa Craig, Ontario, Canada
June 30, 2004
Found on our front porch at night, I don't know the origin of the name but this is a 5 mm Toed-winged Beetle, family Ptilodactylidae. It looks like Ptilodactyla serricollis (the only species in the genus in Canada), based on a drawing in Bland's "How to Know the Insects", and photos of the genus here and here.
Note the apical spurs on the tibiae; only males have pectinate antennae.

I agree
I agree with you on genus and am moving to the new genus page.

Given that there is a record for only Ptilodactyla serricollis in Canada, you are likely right about species. It may be hard to be certain, since the key in Downie & Arnett looks unusually difficult to use.


Stephen Cresswell
Buckhannon, WV

Thanks, Stephen. I had forgotten about this one, and didn't realize there wasn't a genus page until now.
Does Downie & Arnett give distribution info for the 6 northeastern species? The 1991 Canadian Checklist (PDF doc linked to on the family page) says "The genus Ptilodactyla needs to be revised but new species are not likely to be discovered in Canada." Do you know whether any of the 6 species are recent splits from previously known species? If not, I'm guessing that at least some of them have restricted distributions - maybe even endemic to the northeastern US - if only 1 of the 6 makes it into Canada.

Beetle ranges
Downie & Arnett are nice enough to include listings for all nine species of Ptilodactyla they say inhabit America north of Mexico. You're right, some have restricted ranges, or at least, they barely range into the U.S. They note only a Texas record for P. equilobata, for example, and only a Texas record for P. hyperglotta.

Their records match the data you have for Canada, namely, a record for P. serricollis only (listed with an Ontario record plus eleven states).

I don't know the history of various rearrangements of Ptilodactyla, and Downie & Arnett don't address that.


Stephen Cresswell
Buckhannon, WV

Comment viewing options
Select your preferred way to display the comments and click 'Save settings' to activate your changes.