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

Calendar
Upcoming Events

Photos of insects and people from the 2022 BugGuide gathering in New Mexico, July 20-24

National Moth Week was July 23-31, 2022! See moth submissions.

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

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

Photos of 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


Previous events


TaxonomyBrowse
Info
ImagesLinksBooksData

Genus Pasimachus

Pasimachus marginatus Pasimachus bettle - Pasimachus Carabidae, head, dorsal - Pasimachus elongatus Pasimachus - Pasimachus depressus New Jersey Beetle - Pasimachus depressus Pasimachus - Pasimachus elongatus Pasimachus
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Adephaga (Ground and Water Beetles)
Family Carabidae (Ground Beetles)
Subfamily Scaritinae
Tribe Pasimachini
Genus Pasimachus
Explanation of Names
Pasimachus Bonelli 1813
'total fighter'
Numbers
11 spp. in 3 species-groups (all in the nominotypical subgenus) in our area, 32 spp. in 4 subgenera total(1)
Size
21-40 mm
Identification
keys to spp. in(2)(3)(4)(5)(6)
A common difficulty is telling apart the sympatric P. depressus vs P. elongatus. The former is much more robust/broad, most with body length ≥ 28 mm vs ≤ 26 mm for most "elongatus". The most reliable external feature is the shape of the prosternal process (conical vs roundish). In P. elongatus, the male metatibia with tuft of golden hairs in distal third (lacking in male depressus)
Range
North and Middle America; in our area, most diverse in the south, with just one sp. (P. elongatus) reaching Canada (MB-AB)(1)
Habitat
Typically, leaf litter in forests
Food
caterpillars, other larval insects
Remarks
The etymology of Pasimachus: "Probably from the Greek pasi (the whole, all, very, by extension universal) and machetes (warrior, fighter) contracted [masculine]." (GBIF)
In addition, note that Pasimachus was a Dorian cavalry commander of the Peloponnesian War mentioned in Xenophon's Hellenica.
See Also
Lucanidae (easily distinguished by their geniculate clubbed antennae)