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Genus Phellopsis

Ironclad Beetle - Phellopsis obcordata Beetle  - Phellopsis porcata Phellopsis porcata? - Phellopsis porcata rock-like or dead beetle? - Phellopsis obcordata Ironclad beetle - Phellopsis obcordata Brown Stippled Beetle - Phellopsis obcordata Is this the same Phellopsis we saw before? - Phellopsis porcata Mushroom Munching Bug - Phellopsis obcordata
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga (Water, Rove, Scarab, Long-horned, Leaf and Snout Beetles)
No Taxon (Series Cucujiformia)
Superfamily Tenebrionoidea (Fungus, Bark, Darkling and Blister Beetles)
Family Zopheridae (Ironclad Beetles)
Subfamily Zopherinae (Ironclad Beetles)
Tribe Phellopsini
Genus Phellopsis
Explanation of Names
Phellopsis LeConte 1862
'bark-like'
Numbers
6 spp. total, of which 2 in our area(1)
Identification
Unlike other large Zopherinae, Phellopsis has 11-segmented antennae and slightly open procoxal cavities. The species are quite uniform.(1) In NA, one species is strictly eastern (no intertuberculate setae on the hypomeron; lateral margin of pronotum strongly bisinuate in lateral view; elytral punctures large, discal tubercles less than 1/4 diameter of puncture; posterior margin of prointercoxal process straight to weakly concave), another, strictly western (dense intertuberculate setae on the hypomeron; lateral margin of pronotum arcuate to weakly bisinuate in lateral view; elytral punctures small, discal tubercles about half the diameter of punctures; posterior margin of prointercoxal process bisinuate)(1)
Range
e. Asia and NA; in NA, from NF to MN and south along the Appalachians in the east (P. obcordata) and along the Pacific and the Rockies in the west (P. porcata)(1)
Food
Fungi associated with decaying trees in old growth boreal forests (Steiner 1992, Ivie 2002). Adults are surface feeders, while larvae burrow into the substrate.(1)
Remarks
Adults play dead ('thanatosis') to avoid predators and drop to the ground when disturbed, with appendages retracted(1)
Internet References