Synonyms and other taxonomic changes
Pachybrachys Mannerheim 1843 (unjustified emendation)
Explanation of Names
Pachybrachis Chevrolat in Dejean 1836
Numbers
>150 spp. in our area, (17 in e. Canada
(1)), ~200 in the New World (all in the nominate subgenus), ~360 in 2 subgenera worldwide (the second subgenus contains a handful of spp. restricted to w. Mediterranean)
(2)(3)Identification
pronotum margined at base, w/o lateral grooves for antennae; profemora thicker than metafemora; claws simple
(4); most species are difficult to separate without dissection
Range
largely holarctic, with some representation to the south
(3); in NA, much more diverse in the south and the drier western/southwestern areas
(2)Food
foliage of a variety of plants, incl. trees such as hickory, willow; adults also reported to eat pollen
Life Cycle
Larvae case-bearing, often gregarious. Pupae attached to stems and leaves with no cocoons. Typically adults emerge in late summer, overwinter, and disperse in spring or late summer.
Print References
Barney, R.J. 2016a. Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae) endemic to Florida, including descriptions of four new species. The Coleopterists Bulletin 70(1): 31-52.
Barney, R.J. 2016b. Definition and revision of the othonus species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae). The Coleopterists Bulletin 70(3): 569-605.
Barney, R.J. 2017a. Definition and revision of the luridus species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae). The Coleopterists Bulletin 71(1): 1-45.
Barney, R.J. 2017b. Definition and revision of the spumarius species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae). The Coleopterists Bulletin 71(3): 449-460.
Barney, R.J. 2018a. Definition and revision of the atomarius species-group of North American Pachybrachis Chevrolat (Coleoptera: Chrysomelidae: Cryptocephalinae), including descriptions of nine new species. The Coleopterists Bulletin 72(1): 9-74.
