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Genus Pachybrachis - Scriptured Leaf Beetles

Pachybrachis sp. (EGR 6) - Pachybrachis Cryptocephalus - Pachybrachis nobilis chrysomelid from Ceratiola ericoides - Pachybrachis Pachybrachis bullatus Fall - Pachybrachis bullatus - male Pachybrachis trinotatus (Melsheimer) - Pachybrachis trinotatus - female Pachybrachis Pachybrachis? - Pachybrachis marmoratus Beetle - Pachybrachis
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Coleoptera (Beetles)
Suborder Polyphaga
No Taxon (Series Cucujiformia)
Superfamily Chrysomeloidea (Longhorn and Leaf Beetles)
Family Chrysomelidae (Leaf Beetles)
Subfamily Cryptocephalinae (Case-bearing Leaf Beetles)
Tribe Cryptocephalini
Subtribe Pachybrachina
Genus Pachybrachis (Scriptured Leaf Beetles)
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)
Size
2-6 mm
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.
(5)(6)(7)(8)
Internet References
Pachybrachis of Texas (Quinn 2018)
Works Cited
1.Pachybrachis (Coleoptera, Chrysomelidae, Cryptocephalinae) of eastern Canada
Barney et al. 2013. ZooKeys 332: 95–175.
2.American Beetles, Volume II: Polyphaga: Scarabaeoidea through Curculionoidea
Arnett, R.H., Jr., M. C. Thomas, P. E. Skelley and J. H. Frank. (eds.). 2002. CRC Press LLC, Boca Raton, FL.
3.A review of the subgenus Pachybrachis Chevrolat, 1837 s.str. of Palaearctic region (Coleoptera: Chrysomelidae: Cryptocephalinae)
Warchalowski A. 2008. Genus 19: 213-283.
4.A Manual of Common Beetles of Eastern North America
Dillon, Elizabeth S., and Dillon, Lawrence. 1961. Row, Peterson, and Company.
5.Definition and revision of the pectoralis species-group of eastern North American Pachybrachis (Chrysomelidae: Cryptocephalinae)
Barney. 2018. The Coleopterists Bulletin 72(3): 471-499.
6.Redescription of four predominantly yellow, densely punctate species of Pachybrachis of the W. USA, and Description of a New Sp.
Barney, R.J. 2020. The Coleopterists Bulletin 74(4): 637-646. .
7.A revision of the North American species of Pachybrachys
H. C. Fall. 1915. Transactions of the American Entomological Society, Vol. 41, No. 3: 291–486 .
8.Definition and revision of the viduatus species-group of North American Pachybrachis Chevrolat (Chrysomelidae: Cryptocephalinae)
Riley, E.G. and R.J. Barney. 2015. The Coleopterists Bulletin 69(1): 25–59.