Pachybrachis

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***Pachybrachis*** er en slekt av biller som tilhører familiegruppen bladbiller (Chrysomelidae). Både larvene og de voksne (imago) er planteetere.

## Utseende
Små, forholdsvis korte, sylindriske bladbiller, vanligvis farget i gult og svart - fargen varierer fra ensfarget gult til ensfarget svart, kan ha metallglans. Kroppen er kort, og butt både foran og bak. Det siste leddet av bakkroppen er synlig bak dekkvingene. Undersiden er noe «oppsvulmet». Antennene er ganske tynne og forholdsvis lange, gjerne lengre enn kroppen hos hannene, som ellers kan kjennes på forstørrede forbein.

## Levevis
Hettebladbiller er særlig aktive i varme og solskinn. Flere arter er vanlige, mange av dem vanskelige å artsbestemme. Opplysninger om næringsplanten kan være til nyttige for en sikrere artsbetemmelse. Mange av artene lever på løvtrær. De voksne besøker også blomster for å ete pollen.

## Utbredelse
Slekten har flest arter i Amerika, mesteparten av de andre lever i den palearktiske sone.

## Systematisk inndeling

* orden **[[biller]]** (Coleoptera)
** underorden **[[Polyphaga]]**
*** overfamilie **[[Chrysomeloidea]]** Latreille, 1802 (=Phytophaga) 
**** familien  bladbiller (Chrysomelidae Latreille, 1802) 
***** underfamilien **[[Hettebladbiller]]**, Cryptocephalinae Gyllenhal, 1813
******* understamme Pachybrachina
******** Slekten ***Pachybrachis*** Chevrolat *in* Dejean, 1836
### Liste (ufullstendig) over artene
* *[[Pachybrachis abdominalis]]* (Bloch & Schneider, 1801)
* *[[Pachybrachis adspersa]]* Suffrian, 1866
* *[[Pachybrachis alacris]]* Fall, 1915
* *[[Pachybrachis alpinus]]* Rapilly, 1982
* *[[Pachybrachis alticola]]* Fall, 1915
* *[[Pachybrachis analis]]* (Bloch, 1787)
* *[[Pachybrachis anoguttatus]]* Suffrian, 1866
* *[[Pachybrachis antigae]]* Weise, 1900
* *[[Pachybrachis aragonicus]]* Tempere & Rapilly, 1981
* *[[Pachybrachis arizonensis]]* Bowditch, 1909
* *[[Pachybrachis assiettae]]* Burlini, 1968
* *[[Pachybrachis atomarius]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis autolycus]]* Fall, 1915
* *[[Pachybrachis azureus]]* Suffrian, 1848
* *[[Pachybrachis badius]]* Fall, 1915
* *[[Pachybrachis baeticus]]* Weise, 1882
* *[[Pachybrachis bajulus]]* Suffrian, 1852
* *[[Pachybrachis bivittatus]]* (Linnaeus, 1758)
* *[[Pachybrachis bloxham]]* (A. Bloxam, 1827)
* *[[Pachybrachis brevicollis]]* J. L. LeConte, 1880
* *[[Pachybrachis brevicornis]]* Fall, 1915
* *[[Pachybrachis brunneus]]* (Günther, 1870)
* *[[Pachybrachis bullatus]]* Fall, 1915
* *[[Pachybrachis burlinii]]* Daccordi & Ruffo, 1971
* *[[Pachybrachis caelatus]]* (Valenciennes, 1840)
* *[[Pachybrachis calcaratus]]* Fall, 1915
* *[[Pachybrachis calidus]]* Fall, 1915
* *[[Pachybrachis californicus]]* Fall, 1915
* *[[Pachybrachis canigouensis]]* Lambelet, 2005
* *[[Pachybrachis carbonarius]]* Haldeman, 1849
* *[[Pachybrachis carolinensis]]* Bowditch, 1910
* *[[Pachybrachis carpathicus]]* Rey, 1883
* *[[Pachybrachis catalonicus]]* Burlini, 1968
* *[[Pachybrachis cephalicus]]* Fall, 1915
* *[[Pachybrachis chaoticus]]* Fall, 1915
* *[[Pachybrachis chester]]* 
* *[[Pachybrachis cinctus]]* Suffrian, 1848
* *[[Pachybrachis circumcinctus]]* (Schreber, 1775)
* *[[Pachybrachis coloradensis]]* Jacq.
* *[[Pachybrachis confederatus]]* Fall, 1915
* *[[Pachybrachis conformis]]* Suffrian, 1852
* *[[Pachybrachis confusus]]* Bowditch, 1909
* *[[Pachybrachis congener]]* Suffrian, 1866
* *[[Pachybrachis connexus]]* Fall, 1915
* *[[Pachybrachis consimilis]]* Fall, 1915
* *[[Pachybrachis conspirator]]* Fall, 1915
* *[[Pachybrachis contractifrons]]* Fall, 1915
* *[[Pachybrachis convictus]]* Günther, 1864
* *[[Pachybrachis crassus]]* Bowditch, 1909
* *[[Pachybrachis creticus]]* Weise, 1886
* *[[Pachybrachis cribricollis]]* Pic, 1907
* *[[Pachybrachis croftus]]* Bowditch, 1909
* *[[Pachybrachis cruentus]]* J. L. LeConte, 1880
* *[[Pachybrachis cylindricus]]* Bowditch, 1909
* *[[Pachybrachis danieli]]* Burlini, 1968
* *[[Pachybrachis deceptor]]* 
* *[[Pachybrachis delumbis]]* Fall, 1915
* *[[Pachybrachis densus]]* Bowditch, 1909
* *[[Pachybrachis desertus]]* Fall, 1915
* *[[Pachybrachis dilatatus]]* Suffrian, 1852
* *[[Pachybrachis discoideus]]* Bowditch, 1909
* *[[Pachybrachis diversus]]* Allen & Randall, 1993
* *[[Pachybrachis donneri]]* Gosse, 1851
* *[[Pachybrachis dubiosus]]* (Cuvier, 1830)
* *[[Pachybrachis duryi]]* Fall, 1915
* *[[Pachybrachis eburifer]]* Suffrian, 1866
* *[[Pachybrachis elegans]]* Graells, 1851
* *[[Pachybrachis excisus]]* Weise, 1897
* *[[Pachybrachis exclusus]]* Rey, 1883
* *[[Pachybrachis falli]]* Leng, 1920
* *[[Pachybrachis femoratus]]* (Olivier, 1808)
* *[[Pachybrachis fimbriolatus]]* Suffrian, 1848
* *[[Pachybrachis flexuosus]]* Weise, 1882
* *[[Pachybrachis fortis]]* Fall, 1915
* *[[Pachybrachis fractus]]* Fall, 1915
* *[[Pachybrachis fraudolentus]]* G.Muller, 1955
* *[[Pachybrachis freyi]]* Burlini, 1957
* *[[Pachybrachis fulvipes]]* Suffrian, 1848
* *[[Pachybrachis fuscipes]]* Fall, 1915
* *[[Pachybrachis gracilipes]]* Fall, 1915
* *[[Pachybrachis haematodes]]* Suffrian, 1852
* *[[Pachybrachis hector]]* Fall, 1915
* *[[Pachybrachis hepaticus]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis hieroglyphicus]]* (Laicharting, 1781)
* *[[Pachybrachis hippophaes]]* Suffrian, 1848
* *[[Pachybrachis holerorum]]* Montagna & Sassi
* *[[Pachybrachis hybridus]]* Suffrian, 1852
* *[[Pachybrachis illectus]]* Fall, 1915
* *[[Pachybrachis immaculatus]]* (Bloch & Schneider, 1801)
* *[[Pachybrachis impurus]]* Suffrian, 1852
* *[[Pachybrachis infaustus]]* Haldeman, 1849
* *[[Pachybrachis insidiosus]]* Fall, 1915
* *[[Pachybrachis integratus]]* Fall, 1915
* *[[Pachybrachis jacobyi]]* Soto-Adames & Taylor
* *[[Pachybrachis karamani]]* Weise, 1893
* *[[Pachybrachis kentuckyensis]]* 
* *[[Pachybrachis korbi]]* Weise, 1891
* *[[Pachybrachis kraatzi]]* Weise, 1882
* *[[Pachybrachis lachrymosus]]* Fall, 1915
* *[[Pachybrachis laetificus]]* Marseul, 1875
* *[[Pachybrachis laevis]]* Bowditch, 1909
* *[[Pachybrachis latithorax]]* Clavareau, 1913
* *[[Pachybrachis leonardii]]* Sassi & Scholler, 2003
* *[[Pachybrachis liebecki]]* Fall, 1915
* *[[Pachybrachis limbatus]]* (Menetries, 1836)
* *[[Pachybrachis lindbergi]]* Burlini, 1963
* *[[Pachybrachis lineolatus]]* Suffrian, 1848
* *[[Pachybrachis litigiosus]]* Suffrian, 1852
* *[[Pachybrachis livens]]* J. L. LeConte, 1858
* *[[Pachybrachis lodingi]]* Bowditch, 1909
* *[[Pachybrachis longus]]* Bowditch, 1909
* *[[Pachybrachis luctuosus]]* Suffrian, 1858
* *[[Pachybrachis luridus]]* (Fabricius, 1798)
* *[[Pachybrachis lustrans]]* J. L. LeConte, 1880
* *[[Pachybrachis m-nigrum]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis macronychus]]* (Germar, 1824)
* *[[Pachybrachis marginatus]]* Bowditch, 1909
* *[[Pachybrachis marginipennis]]* Bowditch, 1909
* *[[Pachybrachis marmoratus]]* Jacoby, 1889
* *[[Pachybrachis melanostictus]]* Suffrian, 1852
* *[[Pachybrachis mellitus]]* Trewavas, 1935
* *[[Pachybrachis mercurialis]]* Fall, 1915
* *[[Pachybrachis microps]]* Fall, 1915
* *[[Pachybrachis minor]]* (Linnaeus)
* *[[Pachybrachis mitis]]* (Jacq.) Gaudich. ex Griseb.
* *[[Pachybrachis mobilis]]* Fall, 1915
* *[[Pachybrachis morosus]]* Simon, 1886
* *[[Pachybrachis nero]]* (Cuvier, 1832)
* *[[Pachybrachis nigricornis]]* (Say, 1824)
* *[[Pachybrachis nigropunctatus]]* Suffrian, 1854
* *[[Pachybrachis nobilis]]* Fall, 1915
* *[[Pachybrachis nogalicus]]* Fall, 1915
* *[[Pachybrachis notatus]]* Bowditch, 1910
* *[[Pachybrachis nubigenus]]* Fall, 1915
* *[[Pachybrachis nubilis]]* Bowditch, 1909
* *[[Pachybrachis nunenmacheri]]* Fall, 1915
* *[[Pachybrachis obfuscatus]]* Fall, 1915
* *[[Pachybrachis obsoletus]]* Suffrian, 1852
* *[[Pachybrachis osceola]]* Fall, 1915
* *[[Pachybrachis osellai]]* Daccordi & Ruffo, 1975
* *[[Pachybrachis othonus]]* (Say, 1825)
* *[[Pachybrachis pagana]]* (Olivier, 1808)
* *[[Pachybrachis pallidulus]]* Suffrian, 1851
* *[[Pachybrachis parvinotatus]]* Fall, 1915
* *[[Pachybrachis pawnee]]* (Bloch & Schneider, 1801)
* *[[Pachybrachis peccans]]* Suffrian, 1852
* *[[Pachybrachis pectoralis]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis petitpierrei]]* Daccordi, 1976
* *[[Pachybrachis petronius]]* Fall, 1915
* *[[Pachybrachis picturatus]]* (Ayres, 1855)
* *[[Pachybrachis picus]]* Weise, 1882
* *[[Pachybrachis pinguescens]]* Fall, 1915
* *[[Pachybrachis pinicola]]* Medvedev in Rouse and Medvedev, 1972
* *[[Pachybrachis placidus]]* Fall, 1915
* *[[Pachybrachis planifrons]]* Wagner, 1927
* *[[Pachybrachis pluripunctatus]]* Fall, 1915
* *[[Pachybrachis postfasciatus]]* Fall, 1915
* *[[Pachybrachis pradensis]]* Marseul, 1875
* *[[Pachybrachis praeclarus]]* Weise, 1913
* *[[Pachybrachis precarius]]* Fall, 1915
* *[[Pachybrachis prosopis]]* Fall, 1915
* *[[Pachybrachis proximus]]* Bowditch, 1909
* *[[Pachybrachis pteromelas]]* Graells, 1858
* *[[Pachybrachis pulvinatus]]* Suffrian, 1852
* *[[Pachybrachis punctatus]]* Bowditch, 1909
* *[[Pachybrachis puncticollis]]* Bowditch, 1909
* *[[Pachybrachis punicus]]* Fall, 1915
* *[[Pachybrachis purus]]* Fall, 1915
* *[[Pachybrachis pusillus]]* Bowditch, 1909
* *[[Pachybrachis quadratus]]* Fall, 1915
* *[[Pachybrachis quadricollis]]* Suffrian, 1866
* *[[Pachybrachis quadrioculatus]]* Fall, 1915
* *[[Pachybrachis regius]]* Schaufuss, 1862
* *[[Pachybrachis relictus]]* Fall, 1915
* *[[Pachybrachis roboris]]* Fall, 1915
* *[[Pachybrachis rondanus]]* Burlini, 1968
* *[[Pachybrachis ruffoi]]* Burlini, 1956
* *[[Pachybrachis rugifer]]* Abeille de Perrin, 1905
* *[[Pachybrachis salfii]]* Burlini, 1957
* *[[Pachybrachis sanrita]]* Bowditch, 1909
* *[[Pachybrachis scripticollis]]* Faldermann, 1837
* *[[Pachybrachis scriptidorsum]]* Marseul, 1875
* *[[Pachybrachis scriptus]]* Herrich-Schäffer, 1838
* *[[Pachybrachis siculus]]* Weise, 1891
* *[[Pachybrachis signatifrons]]* Mannerheim, 1843
* *[[Pachybrachis signatus]]* Bowditch, 1909
* *[[Pachybrachis simius]]* Marseul, 1875
* *[[Pachybrachis sinuatus]]* Mulsant & Rey, 1859
* *[[Pachybrachis snowi]]* Bowditch, 1909
* *[[Pachybrachis sonorensis]]* Jacoby, 1889
* *[[Pachybrachis spumarius]]* Suffrian, 1852
* *[[Pachybrachis stygicus]]* Fall, 1915
* *[[Pachybrachis subfasciatus]]* (J. E. LeConte, 1824)
* *[[Pachybrachis sublimatus]]* Fall, 1915
* *[[Pachybrachis subvittatus]]* J. L. LeConte, 1880
* *[[Pachybrachis suffrianii]]* Schaufuss, 1862
* *[[Pachybrachis suturalis]]* (Weise, 1882)
* *[[Pachybrachis tacitus]]* Moore, 1988
* *[[Pachybrachis terminalis]]* Suffrian, 1849
* *[[Pachybrachis tessellatus]]* (Olivier, 1791)
* *[[Pachybrachis testaceus]]* Perris, 1865
* *[[Pachybrachis texanus]]* Bowditch, 1909
* *[[Pachybrachis thoracicus]]* (Linnaeus, 1758)
* *[[Pachybrachis tridens]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis trinotatus]]* (F. E. Melsheimer, 1847)
* *[[Pachybrachis truncatus]]* Bowditch, 1909
* *[[Pachybrachis tumidus]]* Bowditch, 1909
* *[[Pachybrachis turbidus]]* 
* *[[Pachybrachis turgidicollis]]* Fall, 1915
* *[[Pachybrachis tybeensis]]* Fall, 1915
* *[[Pachybrachis umbraculatus]]* Guenée, 1868
* *[[Pachybrachis uncinatus]]* Fall, 1915
* *[[Pachybrachis uteanus]]* Dejean
* *[[Pachybrachis vacillatus]]* Fall, 1915
* *[[Pachybrachis varians]]* Bowditch, 1909
* *[[Pachybrachis varicolor]]* Suffrian, 1852
* *[[Pachybrachis vau]]* (Denis & Schiffermüller, 1775)
* *[[Pachybrachis vermicularis]]* Suffrian, 1854
* *[[Pachybrachis vestigialis]]* Fall, 1915
* *[[Pachybrachis viduatus]]* (Zetterstedt, 1838)
* *[[Pachybrachis viedmai]]* Burlini, 1968
* *[[Pachybrachis virgatus]]* Kunth
* *[[Pachybrachis vulnerosus]]* Fall, 1915
* *[[Pachybrachis wenzeli]]* Fall, 1915
* *[[Pachybrachis wickhami]]* Bowditch, 1909
* *[[Pachybrachis xantholucens]]* Fall, 1915
* *[[Pachybrachis xanti]]* Gill, 1860

## Eksterne lenker
* Nettside om slekten
* bugguide.net - utbredelsesdatabase over nordamerikanske insekter
*