Pachybrachis
# Pachybrachis

Pachybrachis es un género de escarabajos de hoja, Chrysomelidae, de la tribu Cryptocephalini de la subfamilia Cryptocephalinae y pertenece al grupo de barrenadores de la nuez llamado Camptosomata.
Está compuesto por 350 especies, de las cuales 200 habitan el hemisferio Norte y el resto tiene distribución Paleártica. La mayor cantidad de especies fue descrita en la segunda mitad del siglo XX, particularmente a partir del trabajo de Burlini, quien clasificó más de 50 especies de este género.

# Pachybrachis
## Especies

* Pachybrachis abdominalis Say 1824
* Pachybrachis alacris Fall 1915
* Pachybrachis alticola Fall 1915
* Pachybrachis analis LeConte 1861
* Pachybrachis anoguttatus Suffrian, 1866
* Pachybrachis antigae Weise, 1890
* Pachybrachis arizonensis Bowditch 1909
* Pachybrachis autolycus Fall 1915
* Pachybrachis azureus Suffrian, 1848
* Pachybrachis badius Fall 1915
* Pachybrachis baeticus Weise, 1882
* Pachybrachis bajulus Suffrian 1852
* Pachybrachis bivittatus Say 1824
* Pachybrachis brevicollis LeConte 1880
* Pachybrachis brevicornis Fall 1915
* Pachybrachis brunneus Bowditch 1909
* Pachybrachis bullatus Fall 1915
* Pachybrachis caelatus LeConte 1858
* Pachybrachis calcaratus Fall 1915
* Pachybrachis calidus Fall 1915
* Pachybrachis californicus Fall 1915
* Pachybrachis carbonarius Haldeman 1849
* Pachybrachis carolinensis Bowditch 1910
* Pachybrachis carpathicus Rey, 1883
* Pachybrachis cephalicus Fall 1915
* Pachybrachis chaoticus Fall 1915
* Pachybrachis cinctus Suffrian, 1848
* Pachybrachis circumcinctus Crotch 1874
* Pachybrachis coloradensis Bowditch 1909
* Pachybrachis confederatus Fall 1915
* Pachybrachis conformis Suffrian 1852
* Pachybrachis confusus Bowditch 1909
* Pachybrachis connexus Fall 1915
* Pachybrachis consimilis Fall 1915
* Pachybrachis conspirator Fall 1915
* Pachybrachis contractifrons Fall 1915
* Pachybrachis convictus Fall 1915
* Pachybrachis crassus Bowditch 1909
* Pachybrachis creticus Weise, 1886
* Pachybrachis cribricollis Pic, 1907
* Pachybrachis croftus Bowditch 1909
* Pachybrachis cruentus LeConte 1880
* Pachybrachis cylindricus Bowditch 1909
* Pachybrachis delumbis Fall 1915
* Pachybrachis densus Bowditch 1909
* Pachybrachis desertus Fall 1915
* Pachybrachis dilatatus Suffrian 1852
* Pachybrachis discoideus Bowditch 1909
* Pachybrachis diversus Fall 1915
* Pachybrachis donneri Crotch 1874
* Pachybrachis dubiosus LeConte 1880
* Pachybrachis duryi Fall 1915
* Pachybrachis elegans Graells, 1851
* Pachybrachis excisus Weise, 1887
* Pachybrachis exclusus Rey, 1883
* Pachybrachis falli Leng 1920
* Pachybrachis femoratus Olivier 1808
* Pachybrachis flexuosus Weise, 1882
* Pachybrachis fortis Fall 1915
* Pachybrachis fractus Fall 1915
* Pachybrachis fulvipes Suffrian, 1848
* Pachybrachis fuscipes Fall 1915
* Pachybrachis gracilipes Fall 1915
* Pachybrachis haematodes Suffrian 1852
* Pachybrachis hepaticus Melsheimer 1847
* Pachybrachis hybridus Suffrian 1852
* Pachybrachis illectus Fall 1915
* Pachybrachis immaculatus Jacoby 1889
* Pachybrachis impurus Suffrian 1852
* Pachybrachis infaustus Haldeman 1849
* Pachybrachis insidiosus Fall 1915
* Pachybrachis integratus Fall 1915
* Pachybrachis jacobyi Bowditch 1909
* Pachybrachis karamani Weise, 1893
* 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 liebecki Fall 1915
* Pachybrachis limbatus Ménétriés, 1836
* Pachybrachis lineolatus Suffrian, 1848
* Pachybrachis litigiosus Suffrian 1852
* Pachybrachis livens LeConte 1858
* Pachybrachis lodingi Bowditch 1909
* Pachybrachis longus Bowditch 1909
* Pachybrachis luctuosus Suffrian 1858
* Pachybrachis luridus Fabricius 1798
* Pachybrachis lustrans LeConte 1880
* Pachybrachis m-nigrum Melsheimer 1847
* Pachybrachis macronychus Fall 1915
* Pachybrachis marginatus Bowditch 1909
* Pachybrachis marginipennis Bowditch 1909
* Pachybrachis marmoratus Jacoby 1889
* Pachybrachis melanostictus Suffrian 1852
* Pachybrachis mellitus Bowditch 1909
* Pachybrachis mercurialis Fall 1915
* Pachybrachis microps Fall 1915
* Pachybrachis minor Bowditch 1909
* Pachybrachis mitis Fall 1915
* Pachybrachis mobilis Fall 1915
* Pachybrachis morosus Haldeman 1849
* Pachybrachis nero Bowditch 1909
* Pachybrachis nigropunctatus Suffrian, 1854
* Pachybrachis nigricornis Say 1824
* Pachybrachis nobilis Fall 1915
* Pachybrachis nogalicus Fall 1915
* Pachybrachis notatus Bowditch 1910
* Pachybrachis nubigenus Fall 1915
* Pachybrachis nubilus Bowditch 1909
* Pachybrachis nunenmacheri Fall 1915
* Pachybrachis obfuscatus Fall 1915
* Pachybrachis obsoletus Suffrian 1852
* Pachybrachis osceola Fall 1915
* Pachybrachis othonus Say 1825
* Pachybrachis pallidulus Suffrian, 1851
* Pachybrachis parvinotatus Fall 1915
* Pachybrachis pawnee Fall 1915
* Pachybrachis peccans Suffrian 1852
* Pachybrachis pectoralis Melsheimer 1847
* Pachybrachis petronius Fall 1915
* Pachybrachis picturatus Germar 1824
* Pachybrachis picus Weise, 1882
* Pachybrachis pinguescens Fall 1915
* Pachybrachis placidus Fall 1915
* 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 punicus Fall 1915
* Pachybrachis purus Fall 1915
* Pachybrachis pusillus Bowditch 1909
* Pachybrachis quadratus Fall 1915
* Pachybrachis quadrioculatus Fall 1915
* Pachybrachis regius Schaufuss, 1862
* Pachybrachis relictus Fall 1915
* Pachybrachis roboris Fall 1915
* Pachybrachis rugifer Abeille, 1904
* Pachybrachis sanrita Bowditch 1909
* Pachybrachis scripticollis Faldermann, 1837
* Pachybrachis scriptidorsum Marseul, 1875
* Pachybrachis scriptus Herrich-Schaeffer, 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 Leconte 1824
* Pachybrachis sublimatus Fall 1915
* Pachybrachis subvittatus LeConte 1880
* Pachybrachis suffrianii Schaufuss, 1862
* Pachybrachis tacitus Fall 1915
* Pachybrachis terminalis Suffrian, 1849
* Pachybrachis tessellatus Olivier, 1791
* Pachybrachis testaceus Perris, 1865
* Pachybrachis texanus Bowditch 1909
* Pachybrachis thoracicus Jacoby 1889
* Pachybrachis tridens Melsheimer 1847
* Pachybrachis trinotatus Melsheimer 1847
* Pachybrachis truncatus Bowditch 1909
* Pachybrachis tumidus Bowditch 1909
* Pachybrachis turbidus LeConte 1880
* Pachybrachis turgidicollis Fall 1915
* Pachybrachis tybeensis Fall 1915
* Pachybrachis umbraculatus Suffrian 1852
* Pachybrachis uncinatus Fall 1915
* Pachybrachis uteanus Fall 1915
* Pachybrachis vacillatus Fall 1915
* Pachybrachis varians Bowditch 1909
* Pachybrachis varicolor Suffrian 1852
* Pachybrachis vau Fall 1915
* Pachybrachis vermicularis Suffrian, 1854
* Pachybrachis vestigialis Fall 1915
* Pachybrachis viduatus Fabricius 1801
* Pachybrachis virgatus LeConte 1880
* Pachybrachis vulnerosus Fall 1915
* Pachybrachis wenzeli Fall 1915
* Pachybrachis wickhami Bowditch 1909
* Pachybrachis xantholucens Fall 1915
* Pachybrachis xanti Crotch 1873

# Pachybrachis
## Especies
### Posteriores a 1950

* Pachybrachis absinthii Lopatin, 1990
* Pachybrachis additus Lopatin, 1991
* Pachybrachis alcantarensis De la Rosa, 2012
* Pachybrachis alpinus Rapilly, 1982
* Pachybrachis anatolicus Lopatin, 1985
* Pachybrachis aragonicus Tempère & Rapilly, 1981
* Pachybrachis boreopersicus Lopatin, 1991
* Pachybrachis burlinii Daccordi & Ruffo, 1971
* Pachybrachis canigouensis Lambelet, 2005
* Pachybrachis catalonicus Burlini, 1968
* Pachybrachis cordatus Sassi & Schoeller, 2003
* Pachybrachis danieli Burlini, 1968
* Pachybrachis dimorphus Medvedev, 1978
* Pachybrachis fraudator Lopatin, 1991
* Pachybrachis fraudolentus Müller, 1955
* Pachybrachis freidbergi Lopatin, 1994
* Pachybrachis freyi Burlini, 1957
* Pachybrachis heptapotamicus Lopatin, 1997
* Pachybrachis jastschenkoi Lopatin, 1995
* Pachybrachis jordanicus Lopatin, 1984
* Pachybrachis kaplini Lopatin, 1986
* Pachybrachis koktumensis Lopatin, 1991
* Pachybrachis korotjaevi Lopatin, 1995
* Pachybrachis leonardii Sassi & Schöller, 2003
* Pachybrachis lindbergi Burlini, 1963
* Pachybrachis lopatini Medvedev & Rybakova, 1980
* Pachybrachis marki Lopatin, 1997
* Pachybrachis mitjaevi Lopatin & Kulenova, 1982
* Pachybrachis mogol Lopatin, 1986
* Pachybrachis mongolensis Medvedev & Rybakova, 1980
* Pachybrachis petitpierrei Daccordi, 1976
* Pachybrachis planifrons Wagner, 1972
* Pachybrachis potanini Medvedev & Rybakova, 1980
* Pachybrachis pudicus Lopatin, 1984
* Pachybrachis rapillyi Lopatin, 1984
* Pachybrachis rondanus Burlini, 1968
* Pachybrachis ruffoi Burlini, 1956
* Pachybrachis salfii Lopatin, 1984
* Pachybrachis saudicus Lopatin, 1979
* Pachybrachis semidesertus Lopatin en Lopatin & Konstantinov, 1994
* Pachybrachis sinkianensis Lopatin, 1995
* Pachybrachis steinhauseni Schoeller, 2005
* Pachybrachis tekensis Lopatin, 1983
* Pachybrachis velarum Warchalowski, 1998
* Pachybrachis viedmai Burlini, 1968