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Timarcha er en slekt av biller i delgruppen (underfamilien) Chrysomelinae.
Utseende Forholdsvis store og kraftige, brede og høyt hvelvede, halvblanke, svarte bladbiller, kan ha avdempet metallglans.
Levevis Timarcha-artene er store og tunge biller med tykt skall, De har reduserte flygevinger, kan ikke fly, og er generelt trege. De kan dermed ikke lett unnslippe rovdyr, men forsvarer seg delvis med sitt tykke, harde skall og delvis ved å skille ut giftig blod om de blir alvorlig truet. Dette danner påfallende, røde dråper og har gitt billene det engelske navnet "bloody-nose beetles". Artene lever på bakken i tørre, varme områder, for eksempel maquis. Billene er hovedsklaig nattaktive.
Utbredelse Slekten er utbredt i Nord-Afrika, Sør- og Sentral.Europa, Midtøsten og Asia. På grunn av billenes begrensede mobilitet har det utviklet seg svært mange lokale arter i denne slekten Gómez-Zurita, J. (2008) Species and speciation in Timarcha. I: P. Jolivet, J. Santiago-Blay og M. Schmitt (red.) Research on Chrysomelidae. Brill Academic Publishers, Leiden, Nederland.. Dessuten finnes det noen få arter på vestkysten av Nord-Amerika.
Systematisk inndeling thumb|300px| Timarcha goettingensis Det er sannsynlig at en del av de navngitte formene bare er fargevarianter .
orden biller (Coleoptera) underorden Polyphaga overfamilie Chrysomeloidea Latreille, 1802 (=Phytophaga) familien bladbiller (Chrysomelidae Latreille, 1802) underfamilien Bladbiller, Chrysomelinae Latreille, 1802 stammen Timarchini slekten Timarcha Latreille, 1829 Underslekten Americanotimarcha Jolivet, 1948 - noen ganger regnet som en egen slekt, to arter i vestlige Nord-Amerika Timarcha cerdo Stål, 1863 Timarcha cerdo cerdo Stål, 1863 Timarcha cerdo leechi Jolivet, 1948 Timarcha intricata Haldeman, 1853 Timarcha intricata intricata Haldeman, 1853 Timarcha intricata vandykei Jolivet, 1948 Timarcha intricata viridis Jolivet, 1948 Timarcha intricata yvettae Jolivet, 1948 Underslekten Metallotimarcha Motschulsky, 1860 Timarcha corinthia Fairmaire, 1873 Timarcha corinthia albanica Apfelbeck, 1912 Timarcha corinthia corinthia Fairmaire, 1873 Timarcha gibba (Hagenbach, 1825) Timarcha hummelii Faldermann, 1837 Timarcha hummelii humellii Faldermann, 1837 Timarcha hummelii starcki Bechyné, 1953 Timarcha metallica Laicharting, 1781 Underslekten Timarcha (i snever forstand) Timarcha apricaria Waltl, 1835 Timarcha apuana Daccordi & Ruffo, 1990 Timarcha aurichalcea Bechyné, 1948 Timarcha balearica Gory, 1829 Timarcha calceata Perez, 1865 Timarcha chalcosoma Fairmaire, 1868 Timarcha coarcticollis Fairmaire, 1873 Timarcha coarcticollis coarcticollis Fairmaire, 1873 Timarcha coarcticollis paulinoi Kraatz, 1879 Timarcha erosa Fairmaire, 1873 Timarcha erosa erosa Fairmaire, 1873 Timarcha erosa vermiculata Fairmaire, 1880 Timarcha espanoli Bechyné, 1948 Timarcha fallax Perez, 1865 Timarcha fallax fallax Perez, 1865 Timarcha fallax piochardi Fairmaire, 1873 Timarcha fallax sagrensis Kuntzen, 1911 Timarcha fallax tortosensis Bechyné, 1948 Timarcha granadensis Bechyné, 1948 Timarcha granadensis dislocata Bechyné, 1948 Timarcha granadensis granadensis Bechyné, 1948 Timarcha gravis Rosenhauer, 1856 Timarcha guipuzcoana Bechyné Timarcha heydeni Weise, 1882 Timarcha hispanica Herrich-Schaeffer, 1838 Timarcha hispanica hispanica Herrich-Schaeffer, 1838 Timarcha hispanica laevisterna Fairmaire, 1880 Timarcha hispanica rugipennis Perez, 1865 Timarcha hispanica sobrina Fairmaire, 1884 Timarcha hispanica transversicollis Fairmaire, 1880 Timarcha insparsa Rosenhauer, 1856 Timarcha intermedia Herrich-Schaeffer, 1838 Timarcha kiesenwetteri Kraatz, 1879 Timarcha marginicollis Rosenhauer, 1856 Timarcha melica Bechyné, 1947 Timarcha nicaeensis Villa, 1853 Timarcha nicaeensis italica Herrich-Schäffer, 1838 Timarcha nicaeensis nicaeensis Villa, 1853 Timarcha nicaeensis sontiaca Müller, 1948 Timarcha parvicollis Rosenhauer, 1856 Timarcha parvicollis elocata Bechyné, 1953 Timarcha parvicollis nitendula Bechyné, 1953 Timarcha parvicollis parvicollis Rosenhauer, 1856 Timarcha pimelioides Herrich-Schaeffer, 1838 Timarcha rugulosa Herrich-Schaeffer, 1838 Timarcha rugulosa globata Fairmaire, 1873 Timarcha rugulosa lomnickii Miller, 1867 Timarcha rugulosa rugulosa Herrich-Schaeffer, 1838 Timarcha rugulosa sinaiana Bechyné, 1947 Timarcha rugulosa stichai Bechyné, 1947 Timarcha seidlitzi Kraatz, 1879 Timarcha strophium Weise, 1888 Timarcha tenebricosa (Fabricius, 1775) Timarcha tenebricosa anglica Bechyné, 1945 Timarcha tenebricosa angusticollis Fairmaire, 1873 Timarcha tenebricosa bulgarica Timarcha tenebricosa heyrowskyi Bechyné, 1945 Timarcha tenebricosa moravica Bechyné, 1945 Timarcha tenebricosa motschulskyi Bechyné, 1945 Timarcha tenebricosa normandiana Bechyné, 1945 Timarcha tenebricosa pauperata Bechyné, 1945 Timarcha tenebricosa submontana Bechyné, 1945 Timarcha tenebricosa tenebricosa (Fabricius, 1775) Timarcha tenebricosa transgrediens Bechyné, 1948 Timarcha tenuicornis Fairmaire, 1880 Timarcha validicornis Fairmaire, 1873 Timarcha validicornis camoensii Fairmaire, 1873 Timarcha validicornis validicornis Fairmaire, 1873 Underslekten Timarchostoma Motschulsky, 1860 Timarcha affinis Laboissiere, 1939 Timarcha aragonica Balbi, 1892 Timarcha aragonica aragonica Balbi, 1892 Timarcha aragonica spectacula Bechyné, 1962 Timarcha asturiensis Kraatz, 1879 Timarcha asturiensis asturiensis Kraatz, 1879 Timarcha asturiensis convexifrons Fairmaire, 1880 Timarcha catalaunensis Fairmaire, 1873 Timarcha catalaunensis belchitensis Bechyné, 1948 Timarcha catalaunensis catalaunensis Fairmaire, 1873 Timarcha chloropus (Germar, 1824) Timarcha chloropus chloropus (Germar, 1824) Timarcha chloropus semilaevis Fairmaire, 1873 Timarcha cornuta Bechyné, 1944 Timarcha cyanescens Fairmaire, 1861 Timarcha cyanescens aequata Bechyné, 1953 Timarcha cyanescens cyanescens Fairmaire, 1861 Timarcha cyanescens leseleuci Marseul, 1887 Timarcha cyanescens vizcayensis Bechyné, 1953 Timarcha daillei Laboissiere, 1939 Timarcha daillei cylindricollis Bechyné, 1948 Timarcha daillei daillei Laboissiere, 1939 Timarcha daillei franzi Bechyné, 1962 Timarcha daillei pseudoperezi Bechyné, 1953 Timarcha daillei pygmaeola Bechyné, 1953 Timarcha daillei rhilensis Weise, 1891 Timarcha durmitoriensis Apfelbeck, 1912 Timarcha elliptica Fairmaire, 1873 Timarcha fracassii Meier, 1900 Timarcha geniculata (Germar, 1824) Timarcha globipennis Fairmaire, 1873 Timarcha goettingensis (Linnaeus, 1758) Timarcha goettingensis aerea Herrich-Schäffer, 1838 Timarcha goettingensis andrzejowskii Krynicki, 1832 Timarcha goettingensis arvernensis Laboissiere, 1939 Timarcha goettingensis atramentaria Bechyné, 1948 Timarcha goettingensis carpathica Bechyné, 1946 Timarcha goettingensis gallica Fairmaire, 1873 Timarcha goettingensis goettingensis (Linnaeus, 1758) Timarcha goettingensis mangaliana Bechyné, 1946 Timarcha goettingensis normanna Reiche, 1872 Timarcha goettingensis obenbergeri Bechyné, 1947 Timarcha goettingensis semirufa Pic, 1931 Timarcha goettingensis splendiflora Bechyné, 1946 Timarcha gougeleti Fairmaire, 1859 Timarcha interstitialis Fairmaire, 1861 Timarcha interstitialis bruleriei Bellier, 1870 Timarcha interstitialis cebennica Jeanne, 1965 Timarcha interstitialis interstitialis Fairmaire, 1861 Timarcha interstitialis sinuatocollis Fairmaire, 1861 Timarcha janthinipes Fairmaire, 1880 Timarcha lusitanica (Fabricius, 1781) Timarcha maritima Perris, 1850 Timarcha melitensis Weise, 1882 Timarcha monserratensis Bechyné, 1962 Timarcha montana Fairmaire, 1873 Timarcha monticola Dufour, 1843 Timarcha monticola altimontana Bechyné, 1948 Timarcha monticola monticola Dufour, 1843 Timarcha oblongula Fairmaire, 1880 Timarcha obsoleta Laboissiere, 1937 Timarcha olivieri Fairmaire, 1868 Timarcha olivieri dubitabilis Fairmaire, 1873 Timarcha olivieri olivieri Fairmaire, 1868 Timarcha olivieri parnassia Fairmaire, 1868 Timarcha olivieri paulmeyeri Stiller, 1926 Timarcha perezi Fairmaire, 1884 Timarcha perezi perezi Fairmaire, 1884 Timarcha perezi praecox Bechyné, 1953 Timarcha perezi vivesi Bechyné, 1962 Timarcha pontavicei Marseul, 1883 Timarcha pratensis Duftschmid, 1825 Timarcha recticollis Fairmaire, 1891 Timarcha sardea Villa, 1835 Timarcha sicelides Reiche, 1860 Timarcha sphaeroptera Fairmaire, 1873 Timarcha stepaneki Bechyné, 1946 Timarcha strangulata Fairmaire, 1861 Timarcha strangulata aubryi Jeanne, 1965 Timarcha strangulata breiti Bechyné, 1953 Timarcha strangulata decens Bechyné, 1953 Timarcha strangulata epipleuralis Bechyné, 1953 Timarcha strangulata pseudostrangulata Bechyné, 1953 Timarcha strangulata sculptipennisBechyné, 1948 Timarcha strangulata strangulata Fairmaire, 1861 Timarcha temperei Jeanne, 1965 Timarcha trapezicollis Fairmaire, 1873 Timarcha achardi Bechyné, 1945 Timarcha aguilari Bechyné, 1946 Timarcha amethystipes Chevrolat, 1873 Timarcha angusta Bechyné, 1944 Timarcha angusta algirica Bechyné Timarcha angusta angusta Bechyné, 1944 Timarcha apicicornis Bechyné, 1948 Timarcha araneiformis Bechyné, 1947 Timarcha atlantica Bechyné, 1944 Timarcha brachydera Fairmaire, 1873 Timarcha brevipennis Pic, 1919 Timarcha corallipes Fairmaire, 1873 Timarcha corpulenta Bechyné, 1944 Timarcha crassaticollis Fairmaire, 1873 Timarcha cyrenaica Peyerimhoff, 1925 Timarcha djelfaica Bechyné, 1947 Timarcha endora Buquet, 1840 Timarcha endora demoflysi Normand, 1950 Timarcha endora endora Buquet, 1840 Timarcha fossulata Bechyné, 1948 Timarcha freyi Bechyné, 1953 Timarcha generosa Erichson, 1841 Timarcha generosa generosa Erichson, 1841 Timarcha generosa mesatlantica Kocher Timarcha generosa rungsi Kocher, 1959 Timarcha generosa subscabra Kocher, 1959 Timarcha globulata Fairmaire, 1874 Timarcha gnaptoroides Bechyné, 1944 Timarcha henonii Fairmaire, 1873 Timarcha iblanensis Antoine, 1939 Timarcha immarginata Timarcha insignis Guerin, 1859 Timarcha insignis inornata Bechyné Timarcha insignis insignis Guerin, 1859 Timarcha khalouensis Jolivet, 1966 Timarcha laevigata (Linnaeus, 1767) Timarcha laevigata inaequalis Pic, 1924 Timarcha laevigata laevigata (Linnaeus, 1767) Timarcha laevigata robustior Bechyné, 1944 Timarcha latipes (Linnaeus, 1767) Timarcha latipes djerbensis Pic Timarcha latipes latipes (Linnaeus, 1767) Timarcha mairei Peyerimhoff, 1923 Timarcha mairei humberti Peyerimhoff, 1925 Timarcha mairei lecerfi Kocher, 1951 Timarcha mairei mairei Peyerimhoff, 1923 Timarcha mairei peyerimhoffi Kocher, 1951 Timarcha mairei tichuktensis Kocher, 1957 Timarcha marani Bechyné, 1948 Timarcha maroccana Weise, 1882 Timarcha melas Bechyné, 1944 Timarcha nitidipes Bechyné, 1944 Timarcha opacicollis Bechyné, 1944 Timarcha peresa Peyerimhoff, 1908 Timarcha pfefferi Bechyné, 1945 Timarcha prujai Kocher, 1963 Timarcha punctella Marseul, 1870 Timarcha punctella antiatlantica Jolivet, 1968 Timarcha punctella punctella Marseul, 1870 Timarcha punctella sarhroensis Jolivet, 1968 Timarcha punctella schrammi Kocher, 1956 Timarcha punctella teluetica Escalera, 1914 Timarcha punica Lucas, 1849 Timarcha reticulata Timarcha riffensis Fairmaire, 1887 Timarcha rugosa (Linnaeus, 1767) Timarcha rugosa aterrima Bechyné, 1944 Timarcha rugosa rugata Kocher, 1951 Timarcha rugosa rugosa (Linnaeus, 1767) Timarcha rugosa kourili Bechyné, 1944 Timarcha rugosa minutissima Bechyné Timarcha rugosoidea Jolivet, 1944 Timarcha scabra (Olivier, 1807) Timarcha scabripennis Fairmaire, 1868 Timarcha scabripennis bechynei Kocher, 1959 Timarcha scabripennis ifranensis Jolivet, 1968 Timarcha scabripennis infoveolata Kocher, 1951 Timarcha scabripennis scabripennis Fairmaire, 1868 Timarcha scabripennis vazquezi Jolivet, 1968 Timarcha scutellaris Timarcha sphaeromorpha Bechyné