De steilkopjes (Cryptocephalus) vormen een geslacht van kevers uit de familie van de bladkevers (Chrysomelidae).Chrysomelidae in Synopsis of the described Coleoptera of the World, 13 december 2008. Gearchiveerd op 27 september 2013. De wetenschappelijke naam van het geslacht werd in 1762 gepubliceerd door Etienne Louis Geoffroy.
Soorten Cryptocephalus acutesternalis Medvedev, 1978 Cryptocephalus ajeschae Schoeller, 2006 Cryptocephalus albolineatus Suffrian, 1847 Cryptocephalus alborzensis Rapilly, 1980 Cryptocephalus alesi Medvedev & Bezdek, 2001 Cryptocephalus alnicola Costa, 1885 Cryptocephalus alpigradus Lopatin, 1982 Cryptocephalus andrewsi Riley & Gilbert, 1999 Cryptocephalus androgyne Marseul, 1875 Cryptocephalus anticus Suffrian, 1848 Cryptocephalus apicalis Gebler, 1830 Cryptocephalus aquitanus Sassi, 2001 Cryptocephalus asturiensis Heyden, 1870 Cryptocephalus atrifrons Abeille, 1901 Cryptocephalus atriplicis Lopatin, 1967 Cryptocephalus aureolus Suffrian, 1847 Cryptocephalus australobispinus Riley & Gilbert, 1999 Cryptocephalus ayvazi Gok & Sassi, 2002 Cryptocephalus baeticus Suffrian, 1847 Cryptocephalus bahadur Lopatin, 1984 Cryptocephalus bahilloi Lopez-Colon, 2003 Cryptocephalus bameuli Duhaldeborde, 1999 Cryptocephalus barii Burlini, 1948 Cryptocephalus baroniurbanii Lopatin, 1982 Cryptocephalus beckeri F. Morawitz, 1860 Cryptocephalus bhutana Medvedev & Sprecher-Uebersax, 1997 Cryptocephalus bicolor Eschscholtz, 1818 Cryptocephalus bifurcatus Kimoto & Gressitt, 1981 Cryptocephalus biguttatus Scopoli, 1763 Cryptocephalus biguttulus Suffrian, 1848 Cryptocephalus biledjekensis Pic, 1909 Cryptocephalus bilineatus Linnaeus, 1767 Cryptocephalus bimaculatus Fabricius, 1781 Cryptocephalus biondii Sassi & Regalin, 1998 Cryptocephalus bipunctatus Linnaeus, 1758 Cryptocephalus blanduloides Normand, 1947 Cryptocephalus bohemius Drapiez, 1819 Cryptocephalus boreoindicus Lopatin, 1995 Cryptocephalus borowieci Warchalowski, 1999 Cryptocephalus brancuccii Lopatin, 1984 Cryptocephalus buettikeri Lopatin, 1979 Cryptocephalus cantabricus Franz, 1958 Cryptocephalus carinthiacus Suffrian, 1884 Cryptocephalus carpathicus Frivaldszky, 1883 Cryptocephalus castilianus Weise, 1894 Cryptocephalus celtibericus Suffrian, 1848 Cryptocephalus chrysopus Gmelin, 1790 Cryptocephalus cicatricosus Lucas, 1845 Cryptocephalus cognatus Costa, 1888 Cryptocephalus connexus G. A. Olivier, 1807 Cryptocephalus conterraneus Lopatin, 2003 Cryptocephalus convergens Sassi, 2001 Cryptocephalus cordiger Linnaeus, 1758 Cryptocephalus coronatus Suffrian, 1847 Cryptocephalus coryli Linnaeus, 1758 Cryptocephalus corynetes Warchalowski, 1999 Cryptocephalus corynthius Pic, 1914 Cryptocephalus crassus G. A. Olivier, 1791 Cryptocephalus cremeus Tan, 1988 Cryptocephalus crenatus Wollaston, 1854 Cryptocephalus creticus Suffrian, 1847 Cryptocephalus cristula Dufour, 1843 Cryptocephalus cruciger Hellen, 1922 Cryptocephalus curvilinea G. A. Olivier, 1808 Cryptocephalus cyanipes Suffrian, 1847 Cryptocephalus cynarae Suffrian, 1847 Cryptocephalus czwalinae Weise, 1882 Cryptocephalus daccordii Biondi, 1995 Cryptocephalus danieli Clavareau, 1913 Cryptocephalus decemmaculatus Linnaeus, 1758 Cryptocephalus dentisternus Medvedev & Samoderzhenkov, 1987 Cryptocephalus dinae Lopatin & Chikatunov, 1999 Cryptocephalus distinguendus Schneider, 1792 Cryptocephalus dogueti Bourdonne, 1994 Cryptocephalus downiei Riley & Gilbert, 1999 Cryptocephalus duplicatus Suffrian, 1845 Cryptocephalus eberti Kimoto, 2004 Cryptocephalus egenus Tang, 1992 Cryptocephalus ejimai Takizawa, 1990 Cryptocephalus elegantulus Gravenhorst, 1807 Cryptocephalus elkhalidii Lopatin, 1983 Cryptocephalus elongatus Germar, 1824 Cryptocephalus equiseti Costa, 1888 Cryptocephalus erberi Lopatin, 1991 Cryptocephalus ergenensis F. Morawitz, 1863 Cryptocephalus eridani Sassi, 2001 Cryptocephalus eroshkinae Medvedev & Samoderzhenkov, 1987 Cryptocephalus espanoli Burlini, 1965 Cryptocephalus etruscus Sassi, 1995 Cryptocephalus evae Lopatin, 2002 Cryptocephalus excisus Seidlitz, 1872 Cryptocephalus exiguus Schneider, 1792 Cryptocephalus falzonii Burlini, 1956 Cryptocephalus fasciatointerruptus Berti & Rapilly, 1979 Cryptocephalus flavicaudis Tang, 1992 Cryptocephalus flavicollis Fabricius, 1781 Cryptocephalus flavipes Fabricius, 1781 Cryptocephalus flexuosus Krynicki, 1834 Cryptocephalus floralis Krynicki, 1834 Cryptocephalus floribundus Suffrian, 1866 Cryptocephalus foveatus Medvedev, 2003 Cryptocephalus freidbergi Lopatin & Chikatunov, 1997 Cryptocephalus frenatus Laicharting, 1781 Cryptocephalus frontalis Marsham, 1802 Cryptocephalus fulvus Goeze, 1777 Cryptocephalus furvicornis Tang, 1992 Cryptocephalus gabbari Schoeller, 2005 Cryptocephalus gamma Herrich-Schaeffer, 1829 Cryptocephalus gangaridus Lopatin, 1979 Cryptocephalus gialaiensis Medvedev & Samoderzhenkov, 1987 Cryptocephalus globicollis Suffrian, 1847 Cryptocephalus gorbunovi Medvedev, 1999 Cryptocephalus gridellii Burlini, 1950 Cryptocephalus grohmanni Suffrian, 1848 Cryptocephalus hakonensis Takizawa, 1982 Cryptocephalus hanungus Medvedev & Samoderzhenkov, 1987 Cryptocephalus hartmanni Medvedev, 2003 Cryptocephalus haucki Medvedev & Bezdek, 2001 Cryptocephalus heinigi Warchalowski, 1999 Cryptocephalus helobius Tang, 1992 Cryptocephalus hirticollis Suffrian, 1847 Cryptocephalus hohuanshanus Kimoto, 1996 Cryptocephalus hopei Medvedev & Sprecher-Uebersax, 1997 Cryptocephalus hypochaeridis Linnaeus, 1758 Cryptocephalus ilicis G. A. Olivier, 1808 Cryptocephalus imperialis Laicharting, 1781 Cryptocephalus impressipygus Ogloblin, 1956 Cryptocephalus incisus Tang, 1992 Cryptocephalus infirmior Kraatz, 1876 Cryptocephalus informis Suffrian, 1847 Cryptocephalus ingamma Pic, 1908 Cryptocephalus janthinus Germar, 1824 Cryptocephalus jocularius Normand, 1947 Cryptocephalus kabaki Lopatin, 2002 Cryptocephalus kabakovi Medvedev, 1978 Cryptocephalus katranus Lopatin & Chikatunov, 1997 Cryptocephalus kermanicus Lopatin, 1979 Cryptocephalus khajami Lopatin, 1980 Cryptocephalus kharazii Berti & Rapilly, 1979 Cryptocephalus klarae Lopatin, 1990 Cryptocephalus kopetzi Medvedev, 2003 Cryptocephalus korotyaevi Medvedev, 1980 Cryptocephalus krutovskyi Jacobson, 1900 Cryptocephalus kuznetzovi Medvedev, 1992 Cryptocephalus labiatus Linnaeus, 1761 Cryptocephalus lactineus Tang, 1992 Cryptocephalus laetus Fabricius, 1792 Cryptocephalus laevicollis Gebler, 1830 Cryptocephalus lanpingensis Tang, 1992 Cryptocephalus laoticus Medvedev, 2004 Cryptocephalus lateralis Suffrian, 1863 Cryptocephalus lederi Weise, 1889 Cryptocephalus lentiginosus Tang, 1992 Cryptocephalus leonhardi Breit, 1918 Cryptocephalus limarius Lopatin, 1984 Cryptocephalus limbifer Seidlitz, 1867 Cryptocephalus lineellus Suffrian, 1849 Cryptocephalus linnavuorii Lopatin, 1986 Cryptocephalus lividimanus Suffrian, 1851 Cryptocephalus loebli Sassi, 1997 Cryptocephalus lopatianus Medvedev & Sprecher-Uebersax, 1997 Cryptocephalus lopatini Iablokoff-Khnzorian, 1983 Cryptocephalus lopatini Medvedev, 1978 Cryptocephalus loreyi Solier, 1837 Cryptocephalus lostiai Burlini, 1951 Cryptocephalus lucidus Rapilly, 1980 Cryptocephalus ludingensis Tang, 1992 Cryptocephalus luridicollis Suffrian, 1868 Cryptocephalus lusitanicus Suffrian, 1847 Cryptocephalus macellus Suffrian, 1860 Cryptocephalus macilentus Lopatin, 2001 Cryptocephalus magnus Kimoto & Gressitt, 1981 Cryptocephalus majoricensis de la Fuente, 1918 Cryptocephalus margaritae Lopatin, 1997 Cryptocephalus marginatus Fabricius, 1781 Cryptocephalus marginellus G. A. Olivier, 1791 Cryptocephalus mariae Rey, 1851 Cryptocephalus mayeti Marseul, 1878 Cryptocephalus maytreiae Lopatin, 1979 Cryptocephalus meridiobrunneus Schoeller, 2002 Cryptocephalus micheli Medvedev & Sprecher-Uebersax, 1997 Cryptocephalus modestus Suffrian, 1848 Cryptocephalus moniliformis Lopatin, 1980 Cryptocephalus moraei Linnaeus, 1758 Cryptocephalus moroderi Pic, 1914 Cryptocephalus mroczkowskii Warchalowski, 1997 Cryptocephalus muellerianus Burlini, 1955 Cryptocephalus mystacatus Suffrian, 1848 Cryptocephalus nanus Tang, 1992 Cryptocephalus natalliae Lopatin, 1997 Cryptocephalus nigellus Lopatin & Chikatunov, 1999 Cryptocephalus nigrobasalis Kimoto & Gressitt, 1981 Cryptocephalus nigroflavus Lopatin, 2004 Cryptocephalus nitidicollis Wollaston, 1864 Cryptocephalus nitidulus Fabricius, 1787 Cryptocephalus nitidus Linnaeus, 1758 Cryptocephalus nubigena Franz, 1982 Cryptocephalus numidicus Bourdonne, 1994 Cryptocephalus obliteratifer Pic, 1900 Cryptocephalus ocellatus Drapiez, 1819 Cryptocephalus ochroleucus Fairmaire, 1859 Cryptocephalus octoguttatus Linnaeus, 1767 Cryptocephalus octomaculatus Rossi, 1790 Cryptocephalus octopunctatus Scopoli, 1763 Cryptocephalus ohnoi Kimoto, 1983 Cryptocephalus omanicus Medvedev, 1996 Cryptocephalus orotschena Jacobson, 1926 Cryptocephalus ozbeki Aslan & Warchalowski, 1998 Cryptocephalus pachlatkoi Medvedev & Sprecher-Uebersax, 1997 Cryptocephalus paganensis Pic, 1914 Cryptocephalus pallifrons Gyllenhaal, 1813 Cryptocephalus palmensis Franz, 1982 Cryptocephalus paphlagonius Sassi & Kismali, 2000 Cryptocephalus parvulus O.F. Müller, 1776 Cryptocephalus paulomaculatus Kimoto & Gressitt, 1981 Cryptocephalus pedatus Tang, 1992 Cryptocephalus penguensis Lopatin, 1991 Cryptocephalus pexicollis Suffrian, 1847 Cryptocephalus pini Linnaeus, 1758 Cryptocephalus planifrons Weise, 1882 Cryptocephalus plantaris Suffrian, 1868 Cryptocephalus podager Seidlitz, 1867 Cryptocephalus pokharensis Medvedev & Sprecher-Uebersax, 1999 Cryptocephalus politus Suffrian, 1853 Cryptocephalus pominorum Burlini, 1956 Cryptocephalus populi Suffrian, 1848 Cryptocephalus potanini Lopatin, 2001 Cryptocephalus prasolovi Lopatin, 1992 Cryptocephalus praticola Weise, 1889 Cryptocephalus primarius Harold, 1872 Cryptocephalus prusias Suffrian, 1853 Cryptocephalus przewalskii Lopatin, 1997 Cryptocephalus pseudoexsulans Lopatin, 1982 Cryptocephalus pseudolusitanicus Arnold, 1938 Cryptocephalus pubescens Medvedev, 1996 Cryptocephalus pulchellus Suffrian, 1848 Cryptocephalus puncticollis Wollaston, 1864 Cryptocephalus punctiger Paykull, 1799 Cryptocephalus pushtunicus Lopatin, 1981 Cryptocephalus pusillus Fabricius, 1777 Cryptocephalus pygmaeus Fabricius, 1792 Cryptocephalus quadriguttatus Richter, 1820 Cryptocephalus quadripunctatus G. A. Olivier, 1808 Cryptocephalus quadripustulatus Gyllenhaal, 1813 Cryptocephalus quatuordecimmaculatus Schneider, 1792 Cryptocephalus querceti Suffrian, 1848 Cryptocephalus quinquepunctatus Scopoli, 1763 Cryptocephalus ragusanus Roubal, 1912 Cryptocephalus ramburii Suffrian, 1847 Cryptocephalus rastegari Rapilly, 1980 Cryptocephalus reitteri Weise, 1882 Cryptocephalus renatae Sassi, 2001 Cryptocephalus rufipes Goeze, 1777 Cryptocephalus rufofasciatus Solsky, 1882 Cryptocephalus rugicollis G. A. Olivier, 1791 Cryptocephalus sagamensis Tomov, 1982 Cryptocephalus sagittifer Lopatin, 1997 Cryptocephalus sagittimaculatus Tang, 1992 Cryptocephalus saliceti Zebe, 1855 Cryptocephalus samniticus Leonardi & Sassi, 2001 Cryptocephalus samuelsoni Lopatin, 1997 Cryptocephalus sarbazicus Lopatin, 1980 Cryptocephalus sareptanus F. Morawitz, 1863 Cryptocephalus saryarkensis Medvedev & Kulenova, 1980 Cryptocephalus sassii Lopatin, 1999 Cryptocephalus saucius Truqui, 1852 Cryptocephalus saudiensis Lopatin, 1983 Cryptocephalus scapularis Suffrian, 1848 Cryptocephalus scarificollis Lopatin, 1984 Cryptocephalus schaefferi Schrank, 1789 Cryptocephalus schoelleri Medvedev & Bezdek, 2001 Cryptocephalus scutemaculatus (Tang, 1992) Cryptocephalus seductus Lopatin, 1995 Cryptocephalus semivittatus Medvedev & Samoderzhenkov, 1987 Cryptocephalus senguptai Lopatin, 1997