• Pentacta Goldfuss, 1820
• Pentacta arae Boone, 1938 accepted as Pseudocolochirus violaceus (Théel, 1886)
• Pentacta australis (Ludwig, 1875) accepted as Plesiocolochirus australis (Ludwig, 1875)
• Pentacta calcigera Stimpson, 1851 accepted as Pentamera calcigera (Stimpson, 1851)
• Pentacta coerulea (Semper, 1868) accepted as Colochirus quadrangularis Troschel, 1846
• Pentacta coerulea var. rubra Clark, 1938 accepted as Colochirus quadrangularis Troschel, 1846
• Pentacta colloradiatus (Haacke, 1880) accepted as Colochirus colloradiatus Haacke, 1880
• Pentacta crassa (Ekman, 1918) accepted as Colochirus crassus Ekman, 1918
• Pentacta cucumis (Semper, 1867) accepted as Cercodemas anceps Selenka, 1867
• Pentacta dispar (Lampert, 1889) accepted as Pseudocolochirus dispar (Lampert, 1889) accepted as Plesiocolochirus dispar (Lampert, 1889)
• Pentacta doliolum (Pallas, 1766)
• Pentacta frondosa (Gunnerus, 1767) accepted as Cucumaria frondosa (Gunnerus, 1767)
• Pentacta gravieri (Vaney) accepted as Plesiocolochirus dispar (Lampert, 1889)
• Pentacta guinensis (Heding, 1943)
• Pentacta hedingi Panning, 1940
• Pentacta inornatus (von Marenzeller, 1882) accepted as Plesiocolochirus inornatus (von Marenzeller, 1882)
• Pentacta jagorii (Semper, 1867) accepted as Colochirus quadrangularis Troschel, 1846
• Pentacta kowalevskii Jarzynsky in Théel, 1886 (unaccepted > nomen nudum)
• Pentacta löppenthini Heding, 1940 accepted as Plesiocolochirus armatus (von Marenzeller, 1882)
• Pentacta minuta (Ludwig, 1875) accepted as Colochirus minutus Ludwig, 1875 accepted as Plesiocolochirus australis (Ludwig, 1875)
• Pentacta nipponensis Clark, 1938
• Pentacta panamensis Verrill, 1867
• Pentacta peterseni Ancona Lopez, 1965
• Pentacta piperata Stimpson, 1864 accepted as Cucumaria piperata (Stimpson, 1864)
• Pentacta planciana Delle Chiaje, 1841 accepted as Cucumaria planciana (Delle Chiaje, 1841)
• Pentacta populifer Stimpson, 1864 accepted as Pentamera populifera (Stimpson, 1864)
• Pentacta propinqua (Haacke, 1880) accepted as Colochirus propinquus Haacke, 1880
• Pentacta pusilla (Helfer, 1912) accepted as Colochirus pusillus Helfer, 1912
• Pentacta pygmaea (Théel, 1886) accepted as Aslia pygmaea (Théel, 1886)
• Pentacta quadrangularis (Troschel, 1846) accepted as Colochirus quadrangularis Troschel, 1846
• Pentacta robustus (Östergren, 1898) accepted as Colochirus robustus Östergren, 1898
• Pentacta squamosa Cherbonnier, 1970 accepted as Ocnus capensis (Théel, 1886)
• Pentacta tessellara Cherbonnier, 1970 accepted as Plesiocolochirus tessellarus (Cherbonnier, 1970)
• Pentacta trimorpha Clark, 1921 accepted as Plesiocolochirus dispar (Lampert, 1889)
• Pentacta tristis (Ludwig, 1875) accepted as Colochirus quadrangularis Troschel, 1846
• Pentacta verrucula Cherbonnier, 1988