Identification keys available for Order Pleuronectiformes
| Key | Title |
| 37 | Key to families of New Zealand bony fishes, section A, flatfishes. |
| 70 | Key to the flatfishes (Pleuronectiformes) of Europe. |
| 383 | Key to the species of largescale flounders (Citharidae) occuring in the Western Central Pacific. |
| 384 | Key to the genera of lefteye flounders (Bothidae) occuring in the Western Central Pacific. |
| 385 | Key to the species of Arnoglossus occuring in the Western Central Pacific. |
| 386 | Key to the species of Asterorhombus occuring in the Western Central Pacific. |
| 387 | Key to the species of Bothus occuring in the Western Central Pacific. |
| 388 | Key to the species of Crossorhombus occuring in the Western Central Pacific. |
| 389 | Key to the species of Engyprosopon occuring in the Western Central Pacific. |
| 390 | Key to the species of Grammatobothus occuring in the Western Central Pacific. |
| 391 | Key to the species of Laeops occuring in the Western Central Pacific. |
| 392 | Key to the species of Parabothus occuring in the Western Central Pacific. |
| 393 | Key to the species of Psettina occuring in the Western Central Pacific. |
| 394 | Key to the species of Tosarhombus occuring in the Western Central Pacific. |
| 395 | Key to the species of sand flounders (Paralichthyidae) occuring in the Western Central Pacific. |
| 396 | Key to the genera of righteye flounders (Pleuronectidae) occuring in the Western Central Pacific. |
| 397 | Key to the species of Nematops occuring in the Western Central Pacific. |
| 398 | Key to the species of Poecilopsetta occuring in the Western Central Pacific. |
| 399 | Key to the species of Samaris occuring in the Western Central Pacific. |
| 400 | Key to the species of Samariscus occuring in the Western Central Pacific. |
| 401 | Key to the genera of soles (Soleidae) occuring in the Western Central Pacific. |
| 402 | Key to the species of tonguesoles (Cynoglossidae) occuring in the Western Central Pacific. |
| 566 | Key to species of Bathysolea. |
| 705 | Key to suborders of Chinese flatfishes. |
| 706 | Key to families of Chinese flatfishes (suborder Pleuronectoidei). |
| 707 | Key to genera of large-toothed flounders (Paralichthyidae) from China. |
| 708 | Key to species of Pseudorhombus from China. |
| 709 | Key to genera of lefteye flounders (Bothidae) from China. |
| 710 | Key to species of Arnoglossus from China. |
| 711 | Key to species of Psettina from China. |
| 712 | Key to species of Parabothus from China. |
| 713 | Key to species of Crossorhombus from China. |
| 714 | Key to species of Engyprosopon from China. |
| 715 | Key to species of Bothus from China. |
| 716 | Key to genera of righteye flounders (Pleuronectidae) occuring in China. |
| 717 | Key to species of Verasper from China. |
| 718 | Key to species of Pseudopleuronectes from China. |
| 719 | Key to species of Poecilopsetta from China. |
| 720 | Key to genera of family Samaridae occuring in China. |
| 721 | Key to species of Samariscus from China. |
| 722 | Key to species of Plagiopsetta from China. |
| 723 | Key to genera of soles (Soleidae) occuring in China. |
| 724 | Key to the species of Aseraggodes from China. |
| 725 | Key to the species of Heteromycteris from China. |
| 726 | Key to the species of Brachirus from China. |
| 727 | Key to the species of Zebrias from China. |
| 728 | Key to the species of Paraplagusia from China. |
| 729 | Key to the species of Cynoglossus from China. |
| 730 | Key to the species of Symphurus from China. |
| 866 | Key to families, genera and species of order Pleuronectiformes from the South China Sea. |
| 1101 | Key to the species of lefteye flounder (Bothidae) occurring in the Western Central Atlantic. |
| 1102 | Key to the species of sand flounders (Paralichthyidae) occurring in the Western Central Atlantic. |
| 1103 | Key to the species american soles (Achiridae) occurring in the Western Central Atlantic. |
| 1104 | Key to the species of tonguefishes and tongue soles (Cynoglossidae) occurring in the Western Central Atlantic. |
| 1124 | Key to species of Apionichthys. |
| 1298 | Key to the freshwater genera of Soleidae from New Guinea. |
| 1510 | Key to genera of Soleidae of West Africa. |
| 1733 | Key to all species of the genus Cyclopsetta Gill, 1889 (Pleuronectiformes: Cyclopsettidae), 4 spp. in 2004. |
| 1735 | Key to all species of the genus Peltorhamphus Günther, 1862 (Pleuronectiformes: Rhombosoleidae), 4 spp. as of 2022. |
| 1736 | Key to the species of the genus Engyprosopon Günther, 1862 (Pleuronectiformes: Bothidae) of Taiwan, 9 spp. as of 2018. |
| 1738 | Key to the shallow-water species of the genus Symphurus Rafinesque 1810 (Pleuronectiformes: Cynoglossidae) from the Indo-Pacific, 10 spp. as of 2021. |
| 1739 | Key to the species-group Cynoglossus ogilbyi Norman, 1926 (Pleuronectiformes: Cynoglossidae), 6 spp. as of 2021. |
| 1740 | Key to the species of the genus Paralichthys Girard, 1858 (Pleuronectiformes: Paralichthyidae) of the Atlantic Ocean, 11 spp. as of 2018. |
| 1741 | Key to the species of the genus Paralichthys Girard, 1858 (Pleuronectiformes: Paralichthyidae) of the Pacific Ocean, 8 spp. as of 2018. |
| 1742 | Key to all species of the genus Asterorhombus Tanaka 1915 (Pleuronectiformes: Bothidae), 3 spp. as of 2005. |
| 1743 | Key to the species of the genus Laeops Günther, 1880 (Pleuronectiformes: Bothidae) of Indo-Pacific, 9 spp. as of 2020. |
| 1744 | Key to all species of the species-group Cynoglossus carpenteri Alcock 1889 (Pleuronectiformes: Cynoglossidae), 6 spp. as of 2019. |