• Trichia De Haan, 1839 [Family: Xanthidae, Class: Malacostraca]
• Trichia Haller, 1768 [Family: Trichiaceae, Class: Myxomycetes]
• Trichia Hartmann, 1840 [Family: Hygromiidae, Class: Gastropoda]
• Trichia Hoffmann, 1790 (uncertain) [Family: , Class: Protozoa (awaiting allocation)]
• Trichia Hong, 1981 † accepted as Iyaiyai Evenhuis, 1994 † [Family: Chaoboridae, Class: Insecta]
• Trichia Nietner, 1861 (uncertain) [Family: Lepidoptera (awaiting allocation), Class: Insecta]
• Trichia Reuter, 1875 (uncertain) [Family: Miridae, Class: Insecta]
• Trichia abietina Wigand, 1863 accepted as Hemitrichia abietina (Wigand) G. Lister, 1911
• Trichia advenula Massee, 1889 accepted as Trichia contorta (Ditmar) Rostaf., 1875
• Trichia affinis de Bary, 1869
• Trichia album (Bull.) Raeusch., 1797 accepted as Physarum album (Bull.) Chevall., 1826
• Trichia alpina (R.E. Fr.) Meyl., 1921
• Trichia antarctica Aramb. & Spinedi, 1989
• Trichia argillacea (Pers. ex J.F. Gmel.) Poir., 1808 accepted as Cribraria argillacea (Pers.) Pers., 1794
• Trichia arundinariae Rammeloo, 1973 accepted as Metatrichia arundinariae (Rammeloo) T.N. Lakh. & Mukerji, 1977
• Trichia aurantia (Bull.) Raeusch., 1797 accepted as Physarum viride (Bull.) Pers., 1796
• Trichia aurea Schumach., 1803 accepted as Craterium aureum (Schumach.) Rostaf., 1875
• Trichia australis Baker, 1906
• Trichia axifera Bull., 1790 accepted as Stemonitis axifera (Bull.) T. Macbr., 1889
• Trichia ayresii Berk. & Broome, 1850 accepted as Metatrichia vesparium (Batsch) Nann.-Bremek., 1966
• Trichia botrytis (J.F. Gmel.) Pers., 1794
• Trichia brevicapillata Sizova, Titova & Darakov, 1983
• Trichia brunnea J.J. Cox, 1981
• Trichia capsulifera (Bull.) DC., 1805 accepted as Badhamia capsulifera (Bull.) Berk., 1852
• Trichia cinerea Bull., 1790 accepted as Arcyria cinerea (Bull.) Pers., 1801
• Trichia clavata Pers., 1794 accepted as Hemitrichia clavata (Pers.) Rostaf., 1873
• Trichia columbina (Pers.) Poir., 1808 accepted as Lamproderma columbinum (Pers.) Rostaf., 1873
• Trichia conglobata M.L. Farr, 1974
• Trichia contorta (Ditmar) Rostaf., 1875
• Trichia crenulata (Meyl.) Meyl., 1929
• Trichia decipiens (Pers.) T. Macbr., 1899
• Trichia denudata (L.) Vill., 1789 accepted as Arcyria denudata (L.) Wettst., 1886
• Trichia dromiaeformis De Haan, 1839
• Trichia elaterensis (Mulleavy) Ladó, 1997
• Trichia fallax Pers., 1796 accepted as Trichia decipiens (Pers.) T. Macbr., 1899
• Trichia farinacea (Schrad.) Poir., 1808 accepted as Didymium melanospermum (Pers.) T. Macbr., 1899
• Trichia favoginea (Batsch) Pers., 1794
• Trichia fernbankensis Frederick, R. Simons & I.L. Roth, 1984
• Trichia fimicola (Marchal) Ing, 1967
• Trichia flagellifera Berk. & Broome, 1866 accepted as Prototrichia metallica (Berk.) Massee, 1889
• Trichia flavicoma (Lister) Ing, 1967
• Trichia floriformis (Schwein.) G. Lister, 1919 accepted as Metatrichia floriformis (Schwein.) Nann.-Bremek., 1985
• Trichia floripara Rammeloo, 1981 accepted as Metatrichia floripara (Rammeloo) Rammeloo, 1984
• Trichia fragilis (Sowerby) Rostaf., 1876 accepted as Trichia botrytis (J.F. Gmel.) Pers., 1794
• Trichia furfuracea (L.) With., 1801 accepted as Chaenotheca furfuracea (L.) Tibell, 1984
• Trichia globulifera (Bull.) Raeusch., 1797 accepted as Physarum globuliferum (Bull.) Pers., 1801
• Trichia gracilis Hong, 1981 †
• Trichia heteroelaterum H.Z. Li & Yu Li, 1989
• Trichia hispida (Linnaeus, 1758)
• Trichia huizhongii Chao H. Chung & Tzean, 2000
• Trichia inconspicua Rostaf., 1875 accepted as Trichia contorta (Ditmar) Rostaf., 1875
• Trichia intricata (Schrad.) Poir., 1808 accepted as Cribraria intricata Schrad., 1797
• Trichia iowensis T. Macbr., 1892 accepted as Trichia contorta (Ditmar) Rostaf., 1875
• Trichia leucopoda Bull., 1791 accepted as Diachea leucopoda (Bull.) Rostaf., 1875
• Trichia leucopodia Bull., 1791 accepted as Diachea leucopoda (Bull.) Rostaf., 1875
• Trichia lutescens Lister, 1897
• Trichia macbridei M. Peck, 1932
• Trichia macrocarpa (Schrad.) Poir., 1808 accepted as Cribraria macrocarpa Schrad., 1797
• Trichia metallica Berk., 1859 accepted as Prototrichia metallica (Berk.) Massee, 1889
• Trichia meylanii Ing ined.
• Trichia microcarpa (Schrad.) Poir., 1808 accepted as Cribraria microcarpa (Schrad.) Pers., 1801
• Trichia microspora Yu Li & Q. Wang, 1989
• Trichia minuta (Leers) Relhan, 1793 accepted as Craterium minutum (Leers) Fr., 1829
• Trichia mirabilis Nann.-Bremek., 1966
• Trichia munda (Lister) Meyl., 1929
• Trichia neesiana Corda, 1837 accepted as Metatrichia vesparium (Batsch) Nann.-Bremek., 1966
• Trichia nitens Lib., 1834 accepted as Oligonema schweinitzii (Berk.) G.W. Martin, 1947
• Trichia nivea Hoffm., 1790 accepted as Sclerophora pallida (Pers.) Y.J. Yao & Spooner, 1999
• Trichia nutans Bull., 1791 accepted as Arcyria obvelata (Oeder) Onsberg, 1979
• Trichia persimilis P. Karst., 1868
• Trichia ramosa Yu Li & H.Z. Li, 1992 accepted as Trichia huizhongii Chao H. Chung & Tzean, 2000
• Trichia rubiformis Pers., 1794 accepted as Metatrichia vesparium (Batsch) Nann.-Bremek., 1966
• Trichia rufescens (Pers.) Poir., 1808 accepted as Cribraria rufa (Roth) Rostaf., 1875
• Trichia scabra Rostaf., 1875
• Trichia serotina Schrad., 1799 accepted as Trichia botrytis (J.F. Gmel.) Pers., 1794
• Trichia serpula (Scop.) Pers., 1797 accepted as Hemitrichia serpula (Scop.) Rostaf., 1873
• Trichia sordida Johannesen, 1984
• Trichia splendens (Schrad.) Poir., 1808 accepted as Cribraria splendens (Schrad.) Pers., 1801
• Trichia striolata (Pfeiffer, 1828)
• Trichia subretispora T.N. Lakh. & Mukerji, 1980
• Trichia synspora Kowalski & McNichols, 1974
• Trichia tigrina (Schrad.) Poir., 1808 accepted as Lepidoderma tigrinum (Schrad.) Rostaf., 1873
• Trichia typhoides Bull., 1790 accepted as Stemonitopsis typhina (F.H. Wigg.) Nann.-Bremek., 1975
• Trichia utricularis (Bull.) DC., 1805 accepted as Badhamia utricularis (Bull.) Berk., 1852
• Trichia varia (Pers.) Pers., 1794
• Trichia variabilis (Schrad.) Poir., 1808 accepted as Licea variabilis Schrad., 1797
• Trichia verrucosa Berk., 1860
• Trichia viridis (Bull.) Raeusch., 1797 accepted as Physarum viride (Bull.) Pers., 1796
• Trichiaceae Chevallier, 1826
• Trichiales
• Trichiasida Casey, 1912 accepted as Stenomorpha Solier, 1836
• Trichiaspiphenga Duda, 1924 (uncertain)
• Trichiaspis Duda, 1923 (uncertain)