1. Species Trigonium arcticum (Brightwell) Cleve, 1868
2. Species Trigonium inelegans (Greville) A.Mann
3. Species Trigonium abyssorum (Grunow in Van Heurck) Hustedt in Schmidt et al., 1959 accepted as Triceratium abyssorum var. abyssorum Grunow in Van Heurck, 1883 (uncertain > unassessed)
4. Species Trigonium adspersum Mann, 1907 (uncertain > unassessed)
5. Species Trigonium alternans (Bailey) A.Mann, 1907 accepted as Triceratium alternans f. alternans J.W. Bailey, 1851 (uncertain > unassessed)
6. Species Trigonium arcticum Mann, 1907 (uncertain > unassessed)
7. Species Trigonium balaena (Ehrenberg; Ehrenberg) Cleve, 1867 accepted as Zygoceros balaena Ehrenberg, 1853 (uncertain > unassessed)
8. Species Trigonium bicoronatum (Castracane) Mann, 1925 accepted as Stictodiscus bicoronatus var. bicoronatus Castracane, 1886 (uncertain > unassessed)
9. Species Trigonium caelatum (Janisch in Schmidt et al.) Mann, 1925 accepted as Triceratium caelatum Janisch, 1885 (uncertain > unassessed)
10. Species Trigonium capitiferum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
11. Species Trigonium cariosum (Castracane) Hustedt in Schmidt et al., 1959 accepted as Triceratium cariosum Castracane, 1886 (uncertain > unassessed)
12. Species Trigonium cinnamomeum (Greville) Mann, 1907 accepted as Triceratium cinnamomeum var. cinnamomeum Greville, 1863 (uncertain > unassessed)
13. Species Trigonium cinnamoneum (Greville) Mann, 1937 (uncertain > unassessed)
14. Species Trigonium condecorum (Ehrenberg) Hendey (uncertain > unassessed)
15. Species Trigonium contumax Mann, 1925 (uncertain > unassessed)
16. Species Trigonium coscinoides (Grove & Sturt) Mann, 1907 accepted as Triceratium coscinoides var. coscinoides Grove & Sturt, 1886 (uncertain > unassessed)
17. Species Trigonium crenulatum (Grove & Sturt) Hustedt in Schmidt et al., 1959 accepted as Triceratium crenulatum f. crenulatum Grove & Sturt, 1887 (uncertain > unassessed)
18. Species Trigonium cucullatum (Pantocsek) Hustedt in Schmidt et al., 1959 accepted as Triceratium cucullatum var. cucullatum Pantocsek, 1889 (uncertain > unassessed)
19. Species Trigonium demissum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
20. Species Trigonium diaphanum A.Mann, 1925 (uncertain > unassessed)
21. Species Trigonium dissimile (Grunow in Schmidt et al.) Mann, 1925 accepted as Triceratium dissimile Grunow in Schmidt et al., 1885 (uncertain > unassessed)
22. Species Trigonium dobreeanum (G.Norman ex Greville) Hustedt, 1959 accepted as Triceratium dobreeanum var. dobreeanum Norman ex Greville, 1865 (uncertain > unassessed)
23. Species Trigonium dulce (Greville) Mann, 1925 accepted as Triceratium dulce var. dulce Greville, 1866 (uncertain > unassessed)
24. Species Trigonium eulensteinii (Grunow in Schmidt et al.) Mann, 1925 accepted as Triceratium eulensteinii var. eulensteinii Grunow in Schmidt et al., 1882 (uncertain > unassessed)
25. Species Trigonium formosum (Brightwell) Cleve, 1867 accepted as Triceratium formosum f. formosum Brightwell, 1856 (uncertain > unassessed)
26. Species Trigonium frauenfeldii (Grunow in Van Heurck) Mann, 1925 accepted as Triceratium frauenfeldii Grunow in Van Heurck, 1883 (uncertain > unassessed)
27. Species Trigonium gallapagense (Cleve) Desikachary & Sreelatha, 1989 accepted as Triceratium gallapagense Cleve, 1881 (uncertain > unassessed)
28. Species Trigonium geminum (Schmidt in Schmidt et al.) Mann, 1925 accepted as Triceratium geminum Schmidt in Schmidt et al., 1882 (uncertain > unassessed)
29. Species Trigonium glandarium (Schmidt in Schmidt et al.) Hustedt in Schmidt et al., 1959 accepted as Triceratium glandarium Schmidt in Schmidt et al., 1888 (uncertain > unassessed)
30. Species Trigonium glandiferum (Grunow) Hustedt, 1959 accepted as Triceratium glandiferum Grunow, 1888 (uncertain > unassessed)
31. Species Trigonium gracillimum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
32. Species Trigonium graeffeanum (Witt) Hendey, 1971 (uncertain > unassessed)
33. Species Trigonium haitianum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
34. Species Trigonium hertleinii (Hanna) V.A. Nikolaev & E. Fourtanier in Nikolaev, V.A., Kociolek, J.P., Fourtanier, E., Barron, J.A. & Harwood, D.M., 2001 accepted as Triceratium hertleini Hanna, 1927 (uncertain > unassessed)
35. Species Trigonium heteroporum (Grunow in Van Heurck) Mann, 1925 accepted as Triceratium heteroporum Grunow in Van Heurck, 1883 (uncertain > unassessed)
36. Species Trigonium inglorium (Greville) Mann, 1925 accepted as Triceratium inglorium Greville, 1865 (uncertain > unassessed)
37. Species Trigonium latum (Grev.) A. Mann, 1925 accepted as Triceratium latum var. latum Greville, 1865 (uncertain > unassessed)
38. Species Trigonium lautourianum (Grove ex Tempère) Hustedt in Schmidt et al., 1959 accepted as Triceratium lautourianum Grove in Bergon et al., 1890 (uncertain > unassessed)
39. Species Trigonium lineatum (Greville) Desikachary & Sreelatha, 1989 accepted as Triceratium lineatum f. lineatum Greville, 1863 (uncertain > unassessed)
40. Species Trigonium luculentum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
41. Species Trigonium mamillanum Debes ex Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
42. Species Trigonium mammiferum (Grunow in Van Heurck) Hustedt in Schmidt et al., 1959 accepted as Triceratium mammiferum f. mammiferum Grunow in Van Heurck, 1883 (uncertain > unassessed)
43. Species Trigonium membranaceum (Cleve) Mann, 1925 accepted as Biddulphia membranacea Cleve, 1878 (uncertain > unassessed)
44. Species Trigonium moronense (Greville) Desikachary, 1989 accepted as Triceratium moronense var. moronense Greville, 1865 (uncertain > unassessed)
45. Species Trigonium multifrons (uncertain > unassessed)
46. Species Trigonium multiplex (Janisch in Schmidt et al.) Mann, 1925 accepted as Triceratium multiplex f. multiplex Janisch in Schmidt et al., 1882 (uncertain > unassessed)
47. Species Trigonium oamaruense (Grove & Sturt) Mann, 1937 accepted as Triceratium oamaruense var. oamaruense Grove & Sturt, 1887 (uncertain > unassessed)
48. Species Trigonium obtusangulum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
49. Species Trigonium officiosum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
50. Species Trigonium parallelum (Ehrenberg) Mann, 1907 accepted as Amphitetras parallela Ehrenberg, 1840 (uncertain > unassessed)
51. Species Trigonium pardus (Schmidt in Schmidt et al.) Mann, 1925 accepted as Triceratium pardus Schmidt in Schmidt et al., 1882 (uncertain > unassessed)
52. Species Trigonium pilchrum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
53. Species Trigonium planoconcavum (Brun in Brun & Tempère) Mann, 1907 accepted as Triceratium planoconcavum var. planoconcavum Brun in Brun & Tempère, 1889 (uncertain > unassessed)
54. Species Trigonium propium (Pantocsek) Hustedt in Schmidt et al., 1959 accepted as Triceratium proprium Pantocsek, 1892 (uncertain > unassessed)
55. Species Trigonium punctatum (Brightwell) A.Mann, 1925 accepted as Triceratium punctatum f. punctatum Brightwell, 1856 (uncertain > unassessed)
56. Species Trigonium quadratum (Greville) Hustedt in Schmidt et al., 1959 accepted as Triceratium quadratum R.K.Greville, 1865 † accepted as Entogoniopsis lineolata (R.K.Greville) J.Witkowski, P.A.Sims, N.I.Strelnikova & D.M.Williams, 2015 † (uncertain > unassessed)
57. Species Trigonium quinquelobatum (Greville) Mann, 1925 accepted as Triceratium quinquelobatum Greville, 1866 (uncertain > unassessed)
58. Species Trigonium radfordianum (Castracane) Mann, 1925 accepted as Stictodiscus radfordianus Castracane, 1886 (uncertain > unassessed)
59. Species Trigonium radiolatum (Janisch in Schmidt et al.) Mann, 1925 accepted as Triceratium radiolatum Janisch in Schmidt et al., 1890 (uncertain > unassessed)
60. Species Trigonium radiopunctatum (Schmidt in Schmidt et al.) Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
61. Species Trigonium repletum Peragallo & Peragallo, 1908 (uncertain > unassessed)
62. Species Trigonium reticulum (Ehrenberg) Simonsen, 1974 accepted as Triceratium reticulum f. reticulum Ehrenberg, 1844 (uncertain > unassessed)
63. Species Trigonium rusticum Mann, 1907 (uncertain > unassessed)
64. Species Trigonium sculptum (Shadbolt) Mann, 1907 accepted as Triceratium sculptum var. sculptum Shadbolt, 1854 (uncertain > unassessed)
65. Species Trigonium sentum (Witt in Schmidt et al.) Hustedt in Schmidt et al., 1959 accepted as Triceratium sentum f. sentum Witt in Schmidt et al., 1890 (uncertain > unassessed)
66. Species Trigonium sparsipunctatum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
67. Species Trigonium striolatum (Ehrenberg) A.Mann, 1907 accepted as Triceratium striolatum Ehrenberg, 1840 (uncertain > unassessed)
68. Species Trigonium subcapitatum (Greville) Hustedt in Schmidt et al., 1959 accepted as Triceratium subcapitatum var. subcapitatum Greville, 1863 (uncertain > unassessed)
69. Species Trigonium subofficiosum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
70. Species Trigonium taeniatum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
71. Species Trigonium trinitas (Brun in Schmidt et al.) Mann, 1907 accepted as Triceratium trinitas var. trinitas Brun in Schmidt et al., 1891 (uncertain > unassessed)
72. Species Trigonium udiensis Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
73. Species Trigonium undatum (Grunow) Hustedt in Schmidt et al., 1959 accepted as Triceratium undatum Grunow, 1887 (uncertain > unassessed)
74. Species Trigonium venulosum (uncertain > unassessed)
75. Species Trigonium verecundum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
76. Species Trigonium veterarium Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
77. Species Trigonium vetustum Hustedt in Schmidt et al., 1959 (uncertain > unassessed)
78. Species Trigonium wetzelii (Hustedt in Wetzel) Hustedt in Schmidt et al., 1959 accepted as Triceratium wetzelii Hustedt ex Wetzel, 1935 (uncertain > unassessed)
79. Species Trigonium zonulatum (Greville) Mann, 1907 accepted as Triceratium zonatulatum f. zonulatum Greville, 1865 (uncertain > unassessed)

marine, terrestrial

Cleve, P.T. (1867). Diatomaceer från Spetsbergen. Öfversigt af Kongliga Svenska Vetenskaps-Akademiens Förhandlingar, Stockholm, 24(10): 661-670, pl. 23 [details]   

Kociolek, J.P.; Blanco, S.; Coste, M.; Ector, L.; Liu, Y.; Karthick, B.; Kulikovskiy, M.; Lundholm, N.; Ludwig, T.; Potapova, M.; Rimet, F.; Sabbe, K.; Sala, S.; Sar, E.; Taylor, J.; Van de Vijver, B.; Wetzel, C.E.; Williams, D.M.; Witkowski, A.; Witkowski, J. (2024). DiatomBase. Trigonium P.T. Cleve, 1867. Accessed through: Marine Species Traits editorial board (2024) Marine Species Traits at: https://www.marinespecies.org/traits./aphia.php?p=taxdetails&id=254445 on 2024-05-16

Marine Species Traits editorial board (2024). Marine Species Traits. Trigonium P.T. Cleve, 1867. Accessed at: https://www.marinespecies.org/traits/aphia.php?p=taxdetails&id=254445 on 2024-05-16

[taxonomic tree]