Van Heurck -- Synopsis des Diatomées de Belgique -- Index
| Biddulphia | abyssorum = Triceratium abyssorum Grunow | Page -- | Plate 113 | Figure 1,2 | |
| Biddulphia | alternans (Bailey) Van Heurck | Page 208 | Plate 113 | Figure 4,5,7 | |
| Biddulphia | antediluviana (Ehrenb.) Van Heurck = Triceratium antediluvianum (Ehrenb.) Grunow | Page 207 | Plate 109 | Figure 4,5 | Note 18 |
| Biddulphia | antediluviana var. pentagona | Page 207 | Plate -- | Figure ? | |
| Biddulphia | aurita (Lyngb.) Bréb. | Page 205 | Plate 98 | Figure 4,5,6,7,8,9 | |
| Biddulphia | aurita var. minima [i.e. miniscula?] Grunow | Page -- | Plate 98 | Figure 11,12,13 | Note 19 |
| Biddulphia | aurita var. minima Grunow | Page 205 | Plate 98 | Figure 10 | Note 20 |
| Biddulphia | baileyi W. Sm. = Biddulphia mobiliensis (Bailey) Grunow | Page 205 | Plate 101 | Figure 4,5,6 | Note 21 |
| Biddulphia | balaena Ehrenb. var. ? = Triceratium arcticum f. campechiana Grunow | Page -- | Plate 112 | Figure 1 | |
| Biddulphia | birostrata Grunow = Anaulus birostratus (Grunow) Grunow | Page -- | Plate 103 | Figure 1,2 | |
| Biddulphia ? | cristata Grunow | Page -- | Plate 102 | Figure 4 | Note 22 |
| Biddulphia | decipiens Grunow | Page -- | Plate 100 | Figure 3,4 | |
| Biddulphia | discigera Grunow | Page -- | Plate 108 | Figure 9 | Note 23 |
| Biddulphia | divisa = Triceratium divisum Grunow | Page -- | Plate 113 | Figure 8 | |
| Biddulphia | edwardsii Febiger | Page -- | Plate 100 | Figure 9,10 | |
| Biddulphia ? | eximia Grunow = Syringidium eximium Grunow | Page -- | Plate 106 | Figure 1,3 | |
| Biddulphia | favus (Ehrenb). Van Heurck = Triceratium favus Ehrenb. | Page 208 | Plate 107 | Figure 1,2,3,4 | Note 24 |
| Biddulphia | frauenfeldii Grunow = Triceratium frauenfeldii Grunow | Page -- | Plate 110 | Figure 10 | |
| Biddulphia | granulata Roper | Page 206 | Plate 99 | Figure 7,8 | Note 25 |
| Biddulphia | heibergii = Triceratium heibergii Grunow | Page -- | Plate 112 | Figure 9,10,11 | |
| Biddulphia | heteroceros Grunow | Page -- | Plate 102 | Figure 5 | |
| Biddulphia | heteropora Grunow = Triceratium heteroporum Grunow | Page -- | Plate 112 | Figure 2 | |
| Biddulphia | inelegans var. araeopora Grunow = Triceratium inelegans var. araeopora Grunow | Page -- | Plate 110 | Figure 2 | |
| Biddulphia | inelegans var. micropora Grunow = Triceratium inelegans var. micropora Grunow | Page -- | Plate 110 | Figure 3 | |
| Biddulphia | inelegans var. ? nicobarica Grunow = Triceratium inelegans var. ? nicobarica Grunow | Page -- | Plate 111 | Figure 7 | |
| Biddulphia | inelegans var. ? yucatensis Grunow = Triceratium inelegans var.? yucatensis Grunow | Page -- | Plate 110 | Figure 4,5 | |
| Biddulphia | irregularis var. hebetata Grunow = Triceratium irregulare var. hebetata Grunow | Page -- | Plate 111 | Figure 10 | |
| Biddulphia | laevis Ehrenb. | Page 206 | Plate 104 | Figure 3,4 | |
| Biddulphia | laevis f. minor Van Heurck | Page 207 | Plate 105 | Figure 3,4 | |
| Biddulphia | laevis W. Sm. nec Ehrenb. = Navicula laevis Ehrenb. | Page -- | Plate 104 | Figure 3,4 | Note 26 |
| Biddulphia | longicruris var. japonica Grunow | Page -- | Plate 100 | Figure 7 | |
| Biddulphia | longicruris var. leptoceros Grunow | Page -- | Plate 101 | Figure 1 | |
| Biddulphia | longispina Grunow | Page -- | Plate 102 | Figure 6 | |
| Biddulphia | mobiliensis (Bailey) Grunow | Page -- | Plate 101 | Figure 4,5,6 | |
| Biddulphia | mobiliensis (Bailey) Grunow | Page -- | Plate 103 | Figure A | |
| Biddulphia | moronensis var. nicobarica Grunow = Triceratium moronense var. nicrobarica Grunow | Page -- | Plate 110 | Figure 6 | |
| Biddulphia | multicornis Grunow | Page -- | Plate 102 | Figure 7 | |
| Biddulphia | nancoorensis = Triceratium nancoorense Grunow | Page -- | Plate 113 | Figure 9,11 | |
| Biddulphia | obliqua Grunow = Triceratium obliquum Grunow | Page -- | Plate 110 | Figure 11 | |
| Biddulphia | obtusa (Kütz.) Ralfs | Page -- | Plate 100 | Figure 11,12,13,14 | |
| Biddulphia ? | parallela var. sparsa Grunow = Triceratium parallelum var. sparsa Grunow | Page -- | Plate 111 | Figure 1 | |
| Biddulphia | peruviana Grunow | Page -- | Plate 101 | Figure 2,3 | |
| Biddulphia | plicata = Triceratium plicatum Grunow | Page -- | Plate 113 | Figure 10 | |
| Biddulphia | pulchella Gray | Page 204 | Plate 97 | Figure 1,2,3,4,5 | |
| Biddulphia | punctata f. pentagona Grunow = Triceratium punctata f. pentagona Grunow | Page -- | Plate 109 | Figure 6 | |
| Biddulphia | punctata f. tetragona, minuta Grunow = Triceratium punctatum f. tetragona, minuta [Grunow] | Page -- | Plate 109 | Figure 9 | |
| Biddulphia | punctata f. trigona, minuta Grunow = Triceratium punctatum f. trigona, minuta Grunow | Page -- | Plate 109 | Figure 10 | |
| Biddulphia | quinquelocularis Kütz. = Biddulphia pulchella Gray | Page -- | Plate 97 | Figure 1,2,3 | |
| Biddulphia | radiata (Brightw.) Grunow = Triceratium radiatum Brightw. | Page -- | Plate 112 | Figure 8 | |
| Biddulphia | radiata Roper = Biddulphia smithii (Ralfs) Van Heurck | Page -- | Plate 105 | Figure 1,2 | Note 27 |
| Biddulphia | radioso-reticulata Grunow = Triceratium radioso-reticulatum Grunow | Page -- | Plate 112 | Figure 5 | |
| Biddulphia | regina W. Sm. | Page -- | Plate 98 | Figure 1 | |
| Biddulphia | repleta var. balearica Grunow = Triceratium repletum var. nicobarica Grunow | Page -- | Plate 110 | Figure 7 | |
| Biddulphia | reticulata Roper | Page -- | Plate 102 | Figure 1,2 | |
| Biddulphia | reticulata var. trigona Grunow | Page -- | Plate 102 | Figure 3 | |
| Biddulphia | rhombus (Ehrenb.) W.Sm. | Page 205 | Plate 99 | Figure 1,3 | |
| Biddulphia | rhombus var. trigona Cleve | Page 205 | Plate 99 | Figure 2 | |
| Biddulphia | roperiana Grev. | Page -- | Plate 99 | Figure 4,5,6 | |
| Biddulphia | sculpta (Shadbolt) Van Heurck = Triceratium sculptum Shadbolt | Page 208 | Plate 109 | Figure 7,8 | |
| Biddulphia | sculpta var.? petropolitana Grunow = Triceratium sculptum var. petropolitana Grunow | Page -- | Plate 111 | Figure 8 | |
| Biddulphia | septemlocularis Kütz. = Biddulphia pulchella Gray | Page -- | Plate 97 | Figure 1,2,3 | |
| Biddulphia | seticulosa Grunow | Page -- | Plate 101 | Figure 7,8 | |
| Biddulphia | seychellensis Grunow = Triceratium seychellense Grunow | Page -- | Plate 110 | Figure 1 | |
| Biddulphia | smithii (Ralfs) Van Heurck | Page 207 | Plate 105 | Figure 1,2 | |
| Biddulphia | subaequa var. baltica Grunow | Page -- | Plate 100 | Figure 5,6 | |
| Biddulphia | sublaevis Grunow | Page -- | Plate 100 | Figure 8 | |
| Biddulphia | suborbicularis Grunow | Page -- | Plate 100 | Figure 15,16 | |
| Biddulphia ? | titiana Grunow | Page -- | Plate 95bis | Figure 7,8,9 | |
| Biddulphia | trilocularis Kütz. = Biddulphia pulchella Gray | Page -- | Plate 97 | Figure 1,2,3 | |
| Biddulphia | tripartita Grunow = Triceratium tripartitum Grunow | Page -- | Plate 110 | Figure 8 | |
| Biddulphia | tumida var. ? peruviana Grunow = Biddulphia peruviana Grunow | Page -- | Plate 101 | Figure 2,3 | |
| Biddulphia | tuomeyi (Bailey) Roper | Page -- | Plate 98 | Figure 2,3 | |
| Biddulphia | turgida W. Sm. = Cerataulus turgidus Ehrenb. | Page -- | Plate 104 | Figure 1,2 | Note 28 |
| Biddulphia | venosa var. = Triceratium venosum Brightw. var. | Page -- | Plate 113 | Figure 3 | |
| Biddulphia | weissflogii C.Janisch | Page -- | Plate 100 | Figure 1,2 | Note 29 |