138 Tessella punctata/2178 Tessella spp./2137, 2139 Tetracyclus emarginatus/1033 Tetracyclus lacustris/1525, E364, E365, E366, E380 Tetragramma americana/1860, 1867, 1916 Tetragramma spp./778, 887, 914, 1591, 1593, 2137, 2139 Toxarium undulatum/1470, 1471 Toxarium sp./1471 Triceratium alternans/919, 921, 923, 1527 Triceratium amblyoceros/1128, 1129, 1132, 1139, 1140, 1142, 1146, 1160, 1676 Triceratium anptra/2178 Triceratium arcticum/1006 Triceratium armatum/1047 Triceratium castallum/1198, 1207 Triceratium concavum/2178, 2182, 2184 Triceratium crenatum/1167, 1173 Triceratium favus/572, 578, 616, 617, 791, 860, 867, 1531, 1598, 1607, 1733, 1864, 1871, 1884, 1915, 1976, 1987, 1994, 2021, 2089, 2180 Triceratium gibbosum/2178, 2181 Triceratium interruptum/791 TrIceratium marginatum/1199 Triceratium obtusatum/1128, 1129, 1155 Triceratium obtusum/2184 Triceratium parma/572, 577-579, 584, 585, 596, 599, 600, 606, 611 Triceratium setigerum/576, 577, 589, 596, 598, 617, 860, 1903, 1906, 2088 Triceratium shadboltii/884, 891, 893, 894, 912, 914, 920, 922 Triceratium solenoceros/1164, 1167, 1173, 1177 Triceratium striolatum/1046 Triceratium trisulcum/586 Triceratium undulatum/1164, 1167, 1173, 1177, 1528 Triceratium venosum/1200 Triceratium wilkesii/743, 755, 769, 794, 815, 827 Triceratium spp./572, 665, 691, 767, 779, 784, 867, 907, 912, 1079, 1096, 1129, 1146, 1157, 1164, 1167, 1177, 1182, 1186, 1197, 1209, 1466, 1528, 1665, 1726, 1786, 1788, 2137, 2139, 2140, 2161, 2175, 2178-2181, 2183, 2185 Tryblionella acuminata/1484 Tryblionella gracilis/1477 Tryblionella marinata/1475 Tryblionella scutellum/1901 Tryblionella sp./1484 Xanthiopyxis alata/1133 Xanthiopyxis oblonga/1172 Xanthiopyxis serrata/753-755, 759, 768, 770, 777, 783, 789 Xanthiopyxis spp./757, 760, 771, 777, 925 Zygoceros bipons/1167, 1173 Zygoceros circularis/ Zygoceros hemitropa/895, 903, 922