†subclass Libristoma Fortey 1990

Trilobita - Libristoma

Alternative spelling: Librostoma

Full reference: R. A. Fortey. 1990. Ontogeny, hypostome attachment and trilobite classification. Palaeontology 33(3):529-576

Parent taxon: Trilobita according to M. C. Ebach and K. J. McNamara 2002

See also Fortey 1990 and Hughes 1994

Sister taxa: Aglagalia, Agraulaeva, Aguaraya, Aldonaiidae, Altajaharpes, Amechilus, Amgaspididae, Ampellatocephalina, Anacopodia, Antagmidae, Antatlaeva, Atopidae, Auritamidae, Avoninidae, Batchatiella, Bathynotidae, Beikedamaspis, Bergerolimbus, Burlingiidae, Carmon, Changshaniidae, Chinensis, Corynexochida, Crossoura, Curiaspis, Cuyanaspis, Cyclolenzellina, Dalmanites troosti, Deltacare, Devonocoryphe, Edganocare, Elleria, Elleria morani, Ellipsocephaloididae, Ellipsuella, Entomostracites, Erbenochile, Eulomella, Eutrilobita, Fabulaspis, Faciura, Gentilaspis, Gigmpeltis, Goycoia, Harpetida, Helioproetoides, Holocephalinidae, Howelluella, Idiorapha, Ignotogregatidae, Indigestus, Irvingelloides, Ishpella, Isocolidae, Issafenia, Ityophoridae, Jamrogiidae, Jonotus, Juriietella, Kamlacus, Kanfuqingia, Leptopilus, Lichida, Llanoaspididae, Loxopeltis, Lusampa, Mapaniidae, Megalaspidicus, Meneghinella, Metapopristis, Monkaspididae, Moolatrilo, Moretaeva, Moretarva, Namanoiidae, Neochilonorria, Neomalungia, Neotaenicephalus, Nepeidae, Odontopleurida, Ogygiocaridinae, Olenida, Onchonotopsidae, Opisthoparia, Orictocara, Otekmaspis, Otenaspella, Paichiashania, Paleoaethia, Parakingaspidoides, Pararania, Peculicephalina, Perissopyge, Phacopida, Piliolites, Pliomerellus, Poculicephalina, Polycyrtaspididae, Prodamesella, Proetida, Proparia, Pseudoacicaudus, Pseudoclelandia, Pseudocrecephalaspina, Pseudosalteria, Pseudosarkia, Pseudotermierella, Ptyttstrigis, Punctaspis, Redlichiida, Remopleuridacea, Repinaella, Resseria, Resseropsis, Rochaeva, Sarkiidae, Serksia, Serksioides, Sibiriopeltis, Sphaerocare, Spizharaspis, Stittaspis, Sukhanaspis, Sunaspididae, Taidonurus, Taplimella, Tazemmourtia, Thymurus, Toxotis, Trapezocephalina, Triarthrella, Trilobus, Tuberaspis, Tuyunaspis, Ulrickaspis, Utiidae, Westergardia, Winsteria, Wuaniidae, Zigzuella

Subtaxa: Asaphida Ptychopariida Trinucleida

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Distribution:

• Silurian of Algeria (1 collection), Australia (1), Austria (1), Canada (3: Northwest Territories, Quebec), the Czech Republic (5), Italy (2), Morocco (2), the United Kingdom (4), United States (2: Arkansas, Georgia)

• Dobrotivian of the Czech Republic (4), France (8), Morocco (2), Portugal (3), Spain (11)

• Uhaku of Belarus (2), Latvia (1), Lithuania (2), Norway (24), the Russian Federation (3), Sweden (15)

• Liben of the Czech Republic (1)

• Letna of the Czech Republic (2)

• Whiterockian of Canada (55: Newfoundland, Newfoundland and Labrador, Northwest Territories, Quebec), China (6), Norway (4), United States (89: California, Nevada, New York, Oklahoma, Utah, Vermont)

• Chazyan of Canada (33: Newfoundland and Labrador, Northwest Territories, Ontario, Quebec), United States (64: California, New York, Oklahoma, Tennessee, Vermont)

• Fennian of France (1), United States (1: Nevada)

• Volkhov of Argentina (1), Estonia (2), Latvia (2), Lithuania (4), Norway (1), the Russian Federation (39), Sweden (52)

• Valaste of Sweden (11)

• Hunderum of Sweden (14)

• Langevoja of Sweden (27)

• Arenigian of Argentina (54), Canada (2: Northwest Territories), China (43), the Russian Federation (1), United States (7: Nevada, Utah)

• Klabava of the Czech Republic (2), France (2)

• Arenig of Argentina (13), Australia (29), Bolivia (11), Canada (3: Newfoundland and Labrador), China (126), France (6), Greenland (1), Iran (1), Morocco (3), Norway (5), the Russian Federation (2), Spain (1), Sweden (8), the United Kingdom (8), United States (8: Montana, Nevada, New York, North Dakota, Vermont)

• Dawan of China (8)

• Ordovician to Silurian of Canada (2: Québec)

• Ordovician of Argentina (110), Australia (79), Belarus (4), Belgium (4), Bolivia (6), Canada (201: Alberta, British Columbia, Manitoba, Newfoundland, Newfoundland and Labrador, Northwest Territories, Northwest Terrorities, Nunavut, Nunvait, Ontario, Quebec, Québec, Yukon), China (291), the Czech Republic (27), Estonia (20), Finland (1), France (14), Greenland (4), Iran (17), Ireland (29), Italy (3), Kazakhstan (11), Kyrgyzstan (2), Latvia (4), Lithuania (12), Morocco (30), the Netherlands (1), New Zealand (1), North Korea (1), Norway (333), Oman (2), Peru (3), Poland (2), Portugal (6), the Russian Federation (76), Saudi Arabia (1), South Korea (4), Spain (22), Sweden (229), Turkey (5), the United Kingdom (277), United States (1283: Alaska, British Columbia, California, Georgia, Idaho, Illinois, Illinois, Iowa, Indiana, Iowa, Iowa/Wisconsin, Kentucky, Maine, Maryland, Michigan, Minnesota, Missouri, Montana, Nevada, New Mexico, New York, North Dakota, Ohio, Oklahoma, Pennsylvania, Pennsylvania and Virginia, Tennessee, Texas, Utah, Virginia, Wisconsin, Wyoming), Venezuela (1), Vietnam (1)

• Canadian of Canada (3: Newfoundland, Newfoundland and Labrador, Northwest Territories), United States (3: Maryland, Utah)

• Tremadoc of Antarctica (1), Argentina (164), Bolivia (7), Canada (90: Alberta, Newfoundland and Labrador, Northwest Territories, Yukon), China (102), Colombia (2), the Czech Republic (3), France (7), Iran (13), Mexico (22), Morocco (2), Norway (2), the Russian Federation (14), Spain (3), Sweden (3), the United Kingdom (1), United States (7: Montana, Texas, Utah, Vermont, Virginia)

• Cressagian of South Korea (1), the United Kingdom (3)

• Ibexian of Norway (4), United States (13: California, Nevada)

• Skullrockian of Argentina (1), Canada (26: Alberta, British Columbia, Newfoundland), Greenland (1), United States (41: Nevada, New York, Texas, Utah)

• Taoyuanian of China (62), the Russian Federation (25), South Korea (59), Turkey (2)

• Amgan of the Czech Republic (3), Iran (1), Kazakhstan (4), Norway (1), the Russian Federation (3), United States (3: Alaska, Utah)

• Solvan of Canada (41: British Columbia, Newfoundland and Labrador), the Czech Republic (7), Greenland (1), Kazakhstan (1), the Russian Federation (1), Spain (1), United States (92: Nevada, Pennsylvania)

• Ordian of Australia (1)

• Delamaran of Canada (41: Alberta, British Columbia, New Brunswick, Northwest Territories), Mexico (3), Morocco (4), United States (203: California, California-Nevada, Idaho, Montana, Nevada, Nevada and California, Pennsylvania, Utah, Vermont, Virginia)

• Cambrian to Ordovician of Canada (1: Quebec), the Russian Federation (2)

• Waucoban of Canada (1: British Columbia), Greenland (1)

• Caerfai of United States (1: New York)

• Cambrian of Antarctica (8), Argentina (13), Australia (95), Canada (222: Alberta, Alberta-British Columbia, Brithish Columbia, British Columbia, New Brunswick, Newfoundland, Newfoundland and Labrador, Northwest Territories, Nunavut, Quebec, Yukon, Yukon Territory), China (531), the Czech Republic (14), Denmark (1), France (8), Germany (22), Greenland (26), India (34), Iran (7), Italy (1), Kazakhstan (146), Kyrgyzstan (1), Morocco (2), North Korea (1), Norway (7), Poland (2), the Russian Federation (107), South Korea (22), Spain (18), Sweden (1), Turkey (28), the United Kingdom (14), United States (846: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Georgia, Idaho, Idaho/ Utah, Indiana, Massachusetts, Minnesota, Missouri, Montana, Nevada, Nevada and Utah, New Mexico, New York, Oklahoma, Pennsylvania, South Dakota, Tennessee, Texas, Utah, Vermont, Virginia, Wisconsin, Wyoming, Wyoming-Montana), Vietnam (1)

Total: 7250 collections including 16469 occurrences

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