†family Spinagnostidae Howell 1935

Trilobita - Agnostida - Spinagnostidae

Alternative spelling: Spinagnostiidae

Parent taxon: Agnostida according to H. B. Whittington et al. 1997

See also Landing et al. 2008

Sister taxa: Agnostidae, Agnostina, Agnostogonus, Agnostoidea, Aistagnostus, Allobodochus, Ammagnostidae, Aotagnostus, Armagnostus, Blystagnostus, Calodiscidae, Ceragnostus, Chatkalagnostus, Chelediscus, Clavagnostidae, Condylopygidae, Cristagnostus, Delagnostus, Dicerodiscus, Dignagnostus, Dipharus, Dolichoagnostus, Egyngolia, Eodiscidae, Eodiscina, Euagnostus, Formagnostus, Glaberagnostus, Glyptagnostidae, Grandagnostus, Granuloagnostus, Gratagnostus, Hastagnostus, Hebediscidae, Hebediscina, Itagnostus, Jinghediscus, Kiskinella, Kymagnostus, Lavsanodiscus, Lenadiscus, Litometopus, Megagnostus, Meniscuchus, Metagnostidae, Micagnostus, Miraculaspis, Monexagnostus, Ninadiscus, Oodiscus, Parapagetia, Peronopsidae, Phalacromidae, Phoidagnostus, Pleurinodus, Pseudocobboldia, Ptychagnostidae, Quadrahomagnostinae, Rhodotypiscus, Semadiscus, Skryjagnostus, Sphaeragnostidae, Stigmadiscus, Tasagnostus, Tchernyshevioides, Triangulina, Tsunyidiscidae, Valenagnostus, Weymouthiidae, Xyoeax, Yukonia, Yukonides, Yukoniidae

Subtaxa: Cotalagnostus Doryagnostus Eoagnostus Hypagnostus Peratagnostus Pseudoperonopsis Tomagnostella

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Distribution:

• Ordovician of Argentina (2 collections)

• Ayusokkanian of Kazakhstan (18)

• Marjumian of Canada (14: Newfoundland and Labrador), Greenland (6), United States (4: New York, South Carolina, Utah)

• Cambrian of Antarctica (1), Argentina (4), Australia (2), Canada (14: British Columbia, New Brunswick, Newfoundland and Labrador, Yukon), China (166), the Czech Republic (4), Denmark (1), France (1), Greenland (3), India (2), Kazakhstan (57), Norway (3), the Russian Federation (11), South Korea (18), the United Kingdom (3), United States (9: Alaska, New York, Pennsylvania, Utah, Vermont)

Total: 343 collections including 517 occurrences

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