†family Ptychagnostidae Kobayashi 1939 (trilobite)

Trilobita - Agnostida - Ptychagnostidae

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

See also Hong et al. 2003 and Westrop et al. 1996

Sister taxa: Agnostidae, Agnostina, Agnostogonus, Agnostoidea, Aistagnostus, Allobodochus, Ammagnostidae, Aotagnostus, Armagnostus, Blystagnostus, Calodiscidae, Ceragnostus, Chatkalagnostus, Chelediscus, Clavagnostidae, Condylopygidae, Cristagnostus, Delagnostus, Dicerodiscus, Dignagnostus, Dipharus, Dividuagnostus, 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, Quadrahomagnostinae, Rhodotypiscus, Semadiscus, Skryjagnostus, Sphaeragnostidae, Spinagnostidae, Stigmadiscus, Tasagnostus, Tchernyshevioides, Triangulina, Tsunyidiscidae, Valenagnostus, Weymouthiidae, Xyoeax, Yukonia, Yukonides, Yukoniidae

Subtaxa: Acidusus Goniagnostus Lejopyge Myrmecomimus Onymagnostus Pentagnostus Ptychagnostus Tomagnostus Triplagnostus Yakutiana Zeteagnostus

View classification

Ecology: slow-moving epifaunal detritivore

Distribution:

• Arenig of Norway (1 collection)

• Ayusokkanian of Kazakhstan (18)

• Marjumian of Canada (8: Newfoundland and Labrador), Greenland (4), United States (5: New York, South Carolina, Utah)

• Cambrian of Antarctica (1), Argentina (3), Australia (2), Canada (47: British Columbia, New Brunswick, Newfoundland and Labrador), China (140), the Czech Republic (3), Denmark (2), Greenland (1), India (4), Italy (1), Kazakhstan (32), North Korea (1), Norway (6), Poland (1), the Russian Federation (6), the United Kingdom (4), United States (39: Alaska, Montana, Nevada, Utah, Vermont)

Total: 329 collections including 578 occurrences

Show more details