Geragnostus Howell 1935 (artiopod)

Artiopoda - Agnostida - Metagnostidae

Synonym: Neptunagnostella Pek 1977

Parent taxon: Metagnostidae according to O. A. Hoel 1999

See also Harrington and Leanza 1957, Jell and Adrain 2002, Neuman 1964, Robison and Pantoja-Alor 1968, Sepkoski 2002 and Whittington et al. 1997

Sister taxa: Anglagnostus, Arthrorhachis, Chatkalagnostus, Corrugatagnostus, Dividuagnostus, Galbagnostus, Geragnostella, Granuloagnostus, Homagnostoides, Trinodus

Subtaxa: Geragnostus (Geragnostella) Geragnostus (Geragnostus) Geragnostus (Microagnostus) Geragnostus (Novoagnostus) Geragnostus boutouryensis Geragnostus callaveiformis Geragnostus crassus Geragnostus fabius Geragnostus occitanus

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Ecology: slow-moving epifaunal detritivore

Distribution:

• Ordovician of Argentina (47 collections), Australia (4), Canada (7: Alberta, Newfoundland, Newfoundland and Labrador, Northwest Territories, Northwest Terrorities), China (42), Colombia (1), the Czech Republic (4), Estonia (2), France (6), Iran (2), Mexico (1), Morocco (1), Norway (9), Portugal (1), the Russian Federation (3), Spain (5), Sweden (11), the United Kingdom (5), United States (20: California, Maine, Montana, Nevada, New Mexico, Texas, Vermont)

• Llandeilo of China (3), the United Kingdom (2)

• Whiterockian of Canada (9: Newfoundland and Labrador)

• Dawan of China (1)

• Arenigian of China (4), France (2)

• Arenig of Bolivia (1), Canada (2: Newfoundland and Labrador), China (11), France (2), Sweden (4), the United Kingdom (1)

• Klabava of the Czech Republic (2), France (1)

• Cambrian of Australia (1), China (5), United States (10: Alaska, Montana, Nevada, New Mexico, Texas, Utah)

Total: 232 collections including 260 occurrences

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