Micragnostus Howell 1935 (artiopod)

Artiopoda - Agnostida - Agnostidae

Alternative spelling: Geragnostus (Micragnostus)

Parent taxon: Agnostidae according to J.-S. Bao and J.B. Jago 2000

See also Lu and Lin 1989, Sepkoski 2002 and Whittington et al. 1997

Sister taxa: Acmarhachis, Agnostinae, Agnostus, Aistagnostus, Barrandagnostus, Biciragnostus, Connagnostus, Eurudagnostus, Formosagnostus, Gymnagnostus, Hadragnostus, Homagnostus, Idolagnostus, Ivshinagnostus, Kormagnostella, Kormagnostus, Kymagnostus, Lotagnostus, Neoagnostus, Oncagnostus, Oxyagnostus, Peronopsinae, Ptychagnostinae, Quadrahomagnostus, Semagnostus, Strictagnostus, Trilobagnostus

Subtaxa: Geragnostus (Micragnostus) acrolebes Geragnostus (Micragnostus) bilobus Geragnostus (Micragnostus) chengcunensis Micragnostus brevispinus Micragnostus calviformis Micragnostus calvus Micragnostus chiushuensis Micragnostus curvata Micragnostus elongatus Micragnostus insolitus Micragnostus mutabilis Micragnostus orientalis Micragnostus pehuenchensis Micragnostus quadratiformis Micragnostus serus Micragnostus strictus Micragnostus vilonii

View classification

Type: Agnostus calvus

Ecology: slow-moving epifaunal detritivore

Distribution:

• Arenigian of France (1 collection)

• Arenig of Argentina (2), Norway (1)

• Ordovician of Argentina (1), Australia (1), Canada (1: Newfoundland and Labrador), Norway (1), the United Kingdom (4)

• Cressagian of the United Kingdom (2)

• Tremadoc of Argentina (2), Bolivia (6), Canada (7: Alberta, Northwest Territories), Mexico (23)

• Ibexian of Norway (3)

• Cambrian of Argentina (27), Australia (10), Canada (13: Alberta, Newfoundland and Labrador, Yukon), China (14), Kazakhstan (44), South Korea (5), Turkey (2), the United Kingdom (2), United States (2: Wyoming)

• Taoyuanian of China (8), the Russian Federation (3), South Korea (17)

Total: 202 collections including 219 occurrences

Show more details


Specimen images are retrieved through the ePANDDA API.


Click image to enlarge. Click to access iDigBio record.