Artiopoda - Agnostida - Metagnostidae
Synonym: Girvanagnostus Kobayashi 1939
Parent taxon: Metagnostidae according to O. A. Hoel 1999
See also Ahlberg 1989, Jell and Adrain 2002, Owen 1981, Sepkoski 2002 and Whittington et al. 1997
Sister taxa: Anglagnostus, Chatkalagnostus, Corrugatagnostus, Dividuagnostus, Galbagnostus, Geragnostella, Geragnostus, Granuloagnostus, Homagnostoides, Trinodus
Subtaxa: Arthrorhachis danica Arthrorhachis elliptifrons Arthrorhachis mobergi Arthrorhachis tarda Arthrorhachis tardus
Ecology: slow-moving epifaunal detritivore
Distribution:
• Billingen of Norway (1 collection)
• Arenig of the United Kingdom (2)
• Ordovician of Belgium (2), Canada (2: Northwest Territories, Yukon), China (7), the Czech Republic (2), Denmark (3), Ireland (1), Italy (2), Kazakhstan (1), Norway (7), Poland (1), Sweden (22), the United Kingdom (17), United States (5: Virginia)
• Ibexian of Norway (1), United States (1: California)
Total: 77 collections each including a single occurrence
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.