†subfamily Hillyardininae Adrain and Westrop 2007 (trilobite)

Artiopoda - Proetida - Hystricuridae

Full reference: J. M. Adrain and S. R. Westrop. 2007. The hystricurid trilobite Metabowmania in the Lower Ordovician (Ibexian; Stairsian) of the Great Basin, Utah and Idaho, USA. Memoirs of the Association of Australasian Palaeontologists 34:227-242

Parent taxon: Hystricuridae according to J. M. Adrain and S. R. Westrop 2007

Sister taxa: Amblycranium, Etheridgaspis, Glabretina, Guizhouhystricurus, Hintzecurinae, Holubaspis, Hystricurinae, Hystricurus, Litzicurus, Millardicurus, Nyaya, Omuliovia, Paenebeltella, Parahystricurus, Paraplethopeltis, Psalikilus, Rollia, Svalbardicurus, Taoyuania, Tasmanaspis

Subtaxa: Hillyardina Hyperbolochilus Metabowmania Pachycranium Tanybregma

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Ecology: fast-moving low-level epifaunal deposit feeder

Distribution:

• Arenig of Argentina (1 collection)

• Ordovician of Australia (2), Canada (30: Alberta, Newfoundland, Newfoundland and Labrador), United States (19: Idaho, Nevada, Utah)

• Skullrockian of Canada (1: Newfoundland)

Total: 53 collections including 75 occurrences

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