Hillyardina Ross, Jr. 1951 (trilobite)

Trilobita - Aulacopleurida - Hystricuridae

Full reference: R. J. Ross, Jr. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161

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

See also Adrain et al. 2003, Jell and Adrain 2002 and Sepkoski 2002

Sister taxa: Hyperbolochilus, Metabowmania, Pachycranium, Tanybregma

Subtaxa: Hillyardina levis Hillyardina marginauctum Hillyardina minuspustulata Hillyardina semicylindrica Hillyardina tasmaniensis

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Type: Hillyardina semicylindrica

Ecology: fast-moving low-level epifaunal carnivore


• Ordovician of Australia (1 collection), Canada (25: Alberta, Newfoundland, Newfoundland and Labrador), United States (8: Idaho, Nevada, Utah)

• Arenig of Argentina (1)

Total: 35 collections including 37 occurrences

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Specimen images are retrieved through the ePANDDA API.

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