Trigonocerca Ross, Jr. 1951 (trilobite)

Trilobita - Asaphida - Asaphidae

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: Asaphidae according to P. A. Jell and J. M. Adrain 2002

See also Sepkoski 2002

Sister taxa: Anataphrus, Araiocaris, Asaphellus, Asaphinae, Atopasaphus, Aulacoparia, Australopyge, Basilicus, Bellefontia, Birmanites, Bohemopyge, Brachyaspis, Branisaspis, Burminresia, Emanuelaspis, Eoasaphus, Eoisotelus, Fuyunia, Gerasaphes, Griphasaphus, Guohongjunia, Hemigyraspis, Homotelus, Hunnebergia, Isabelinia, Isotelinae, Kayseraspis, Klabavia, Kobayashia, Lachnostoma, Liomegalaspides, Lisogorites, Megalaspidella, Merlinia, Metaptychopyge, Mioptychopyge, Nahannia, Nerudaspis, Nileoides, Ningkianites, Niobella, Niobides, Niobina, Niobinae, Nobiliasaphus, Norinia, Ogmasaphus, Ogygiinae, Ogyginus, Ogygiocarella, Ogygiocaris, Ogygites, Ogygitoides, Onchometopus, Parabellefontia, Paramegalaspis, Paratamdaspis, Penchiopsis, Plectasaphus, Presbynileus, Priceaspis, Promegalaspidinae, Proscharyia, Protopresbynileus, Protoptychopyge, Pseudasaphus, Pseudoasaphus, Pseudogriphasaphus, Pseudogygites, Psilocephalina, Ptychopyge, Ptychopyginae, Ptyocephalus, Sanbernardaspis, Schizophorus, Stegnopsis, Stenorhachis, Suriaspis, Thysanopyge, Trigonocercella, Vogdesia, Xenostegium, Zhenganites, Zuninaspis

Subtaxa: Trigonocerca typica

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Type: Trigonocerca typica

Ecology: fast-moving low-level epifaunal deposit feeder

Distribution:

• Ordovician of Canada (1: Alberta collection), United States (33: California, Idaho, Nevada, Utah)

Total: 34 collections each including a single occurrence

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