Trilobita - Phacopida - Encrinuridae

Full reference: R. A. Fortey. 1980. The Ordovician trilobites of Spitsbergen. III. Remaining trilobites of the Valhallfonna Formation. Norsk Polarinstitutt Skrifter 171:1-163

Parent taxon: Encrinuridae according to P. A. Jell and J. M. Adrain 2003

Sister taxa: Atractopyge, Avalanchurus, Balizoma, Batocara, Billevittia, Coronocephalus, Cromus, Curriella, Cybele, Cybeloides, Cybelurus, Deacybele, Dindymene, Distyrax, Encrinurinae, Encrinuroides, Encrinurus, Erratencrinurus, Fragiscutum, Frammia, Kailia, Mackenziurus, Nucleurus, Oedicybele, Paracybeloides, Perryus, Plasiaspis, Prostrix, Rongxiella, Senticucullus, Sinocybele, Staurocephalus, Stiktocybele, Struszia

Subtaxa: Lyrapyge areonosa, Lyrapyge ebriosus

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Type: Lyrapyge ebriosus

Ecology: fast-moving low-level epifaunal carnivore