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Trilobite
Tier 1
Phacops
Asaphus kowaleskii
Elrathia kingii
Tier 2
Walliserops
Excursions on land
Calymene
Psychopyge
Tier 3
Agnostida
Isotelus
Lichida
Genal spines
Pygidium
Trilobite volvation
Tier 4
Librostoma
Agnostids aren't Trilobites
Harpetida
Hypostome
Arctinurus
Odontopleurids are lichids
Trinucleioidea
Precambrian origin
Richard fortey
Tier 5
Aulacopleurida
Nektaspids are Trilobites
Encrinurus
Styginidae
Triarthrus eatoni
Phillipsiidae
Trinucleoids aren't asaphids
Han solo
Tier 6
Sam Gon
Swimming trilobites
Terataspis grandis
Balcoracania
Tier 7
Acanthopleurella stipulae
Agnostid polyphyly
Telephinidae
Miomera & Polymera
Frasnian harpetids
Entomaspididae
Wenban trilobites
Triassic Trilobite Traces
Shumardiidae
Leiostegiina
Tier 8
Pemphigaspis
Harpillaenus
Condylopygoidea
Weymouthiidae
Cambroproteus
Gondwanaspis
Lichid below-family relationships
Thoracocare
Bathynotidae
Burlingiidae
FishIDK
Animals & Nature
54
54
04 Mar 2026
04 Mar 2026
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