Trilobites Site Map

Trilobite Fossils Across the Orders:

Trilobite Taxonomic Orders: Order Agnostida, Order Redlichiida, Order Corynexochida, Order Phacopida, Order Lichida, Order Odontopleurida, Order Proetida, Order Harpetida, Order Ptychopariida, Order Asaphida, Order Nectaspida New Trilobites

Trilobite Systematics, Taxonomy and Phylogeny:

Trilobite Systematics

Trilobite Classification - Taxonomy by Order: Order Ptychopariida, Order Phacopida, Order Agnostida Order Proetida Order Asaphida Order Lichida Order Redlichiida

Trilobita Classification: All trilobite orders on one searchable page.

The Nine Orders of Arthropod Class Trilobita and Nectaspida, the so-called soft bodied trilobites:

Agnostida	Redlichiida	Corynexochida	Phacopida	Lichida	Odontopleurida	Proetida	Harpetida	Ptychopariida	Asaphida	Nectaspida

Topics Related to Trilobite Evolution:

Trilobite Evolution Trilobites & Geologic Time Origins Diversity Punctuated Equilibrium Trilobite Families Across Paleozoic Time Trilobites and Extinction Events Stealth and Defense Trilobite Relatives Trilobite Paleogeography

Topics Related to Trilobite Morphology, Body Plan, Phenotypic Traits and Development:

Trilobite Body Plan and Morphology Trilobite Eyes Trilobite Exoskeletons Trilobites Development and Ontogeny

Trilobite Sites and Localities:

American Trilobites Australian Trilobites Canadian Trilobites Chinese Trilobites European Trilobites Moroccan Trilobites Russian Trilobites Rare Trilobites

Trilobite Behavior and Lifestyles:

Trilobite Reproduction & Development Molting Trilobite Lifestyles

Trilobite Fossil Taphonomy and Preservation

Trilobite Soft Tissue Preservation

Trilobite Educational Resources:

Trilobites Teaching and Educational Resources Trilobite Terminology

Other Trilobite Topics:

Trilobite Literature and References Trilobites and Cladistics Trilobite Art Trilobite Maps Misc Topics Trilobite Preparation Trilobite Fossil Associations Trilobites of the Month

Trilobite Taxonomy

Trilobite Phylogeny

Phylum Arthropoda
Subphylum Chelicerata
or Subphylum Trilobitamorph
Superclass Arachnomorpha (1)
Class Trilobita

    Order Agnostida
    Order Redlichiida
    Order Corynexochida
    Order Phacopida
    Order Lichida
    Order Odontopleurida (2)
    Order Proetida
    Order Harpetida
    Order Ptychopariida
    Order Asaphida
    Order Nectaspida

o Arthropoda
`--o Trilobita
   |?-Agnostida
   |?-Eodiscina
   `--+--o Redlichiida
      |  |--Olenellina
      |  `--Redlichiina
      |--Corynexochida
      |--Phacopida
      |--Lichida
      |--Odontopleurida
      `--o Librostoma
         |--Proetida
         |--Harpetida
         |--Ptychopariida
         `--Asaphida

(1) Several alternative taxonomies are found in past and current literature. For example, trilobites are sometimes found placed in Arthropoda Subphylum Schizoramia within Superclass Arachnomorpha.
(2) Some authors argue that a new Order Odontopleurida should be separated (erected) from Order Lichida, and it appears such a revision will be eventually sustained.