Describe Agnostida…
- 2-3 segments
- No spines
- No eyes
- Tiny!
In what times did the trilobites live?
Lower Cambrian to Upper Permian
Which order of trilobite is fairly spiny and has 22 thoracic segments?
Redlichiida
Describe Ptychoperiida…
- 6 segments
* Massive genial spines
Which trilobite has 12-13 segments and small eyes?
Phacopida
Which trilobite has 11 segments and a flat glabella?
Phacopina
Describe the trilobite order Odontopleurida…
Insanely spiny!
Name 5 parts of the trilobite anatomy
- Facial suture
- Cephalon
- Glabella
- Pygidium
- Thorax
When did Agnostida live?
Lower Cambrian-Upper Ordovician
When did Redlichiida live?
Lower Cambrian-Mid Cambrian
When did Ptychoperiida live?
Lower Cambrian-Upper Devonian
When did Phacopida live?
Lower Ordovician-Mid Devonian
When did Phacopina live?
Lower Ordovician-Upper Devonian
When did Odontopleurida live?
Upper Cambrian-Mid Devonian