Trilobites Flashcards Preview

Palaeontology > Trilobites > Flashcards

Flashcards in Trilobites Deck (14)
Loading flashcards...
0
Q

Describe Agnostida…

A
  • 2-3 segments
  • No spines
  • No eyes
  • Tiny!
1
Q

In what times did the trilobites live?

A

Lower Cambrian to Upper Permian

2
Q

Which order of trilobite is fairly spiny and has 22 thoracic segments?

A

Redlichiida

3
Q

Describe Ptychoperiida…

A
  • 6 segments

* Massive genial spines

4
Q

Which trilobite has 12-13 segments and small eyes?

A

Phacopida

5
Q

Which trilobite has 11 segments and a flat glabella?

A

Phacopina

6
Q

Describe the trilobite order Odontopleurida…

A

Insanely spiny!

7
Q

Name 5 parts of the trilobite anatomy

A
  • Facial suture
  • Cephalon
  • Glabella
  • Pygidium
  • Thorax
8
Q

When did Agnostida live?

A

Lower Cambrian-Upper Ordovician

9
Q

When did Redlichiida live?

A

Lower Cambrian-Mid Cambrian

10
Q

When did Ptychoperiida live?

A

Lower Cambrian-Upper Devonian

11
Q

When did Phacopida live?

A

Lower Ordovician-Mid Devonian

12
Q

When did Phacopina live?

A

Lower Ordovician-Upper Devonian

13
Q

When did Odontopleurida live?

A

Upper Cambrian-Mid Devonian