Lab quiz 3

Question 1

What are the 2 orders of Graptolites and how do they differ? (mode of life, morphologically, stratigraphic ranges)

Answer 1

Dendroidea: Sessile, 2 types of theca, supported by disspiments, mid-cambrian - mid-carboniferous
Graptoloidea: Planktonic, 1-8 stipes, 1 theca, Ordovician - Devonian

Question 2

Describe dendroidea (mode of life, morphologically, stratigraphic ranges)

Answer 2

sessile, supported by disspiments, 2 types of theca (autothecae, bitheca), mid-Crambrian - mid-carboniferous

Question 3

Describe Graptolida (mode of life, morphologically, stratigraphic ranges)

Answer 3

Planktonic, 1-8 stipes, 1 theca, Ordovician - Devonian