Annelids (Chapter 13)

Question 1

Annelids

Answer 1

worms - earthworms, leaches
poor fossil record - mainly ichnofossils (burrows & tubes)
Paleozoic - Cenozoic
terrestrial, marine & freshwater
essential group with variety
phyletic relationship with mollusks & arthropods - protosomes

Question 2

Annelids (body structures)

Answer 2

mainly soft-bodied (some do secrete shell)
segmented
complex phosphatic jaw structure - scolecodonts/radula (microfossils - disarticulate into microscopic pieces)