Phylum annelida

Question 1

Annelida General Traits:

Answer 1

-Spiral Cleavage, protostome development
-Closed Circulatory System
-Respiratory across skin

Question 2

Annelida Body Segmentation:

Answer 2

Metamerism, repetition of segments through body

Question 3

Claude Errantia (Polychaeta):

Answer 3

-Parapodia, setae, prostomium, eyespots
-Setae arranged in bundles on parapodia
-Pinchers-like jaw
-Prostomium looks like it’s head

Question 4

Clade Clitellata:

Answer 4

-Gut, typhlosole, cuticle, circular muscles, and longitudinal muscles
-Very few setae or absent
-Gas exchange across skin
-Examples- earthworms, leeches
-Clitellum in middle part of body

Question 5

Clade Hirudinea (leeches)

Answer 5

Leeches have posterior suckers and lack multiple setae, clitellum is not as prominent compared to earthworms (clitellata)