1

BIO2135 – Animal Form and Function

Annelida● Miller and Harley Chap. 12

BIO2135 – Animal Form and Function

Annelida Phylogeny

Fig. 12.2

BIO2135 – Animal Form and Function

Lophotrochozoa PhylogenyFlat bodies

Platyzoa

Lophozoa

Trochozoa

2

BIO2135 – Animal Form and Function

Annelida Taxonomy

● Class Errantia– Marine with parapodia

● Class Sedentaria– Marine, freshwater,

terrestrial– Parapodes reduced or

absent– Setae for ancres

BIO2135 – Animal Form and Function

Metamerism

Fig. 12.3 & 23. 17

BIO2135 – Animal Form and Function

Class Errantia

3

BIO2135 – Animal Form and Function

Nereis Locomotion

BIO2135 – Animal Form and Function

NereisSwimming

BIO2135 – Animal Form and Function

Gas Exchange & Circulation

Fig. 12.6 & 26.1

4

BIO2135 – Animal Form and Function

Nervous System

Fig. 12.7 & 24.7

BIO2135 – Animal Form and Function

Excretion: Metanephridia

Fig. 12.8 & 28.11

BIO2135 – Animal Form and Function

Clades Errantia vs. Sedentaria

Fig. 12.24

5

BIO2135 – Animal Form and Function

Class Sedentaria

Fig. 12.12 & 12.13

BIO2135 – Animal Form and Function

Clitellida (Oligochaeta & Hirudinida)

Fig. 12.15

BIO2135 – Animal Form and Function

Peristaltic Locomotion

Fig. 12.16

6

BIO2135 – Animal Form and Function

Peristaltic Locomotion

BIO2135 – Animal Form and Function

Oligochaeta Anatomy

Fig. 12.17 & 12. 18

BIO2135 – Animal Form and Function

Feeding

7

BIO2135 – Animal Form and Function

Reproduction Fig. 12.9

BIO2135 – Animal Form and Function

Cocoon Formation

Fig. 29.3

BIO2135 – Animal Form and Function

Annelid Lifecycle

Fig. 12.9

8

BIO2135 – Animal Form and Function

Clade Hirudinidea

Fig. 12.20 & 12.21

BIO2135 – Animal Form and Function

Looping Movements

BIO2135 – Animal Form and Function

Medical Uses

9

BIO2135 – Animal Form and Function

Next Class - Nematoda● Miller and Harley Chap. 13