1

BIO2135 – Animal Form and Function

Bryozoa (Ectoprocta)Miller and Harley Chap. 10

BIO2135 – Animal Form and Function

Lophotrochozoa PhylogenyFlat bodies

Platyzoa

Lophozoa

Trochozoa

BIO2135 – Animal Form and Function

Tripartite CoelomLophophore(Mesocoel)

Epistome(Protocoel)

Body Cavity(Metacoel)

2

BIO2135 – Animal Form and Function

Lophophore

Fig. 10.2

BIO2135 – Animal Form and Function

Bryozoan Filter-Feeding

BIO2135 – Animal Form and Function

Complete Digestive Tract

Mouth

Pharynx

Pyloric Stomach

Caecum

Cardiac Stomach

Rectum

Anus

3

BIO2135 – Animal Form and Function

Bryozoan Terminology

• Polypide: lophophoreand visceral mass• Cystide: exoskeleton

(Zoecium) and the tissue that secretes it (epidermis) • Zoarium: colony

BIO2135 – Animal Form and Function

Marine Bryozoa

Fig. 10.27

BIO2135 – Animal Form and Function

Freshwater Bryozoa

4

BIO2135 – Animal Form and Function

Bugula colony

Lophophore

Mouth

Zoecium

Budding Polypide

Avicularia

Ovicell

BIO2135 – Animal Form and Function

Avicularia

PedicelMandible

Vestigial polypide

Beak

Abductor muscle

Adductor muscle

BIO2135 – Animal Form and Function

Ecology

•Filter-feeders•Form crusts

and reefs•Colonize rock,

algae, boat hulls

5

BIO2135 – Animal Form and Function

Bryozoa

BIO2135 – Animal Form and Function

Next Class - Mollusca● Miller and Harley Chap. 11