Animal Diversity Lecture 3

Bryozoans

Ectoprocta

Lamp Shells

Brachiopoda

Platyhelminthes, Ectoprocta, Brachiopoda, Nemertea, Annelida, Mollusca

Lophotrochozoa

Aceolomate tissue layers

endoderm, mesoderm, ectoderm

Coelomate Body Plan

contain a ceolom

Coelom

Body Cavity

Inside Mesoderm Layer

Coelom

How ectoprocta and brachiopoda collect food

Lophophore

Mostly marine, some freshwater, colonies can contain millions of zooids

Ectoprocta

Also known as Moss Animals

Ectoprocta

Ciliated lophophore feeding structure

Ectoprocta

distinct alimentary canal

Ectoprocta

Muscles for retracting lophophore

Ectoprocta

Marine species secrete calcite

Ectoprocta

Has two shells on the upper end

Brachiopoda

marine “worm” with dorsal and ventral shell

Brachiopoda

What are the shells on top of a stalk in a brachiopod called?

pedicle

Sessile and Benthic

Brachiopoda

How many extant species of Brachiopoda

~335

How many fossil species of Brachiopoda

>30,000

Why did Brachiopoda population decrease so much?

Permian-Triassic Extinction

Have a trocophore

Nemertea, Annelida, Mollusca

Ribbon Worms

Nemertea

Segmented Worms

Annelida

Snails, Clams, Squid, Octupus

Mollusca

Proboscis Worms or Ribbon worms

Nemertea

Unsegmented Worms

Nemertea

Mostly marine, few freshwater, and a few terrestrial

Nemertea

Free-living and most are predatory

Nemertea

Sensory Papillae in Nemertea

Can grab things for eating

Size Range 5mm to 30 meters

Nemertea

Annelida

Segmented Worms

Terrestrial, freshwater and marine

Annelida

1 mm to 3 meters, asexual and sexual reproduction

Annelida

Hair-like structure

Cetae

Walls

Septum

Classes of Annelida

oligochaeta, polychaeta, hirudinea

Earthworms and relatives

Oligochaeta

Polychaets

Polychaeta

Leeches

Hirudinea

Annelida Class

Lophotrochozoa

Mostly terrestrial, also freshwater and marine

Oligochaeta

Earthworms alter

soil properties

Primarily marine, a few terrestrial

Polychaeta

Incredibly diverse

Polychaeta

Polychaeta cetae

Parapodia

deep sea ecosystem that forms around a whale carcass

Whale fall communities

Terrestrial and freshwater

Hirudinea

Some predatory and others are Haemophagic

Hirudinea

Feeding on blood

Haemophagic

Medicinal uses

Hirudinea

Anticoagulant peptide

Hirudin