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Kingdom Animalia

Invertebrates:Chapters 32 & 33

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In these chapters

What is an animal?

How best to organize animal groups

Evolutionary milestones in animal evolutionaryhistory

Different phylaDefining characteristicsNotable representatives

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Animalia

Multi-cellular

Heterotrophic digest food in an internalchamber

Lack a rigid cell wall

Most have differentiated tissues

Motile at at least one stage of life cycle

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Lets organize these animals!!" #$%%&'($

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Lets organize these animals!

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Embryonic development

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Classifying

! Molecular data hasdrastically revised the

phylogeny of Animalia!

! The debate

continues

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Animalia Invertebrate PhylaB1(,9&(7 J 7(,7 J L#''-#* B +$-#,A*

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Sponges

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Sponges

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Sponge movie 15

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CnidariansM&A-&' *9..#)$9

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Cnidocyte

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Cnidaria Two formsPolyp

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Medusa (only some)

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CnidariansHydrozoa Portuguese Man O War Hydra

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Man o War movie 21

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Cnidarians Jellies (Jellyfish)

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Movie 23

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Comb Jellies

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Comb jellies Show movie

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Animal Phyla# No symmetry

Sponges

# Radial symmetry Jellyfish & Comb jellies

# Bilateral symmetry# Protostomes

FlatwormsSegmented wormsMollusksRotifers

# Bilateral symmetry, cont.# Protostomes, cont.

(Sheds its outer layer)TardigradesRoundworms

Insects & friends

# Deuterostomes EchinodermsChordates

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Platyhelminthes FlatwormsG$#A&)($9 ($=&$&*-;?

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Planaria! 29

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Annelids Segmented worms

Earthworms, leeches

Bristles for locomotion

SystemsDigestiveCirculatory

Many heartsNephrons

NervousMuscle layers 30

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Xmas tree worm movie

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MollusksV"-)(,*7 Z&*)$(=(A*7[-K&'K#*7 V#="&'(=(A*

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Chitons

G$-.-;K# .(''/*S*

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Gastropods

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Show slug movie

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Elysia movie

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Bivalves

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CephalopodsC1#&AR+(()F

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Cuttlefish

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Cuttlefish movie

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Octopus & Squid

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Octopus

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RotifersTiny

2200 sp.

Mostly freshwater

Prey on bacteria

Coelomates

Many purely female species

SystemsDigestiveProtonephridiaNervous

Ganglion (tiny brain)Proto-eyes

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Rotifer Feeding 44

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Animal Phyla# No symmetry

Sponges

# Radial symmetry Jellyfish & Comb jellies

# Bilateral symmetry# Protostomes

FlatwormsSegmented wormsMollusksRotifers

# Bilateral symmetry, cont.# Protostomes, cont.

(Sheds its outer layer)TardigradesRoundworms

Insects & friends

# Deuterostomes Echinoderms

Chordates

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Phylum Tardigrada

Water bears, mosspiglets

Himalayas to deep sea;poles to equator

On lichens, mosses,feed on plant tissues

From -328 to 304degrees, from vacuumof space and back

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Tardigrade movie

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Nematodes Roundworms!-,97 /8-`/-)(/*

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Lymphatic philarisis

Worms infect lymphatictissue, blocking flow oflymph

Accumulation of fluidin lower extremitiescauses extreme edema

Babies travel through

blood streamTransmitted bymosquitoes

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Nematode movie 50

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Phylum Arthropoda

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Horseshoe Crabs

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ArachnidsPOO7OOO *=0

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Show spider movie 1 & 2

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Myriapods

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Crustaceans

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Hexapods (insects & friends)

Three pairs of legs

Three body segments:

head, thorax, abdomen

Two pair wings

800,000 named species

Incredibly diverse forms& life histories

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Some insect orders

DragonfliesPredators

Beetles350,000 sp.

Ants, bees, wasps

Complex socialorganization

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Bee movie 60

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G$()(*)(.#*I'' \,K#$)#8$&)#*7g&'.(*)h

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EchinodermsC

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Echinoderms

Sea stars, sea urchins,sea cucumbers, sanddollars & friends

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Echinoderm movie

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Documents

Animalia Ch32 33