BIO

Cuticle molted

Ecdysozoa

1

1

3

Annelida includes pogonophorans, echiurans, and sipunculans

2 Arthropoda includes pentastomids

3 Chaetognatha is discussed with deuterostomes

Blastula stage occurs in development

Diploblasts

Triploblastic Bilateria

Spiral cleavage

Radial cleavage

Mouth formed from blastopore

C h

o rd

ata

H e

m ich

o rd

ata

E ch

in o

d e

rm ata

C h

ae to

g n

ath a

A n

n e

lid a

M o

llu sca

P h

o ro

n id

a

B rach

io p

o d

a

E cto

p ro

cta

E n

to p

ro cta

G astro

trich a

C yclio

p h

o ra

A can

th o

ce p

h ala

R o

tife ra

M icro

g n

ath o

zo a

G n

ath o

sto m

u lid

a

N e

m e

rte a

P latyh

e lm

in th

e s

M e

so zo

a

X e

n aco

e lo

m o

rp h

a

C te

n o

p h

o ra

C n

id aria

P laco

zo a

P o

rife ra

C h

o an

o flag

e llate

s

DeuterostomiaProtostomia

Bilateria (Nephrozoa)

Lophotrochozoa

Animalia

Lo ricife

ra

P riap

u lid

a

K in

o rh

yn ch

a

N e

m ato

m o

rp h

a

N e

m ato

d a

A rth

ro p

o d

a

Tard ig

rad a

O n

ych o

p h

o ra

2