Animal Phylogeny II

Eumetazoa

Bilateria

Protostomia

Ecdysozoa

Phylum Arthropoda

jointed exoskeleton, extrinsic musculature

2 pairs of antennae

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Eumetazoa

Bilateria

Protostomia

Ecdysozoa

Phylum Arthropoda

jointed exoskeleton, extrinsic musculature

no antennae

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Eumetazoa

Bilateria

Protostomia

Ecdysozoa

Phylum Arthropoda

jointed exoskeleton, extrinsic musculature

1 pair of antennae antennae

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Eumetazoa

Bilateria

Deuterostomia

secondary pentaradial symmetry
water vascular system

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Eumetazoa

Bilateria

Deuterostomia

Phylum Chordata

dorsal, hollow nerve chord, notochord,
pharyngeal arches, post-anal tail

Subphylum Urochordata

Tunicate

Sessile adult.

Eumetazoa

Bilateria

Deuterostomia

Phylum Chordata

Subphylum Urochordata

Tunicate

Tadpole larva.

Eumetazoa

Bilateria

Deuterostomia

Phylum Chordata

Subphylum Cephalochordata

Branchiostoma (Amphioxus) sp.

Juvenile.

Eumetazoa

Bilateria

Deuterostomia

Phylum Chordata

Subphylum Cephalochordata

Branchiostoma (Amphioxus) sp.

Adult.

Eumetazoa

Bilateria

Deuterostomia

Phylum Chordata

Deuterostomes

chordates with vertebrae

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