Figure 2.02

The Four Basic Chordate Characteristics

Invertebrates

Vertebrates

Protochordates

Chordates

Figure 2.07

Enteropneusta: acorn worms

Hemichordata

Pterobranchia: pterobranchs

Hemichordata

Figure 2.07

Figure 2.16

Urochordata: Ascidians (sea squirts)

Figure 2.16

Figure 2.16

Figure 2.16

Urochordata: Larvaceans

Figure 2.07

Cephalochordata: Amphioxus

Fig. 31.07(TE Art)

Chordata

Arthropoda

Annelida

Segmentation (Metamerism)

Epibranchial groove

Endostyle