Travel Reference
In-Depth Information
Pharynx
Gill slits
? Notochord
(Dorsal fin)
? Intestine
Myotome
Figure 19
Cathaymyrus
, our earliest known hemichordate ancestor, from early Cambrian
rocks. These little animals, which lived in groups in soft mud, had exactly the same lifestyle as
present-day lancelets, simple creatures with the scientifi c name of
Amphioxus
.
Courtesy of Professor Degan Shu.
