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Cross section through the gonads of a lancelet
Legend:
1 dorsal fin
2 neural tube
3 notochord
4 myomere
5 myoseptum
6 epistyle
7 branch of dorsal aorta
8 gill plates
9 pharynx
10 liver
11 gonad (ovary)
12 endostyle
English name: Lancelet
Scientific name: Branchiostoma lanceolatum
Familia: Branchiostomidae
Classis: Cephalochordata
Phylum: Chordata (primitive)
Regnum: Animalia
