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Dissection of a crayfish: opened stomach

Legend:

1  stomach
2 sclerite
3  lateral tooth
4  median tooth
5  intestine
6  filters
7  hindgut

English name: Crayfish
Scientific name: Astacus sp.
Familia: Astacidae
Classis: Malacostraca
Phylum: Arthropoda (subphyllum Crustacea)
Regnum: Animalia