Living reference work entry
Greek: archi = very old.
Archigetes species (Fig. 1) belong to the monozoic tapeworm order Caryophyllidea. Adults (0.5–3 cm long) are described worldwide. They live as intestinal parasites in fresh water fishes, but larvae are found in tubificid worms. Their body lacks internal or external segmentation and includes just one set of female and male sexual organs unlike all other Eucestoda. Worldwide about 41 genera of the Caryophyllidea are described with a total of around 150 families.
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