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2.2.5. Sub-class 5. Copepoda
Unit 2 - Sub-phylum Crustacea
2.2.5. Sub-class 5. Copepoda
1. Fresh water or marine; free-swimming commensal or parasitic.
2. Body small, elongated, composed of a head, thorax and abdomen.
3. Carapace reduced or absent.
4. Lateral compound eyes absent: a single median eye present.
5. Antennuels and antennae well developed; used for swimming; mandibles may have palps.
6. Typical five pair of thoracic appendages of which first uniramous, the rest biramous. Sometimes a 6 th pair
uniramous, vestigial appendages present.
7. Abdomen without appendages ends in a pair of caudal styles.
8. Excretion by maxillary gland.
9. Larva is a nauplius.
This sub-class includes 8 orders
Eg. Cyclops (water flea), Ergasilus, Condracanthus, Caligus, Calanus, Monstrilla
Last modified: Tuesday, 2 August 2011, 10:34 AM