Difference between Oligochaetes and Polychaetes
Difference between Oligochaetes and Polychaetes are in tabular form below –
No. |
Oligochaetes |
Polychaetes |
Definition |
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1. | The organisms that have few setae per body segment, with coelom divided by septa, with no head or Parapodia, and have tubular body is called as Oligochaetes. | The worms which are marine annelid, have paddle-like paired appendages, Parapodia bear bristles that are useful in swimming, and this is called polychaetes. |
Parapodia and Chaetes |
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2. | Organisms of Oligochaetes do not have parapodia and are with few chaetes. | Organisms of Polychaetes have parapodia and are with many chaetes. |
Habitats |
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3. | Oligochaetes are mainly live in aquatic habitat and terrestrial habitat. | Polychaetes are typically live in marine habitat. |
Included worms |
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4. | Earthworms are included in the organisms of Oligochaetes. | Bristle worms are included in the organisms of Polychaetes. |
Sperm Transfer |
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5. | The process of external sperm transfer is absent in the Oligochaetes. | The process of external sperm transfer is present in the Polychaetes. |
Gonads |
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6. | The organisms have permanent gonads. | The organisms have temporary gonads. |