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Notostraca
| Notostraca | |
|---|---|
| |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Subphylum: | |
| Class: | |
| Order: | Notostraca
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| Family: | Triopsidae
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| Genera | |
The order Notostraca has just two living genera in it. Triops and Lepidura.[1][2] The two genera are considered 'living fossils', as they have not changed in outward form since the Triassic.
Notostracans, or tadpole shrimps, are omnivores living on the bottom of temporary pools and shallow lakes. They live in pools of water on every continent except Antarctica. They grow very quickly, and can reach adulthood in a week. Triops only live for a short time; a record-breaking female only lived to be 100 days. When their pools dry up,adult tadpole shrimp die. Their eggs, however, stop developing for a time. When they are in water again, they come to life, and new Triops are hatched. This is because of a state known as diapause, where eggs can lie dormant for up to twenty years before hatching again.
- ↑ Denton Belk (2007). "Branchiopoda". In Sol Felty Light & James T. Carlton (ed.). The Light and Smith Manual: Intertidal Invertebrates from Central California to Oregon (4th ed.). University of California Press. pp. 414–417. ISBN 9780520239395.
- ↑ J. K. Lowry (October 2, 1999). "Notostraca (Branchiopoda)". Crustacea, the Higher Taxa: Description, Identification, and Information Retrieval. Archived from the original on July 23, 2011. Retrieved February 7, 2011.
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