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Ephippia (singular: ephippium) are winter or dry-season eggs of the various species of small crustacean in the order
Ephippia (singular: ephippium) are winter or dry-season eggs of the various species of small crustacean in the order Cladocera
The Diplostraca or Cladocera, commonly known as water fleas, is a superorder (biology), superorder of small, mostly freshwater crustaceans, most of which feed on microscopic chunks of organic matter, though some forms are predatory.
Over 1000 sp ...
(within the Branchiopoda
Branchiopoda, from Ancient Greek βράγχια (''bránkhia''), meaning "gill", and πούς (''poús''), meaning "foot", is a class (biology), class of crustaceans. It comprises Anostraca, fairy shrimp, clam shrimp, Diplostraca (or Cladocera), ...
); they are provided with an extra shell layer, which preserves and protects the resting stages inside from harsh environmental conditions until the more favorable times, such as spring, when the reproductive cycle is able to take place once again. Ephippia are part of the back of a mother carrying them until they are fully developed. After molting, the ephippium stays in the water, or in the soil of dried puddles, small ponds, and vernal pools. The resting stages are often called eggs, but are in fact embryos with arrested development. Ephippia can rest for many years before the embryo resumes development upon an appropriate hatching stimulus.
See also
* '' Bythotrephes longimanus'' (invasive species) * '' Cercopagis pengoi'' (invasive species) * ''Daphnia
''Daphnia'' is a genus of small planktonic crustaceans, in length. ''Daphnia'' are members of the Order (biology), order Anomopoda, and are one of the several small aquatic crustaceans commonly called water fleas because their Saltation (gait), ...
''
** '' Daphnia longispina''
** '' Daphnia lumholtzi'' (invasive species)
** '' Daphnia magna'' (large species)
** ''Daphnia pulex
''Daphnia pulex'' is the most common species of water flea. It has a cosmopolitan distribution: the species is found throughout the Americas, Europe, and Australia. It is a model species, and was the first crustacean to have its genome sequenced. ...
'' (small, most common)
* ''Moina
''Moina'' is a genus of crustaceans within the family Moinidae. The genus was first described by William Baird (physician), W. Baird in 1850. They are referred to as water fleas, but are related to the much larger ''Daphnia magna'' and the large ...
'' (smallest)
References
Further reading
* * * *External links
Branchiopoda Fishkeeping Freshwater crustaceans {{Branchiopoda