Ephyra


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ephyra

[′e·fə·rə]
(invertebrate zoology)
A larval, free-swimming medusoid stage of scyphozoans; arises from the scyphistoma by transverse fission. Also known as ephyrula.

Ephyra

 

the larva of most coelenterates of the class Scyphozoa. The larvae are formed asexually by means of transverse fission of the polyploid generation—the scyphistoma. The edge of the umbrella forms eight double lobes. Tentacles and oral lobes are absent. The digestive system is rudimentary: in addition to the stomach, there are only two rudiments of radial canals. The youngest ephyrae are transparent and reach several mm in diameter. Transformation into an adult jellyfish is accompanied by rapid growth. The edge of the umbrella becomes more regular, and a complex gastrovascular system, lateral tentacles, and the rudiments of sex glands develop.

References in periodicals archive ?
45 Musselburgh According to Greek mythology, Sisyphus was the first king of Ephyra - now known as Corinth - who was punished for chronic deceitfulness by being compelled to roll an immense boulder up a hill, only to see it roll back down, repeating this action forever.
The king of Ephyra was given a punishment wherein he had to roll a huge boulder up a steep hill, watch it roll back down and repeat this desperate action for all eternity.
These included platyhelminthes, brachiopods, two cyclopoid copepods, nematodes, and a single ephyra of Aurelia spp.
For this period, furthermore, the database could be extended to include the material from excavated sites throughout Epirus, including the important settlements of Ephyra (Xylokastro) and Dodona, a number of burials (including those with swords of Aegean type) and bronze hoards.