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.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.
References in periodicals archive ?
lactea ephyrae suggests that this species may complete its life cycle in Argentina, off southern Buenos Aires Province.
Ephyrae, juveniles, and adults have been observed along their distributional range (Mianzan, 1986, 1989a, 1989b; Mianzan et al., 1988; Faillia-Siquier, 2006; Dutto et al., 2017).
Nineteen Aurelia ephyrae were used, eight each for the two primary antibodies and three for double stains.
At first glance, the two networks appear to be associated with nematocytes, which are scattered in Aurelia ephyrae but form clusters in adults.
Survivorship and production of Aurelia aurita ephyrae in the innermost part of Tokyo Bay, Japan.
Individuals of Aurelia aurita (Linnaeus 1758) ranging in size from newly budded ephyrae (0.25 cm) to fully mature medusae (10.0 cm) were obtained from cultures of strobilating polyps maintained by the New England Aquarium in Boston, Massachusetts.
These higher speed recordings were of shorter duration, and the ephyrae remained in the recording vessels for no longer than 5 min.
(1998) demonstrated that ephyrae spend the bulk of their natural existence actively swimming, and Sullivan et al.
Because of their smaller sizes and lower swimming velocities, ephyrae experience dramatically different fluid environments compared to adults of the same scyphomedusan species.
Smaller stages of these medusivores can be fed Aurelia ephyrae, finely diced adult medusae, or small hydromedusae.
Ranging from monodisk to polydisk with more than 20 developing ephyrae. Color varying with locality: cinnamon in southern California, buff in Monterey.
Ephyrae were budded from scyphistomae at 20 [per thousands] in the laboratory.