Gonionemus Vertens

Gonionemus Vertens

 

an invertebrate animal of class Hydrozoa, phylum Coelenterata. The umbrella of the medusa is transparent and yellowish-green with a diameter of 15–18 mm (sometimes to 25 mm). Along the edge of the umbrella there are approximately 80 tentacles with stinging cells, whose poisonous products cause a severe burn in man; fatal cases have been known. G. vertens is found in the Sea of Japan and off the shores of the Kuril Islands, usually inhabiting the shoals in thickets of eelgrass.

References in periodicals archive ?
First record of the invasive stinging medusa Gonionemus vertens in the southern hemisphere (Mar del Plata, Argentina)
In this paper we present the finding of another invasive hydromedusa, Gonionemus vertens Agassiz, 1862 (Hydrozoa, Limnomedusae), found for the first time in the southern hemisphere.
These characteristics agree with previous descriptions of the species Gonionemus vertens Agassiz, 1862 (Arai & Brinckmann-Voss, 1980; Russell, 1953) (Fig.
Gonionemus vertens is distributed in very shallow temperate waters of the northern hemisphere (Pacific, Atlantic and Mediterranean), but it is absent from arctic and tropical zones (Edwards, 1976; Arai & Brinckmann-Voss, 1980).
Poisoning by the medusa Gonionemus vertens in the Sea of Japan.
Rather, we interpret them as functionally analogous to the fibrous collar described by West-fall (1970) in the neck region of operculate nematocysts in the hydromedusan Gonionemus vertens.
The nematocyte complex in a hydromedusan, Gonionemus vertens.