O'Sullivan, D., 1984. Description of Rathkea lizzioides sp. nov. (Hydromedusae: Rathkeidae) from Antarctica and a key to the genus. J. nat. Hist. 18 6: 861-868.

25919

10.1080/00222938400770751 [view]

O'sullivan, D.

1984

18(6): 861-868

Publication

A hydromedusa from the Antarctic, R. lizzioides sp. nov. is described and illustrated. The species is characterizedby its rounded bell-shaped form, being almost as broad as high, the presence of an apical dome and a gastric peduncle, the 4 unbranched oral arms, the number of nematocyst clusters (7-18in specimens 1.5 mm or greater in height), the occasional presence of 1 or more nematocyst clusters near the mouth margin, the 5-7 tentacles in each perradial tentacular bulb, the 3-5 tentacles in each interradial tentacular bulb, and the ovoid shape of the tentacular bulb. A key to the known species of Rathkea is provided.figs. 1-2, tabs. 1-2.Descriptor: Rathkea lizzoides

Antartida
Nematocysts
Systematics, Taxonomy

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