Lizzia Forbes, 1846

Wang, Chunguang, Xu, Zhenzu, Huang, Jiaqi, Guo, Donghui, Lin, Mao & Xia, Zhen, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea III: Family Rathkeidae and Zancleopsidae, Zoological Systematics 41 (4), pp. 392-403 : 394

Genus Lizzia Forbes, 1846

Lizzia Forbes, 1846: 286 ; Kramp, 1961: 87; Bouillon & Boero, 2000: 83; Bouillon et al., 2006: 134; Schuchert, 2007: 288; Xu et al., 2014: 229.

Type species: Lizzia blondina Forbes, 1848 .

Diagnosis. Medusa with four or eight simple, unbranched perradial oral tentacles inserting at level of mouth rim; manubrial peduncle present; eight or exceptionally 16 marginal bulbs, each with one or more simple tentacles, usually with more tentacles on the perradial than the interradial bulbs; interradial medusa buds develop on manubrium; gonads encircling manubrium.

Remarks. Members of the genus are easily distinguished from all other genera by their unbranched perradial oral tentacles inserting at level of mouth rim and eight marginal bulbs. The genus comprises following species: Lizzia blondina Forbes, 1848 , L. elisabethae Haeckel, 1879 , L. ferrarii Segura, 1980 , L. gracilis ( Mayer, 1900) and L. octostyla ( Haeckel, 1879) ( Bouillon et al., 2006; Schuchert, 2007; Xu et al., 2014), of which only three species are known in China Sea.

Key to Lizzia species recorded in China Seas.

1. Eight oral tentacles...............................................................................................................................................................................2 Four solitary oral tentacles; marginal bulbs without ocelli, four interradial bulbs each with only one tentacle, four perradial bulbs each with one to three tentacles..................................................................................................................... L. blondina Forbes, 1848

2. Eight oral tentacles in four perradial pairs ............................................................................................... L. octostyla ( Haeckel, 1879) Eight oral tentacles in four perradial and four interradial position ................................................................ L. gracilis ( Mayer, 1900)