Eucodoniidae Schuchert, 1996

Mao Lin, Zhenzu Xu, Jiaqi Huang, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea I: Family Eucodoniidae (Anthomedusae), Zoological Systematics 41 (1), pp. 48-53 : 49

Family Eucodoniidae Schuchert, 1996

Eucodoniidae Schuchert, 1996: 88 –89; Bouillon et al., 2006: 147.

Diagnosis (modified after Bouillon et al., 2006). Hydroid. unknown.

Medusae. Umbrella bell-shaped, without apical projection; no exumbrellar cnidocyst tracks; and manubrium quadrangular, on conical gastric peduncle; mouth quadrangular, with 4 inconspicuous cnidocyst-armed lips; medusae budding from stomach; with 4 radial canals and circular canal; gonads encircling manubrium; four or two solid perradial marginal tentacles with terminal swelling; four or two tentacular bulbs and other two opposite bulbs very rudimentary; no ocelli.

Discussion. Schuchert (1996) and Bouillon et al. (2006) provided a generic diagnosis for monotypic family Eucodoniidae based on Eucodonium brownei Hartlaub, 1907 with four tentacles and four marginal bulbs. Contrary to E. brownei , 3 new species of Eucodonium are reported in the present paper with only two tentacles, two marginal bulbs, and other two opposite rudimentary bulbs. Therefore, the diagnosis of the family was modified with respect to these characters.