Sibogita Maas, 1905 New

Zhenzu Xu, Jiaqi Huang, Mao Lin, Donghui Guo & Chunguang Wang, 2016, Taxonomic notes on Hydroidomedusae (Cnidaria) from South China Sea II: Family Bythotiaridae (Anthomedusae), Zoological Systematics 41 (2), pp. 149-157 : 155

Sibogita Maas, 1905 New record to China

Sibogita n. g. Maas, 1905: 17; Kramp, 1961: 124; Bouillon et al., 2006: 180; Schuchert, 2009: 454. Type species: Sibogita geometrica Maas, 1905 .

Diagnosis. Medusa with 4 primary radial canals, branching repeatedly at various levels; no centripetal canals; with or without secondary tentacles and warts; gonads with 8 rows of transversely folded; no ocelli. Polyp unknown.

Remarks. The genus is a currently monotypic genus. Bigelow (1919) assumed that the side branches of the radial canals were actually centripetal canals. He therefore synonymized that the genus with Calycopsis . Kramp (1959) outlined the taxonomic history of the genus and contested Bigelow’s view of the growth direction of the radial canals. Kramp thinks that the branching radial canals arise indeed through branching during ontogeny and he thus has an argument to maintain the genus. The diminution of the canal width towards the periphery is a good evidence to support this view. Schuchert (2009) assumed that neither known the polyp stage of Calycopsis nor of Sibogita , further discussions on the validity of Sibogita are premature.

This genus is recorded from Chinese waters for the first time.