De Weerdt (1986) for unexplained reasons cites 1835, later 1836 as years of publication of this genus. This was ... [details]
Incertae sedis. De Weerdt (1986) suggests it could be an Axinella. [details]
Holotype: BMNH 1910.1.1.173
Type locality: Guernsey [details]
Syntype-series at ZMUC, seven specimens of Gellius primitivus [details]
Holotype: ZMA POR. 5000, NE of Yerseke, Oosterschelde, the Netherlands, LLWS, 0 m, on oysterbeds, 6-XI-1982, coll. ... [details]