Haliclona (Gellius), (Gray, 1867) (Gray, 1867)

Vicente, Jan, Rutkowski, Emily, Lavrov, Dennis V., Martineau, Gabrielle, Timmers, Molly & Toonen, Robert J., 2025, Integrative taxonomy of introduced Haplosclerida and four new species from Hawaiʻi, Zootaxa 5566 (2), pp. 243-272 : 247

Subgenus Gellius

Definition. Chalinidae with a choanosomal skeleton consisting of a rather confused, subhalichondroid reticulation of pauci- to multispicular primary lines, irregularly connected by unispicular secondary lines. Ectosomal skeleton, if present, either a regular, tangential, unispicular, isotropic reticulation, or consisting of irregularly strewn, tangentially orientated spicules. Microscleres if present, sigmas and toxas (modified from de Weerdt 2002).

Remarks. The definition of Gellius from de Weerdt (2002) does not include presence of microscleres but it was published as a “key to subgenera of Haliclona ” by de Weerdt (2002). As such, the statement “microscleres if present, sigmas and toxas” have been added to the original definition.