Thorectinae Bergquist, 1978, 1888

Ekins, Merrick, Erpenbeck, Dirk, Debitus, Cécile, Petek, Sylvain, Mai, Tepoerau, Wörheide, Gert & Hooper, John N. A., 2023, Revision of the genus Fascaplysinopsis, the type species Fascaplysinopsis reticulata (Hentschel, 1912) (Porifera, Dictyoceratida, Thorectidae) and descriptions of two new genera and seven new species, Zootaxa 5346 (3), pp. 201-241 : 207

Subfamily Thorectinae Bergquist, 1978

Definition. Amended From Cook & Bergquist (2002): Variable growth form. Fibre skeleton comprises primary, secondary fibres and tertiary, except for Luffariella and Fenestraspongia , which also have quaternary fibres. These are massive, often lobose, globose or digitate sponges, not lamellate or folio-digitate (except for Collospongia which is a spreading plate).

Diagnosis. Amended From Cook & Bergquist (2002): Variable growth form, from low and pad-like to a range of upright forms. The fibre skeleton comprises primary, secondary and sometimes tertiary elements. Fibres are distinctly concentrically laminated. Primary fibres, where apparent, are cored with foreign material and may form fascicles. Secondary and tertiary fibres are uncored, except in the genera Hyrtios , Skolosachlys gen. nov. and Rubrafasciculus gen. nov. which have coring of the primary and secondary fibres. There is a low to high collagen deposition in the mesohyl and this can be characteristic for each genus.