Thorectinae, Lendenfeld, 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 : 237

Key to the genera within Thorectinae (amended from Cook & Bergquist, 2002)

1. Sponge dermis armoured............................................................................... 2

- Sponge dermis unarmoured............................................................................. 8

2. Sponge dermis heavily armoured......................................................................... 3

- Sponge dermis armouring partial with a striated pattern...................................... Skolosachlys gen.nov.

- Sponge dermis armouring superficial..................................................................... 6

3. Skeleton regular...................................................................................... 4

- Skeleton irregular..................................................................................... 5

4. Primary fibres large diameter..................................................................... Thorecta

- Primary fibres similar to secondary fibres........................................................ Thorectandra

5. Primary fibres fasciculating.......................................................... Rubrafasciculus gen.nov.

- Primary fibres not fasciculating................................................................ .. Aplysinopsis

6. Primary fibres fasciculating............................................................................. 7

- Primary fibres not fasciculating............................................................. .. Petrosaspongia

7. Heavy collagenous matrix................................................................. Fascaplysinopsis

- Thin walled lamello-digitate or foliose sponges, fibres parallel to the surface............................ Collospongia

8. Quarternary fibers present.............................................................................. 9

- Quartenary fibres absent............................................................................... 10

9. Fenestrate surface, fasciculating primary fibres.................................................. Fenestraspongia

- Conulose surface, primary fibres mostly non-fasciculate............................................... Luffariella

10. Primary and secondary fibres uncored.................................................................... 11

- Primary and secondary fibres cored.......................................................................12

11. Axially concentrated skeleton................................................................... Thorectaxia

- Dense branching, non-hierarchical fibre network................................................ Dactylospongia

12. Secondary fibres cored............................................................................ Hyrtios

- Secondary fibres uncored.............................................................................. 13

13. Primary fibres strongly fasciculated throughout sponge............................................ Fasciospongia

- Primary fibres not strongly fasciculated throughout sponge................................................... 14

14. Upright growth form, on a basal stalk, smooth surface.................................................. Taonura

- Low growth forms................................................................................... 15

15. Secondary fibre skeleton well developed................................................................... 6

- Skeleton comprises primary and secondary fibres in equal portions 17

16. Honeycomb pattern at surface, colour darkens upon collection....................................... Smenospongia

- Without honeycomb pattern at surface, colour does not change........................................ Cacospongia

17 Heavy collagenous mesohyl, irregular skeleton................................................... Semitaspongia

- Low to moderate mesohyl collagen, regular skeleton.............................................. Scalarispongia