FIGURE 7 in A new species of lithistid sponge hiding within the Isabella mirabilis species complex (Porifera: Demospongiae: Tetractinellida) from seamounts of the Norfolk Ridge

FIGURE 7. Outer surface and desma skeleton of the holotype MNHN DCL 4111 (QM G318737) of Isabella tanoa n. sp. A, outer surface showing bundles of oxeas protruding through the surface, with abundant centrotylote microacanthoxeas and ectosomal dichotriaenes. B, minute oscules surrounded by ectosomal streptasters and microxeas. C, loose open architecture of the dicranoclone desmas in the upper choanosome. D, increased thickness of the desmas and increased complexity of the articulation between the desmas deeper in the choanosome. E and F, details of articulation between choanosomal desmas.