Hajdu, van Soest and Hooper, 1994
Definition: Poecilosclerida with terminally microspined ectosomal megascleres and up to 5 categories of structural megascleres, most frequently monactinal. Microscleres are palmate chelae, diverse toxas, but sigmas never present.
Remarks: Four families are distinguished: Microcionidae, Iophonidae, Raspailiidae and Rhabderemiidae. The basal skeletal pattern is plumoreticulate although in thinly encrusting forms it is usually a hymedesmoid skeleton or a microcionid skeleton .
Source: Hooper's Internet Sponge Guide.
Families represented in the area:
Family Microcionidae: ectosomal subtylostyles; microscleres palmate isochelae and toxas.
Family Iophonidae: ectosomal tylotes; microscleres palmate isochelae or anisochelae, and toxas (may be absent).
Family Raspailiidae: ectosomal anisoxeas; microscleres absent.
Family Rhabderemiidae: ectosomal microstyles; choanosomal rhabdostyles; microscleres spirosigmas, occasionally accompanied by thraustoxeas and thraustosigmas.