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Bergquist, 1978

Definition: These sponges lack mineral spicules, typically fleshy and soft, with pigment that oxidizes to purple colouration; skeleton consists of large, widely spaced spongin fibres forming dendritic or reticulate structures, and fibres may be aggregated (fasciculated) into bundles; no differentiation of primary and secondary elements, and detritus is only rarely incorporated into fibres; fibres have a laminated cortical (bark) region and a distinct central pith (Aplysina aerophoba fibre) of fine spongin fibrils, but the cortex may be reduced or disappear entirely in some species. Mesohyl contains abundant collagenous fibrils. (Aplysina fulva) (Verongula rigida)

Remarks: Four families, Aplysinidae, Aplysinellidae, Pseudoceratinidae and Ianthellidae are known, all of which are thought to be oviparous. Two families, viz. Aplysinidae and Ianthellidae, are represented in the area.

Source: Bergquist, 1980.

Order Verongida