CLASSIFICATION OF MICROCIONA
PHYLUM :- PORIFERA (Pore bearing, cellular grade, asymmetrical or radially symmetrical.)
CLASS :- DEMOSPONGIAE (Skeleton of spongin fibres or siliceous spicules which are not six-rayed.)
ORDER :- Monaxonida (Spongin mayor may not be present; spicules monaxon.)
GENUS :- Microciona
Microciona prolifera is very common, in Long Island Sound and also present in South Carolina to Cape Cod.
HABIT AND HABITAT
Microciona is a colonial dimorphic, marine encronting shape. Pound in shallow water as a soft, thin, encrusting layer on rocks,· molluscan shells and calcareous objects and ascending lobes
GENERAL CHARACTERSTICS OF MICROCIONA
- In deep-sea water the colony becomes massive and develops upto 10 cm in total length.
- It is bright red coloured.
- Sponge comprises of several finger like projections in ascending order.
- It has large spicules united by spongin into a regular network.
- It is largely used to study regeneration and reassociation experiments.
- Dissociated cells from same species reaggregate. Humphrey has shown that in this animal calcium and magnesium ions along with some cells surface are necessary for aggregation.
The animal has massive colony, irregularly scattered spicules vase-shaped body, oscula and all above characters, hence it is Halichondria.