Five new species of Homoscleromorpha (Porifera) of four genera, Oscarella, Plakortis, Plakina and Corticium, are described from vertical walls of reef caves at depths ranging from 23 to 28 m in the Caribbean Sea. Oscarella nathaliae sp. nov. has a leaf-like thinly encrusting, flat body, loosely attached to the substrate and a perforated, not lobate jotia.info by: Phylum Porifera I. General Ecological Characteristics Sponges are: • Sessile, benthic • Filter feeders • Competitors for space • Fed upon by specialist predators • Grow in many forms, solitary, colonial, branching, as thin sheets over substrates • From few cm to over 1 m in size. Porifera. They represent 85–90% of the global sponge fauna and include all of the relatively few freshwater species. Almost all Demospongiae possess a skeleton of siliceous spicules, sometimes supplemented or entirely replaced by an organic collagenous skeleton. A few species completely lack a skeleton. Porifera – Sponges.
New species porifera pdf
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