More on Parazoa
Porifera - and nearly all are marine; there are four families of freshwater sponges. Sponges are subdivided into three classes.
Anatomy ...
Parazoa
Porifera (Calcarea, Demospongiae, Hexactinellida) Â- Placozoa (Trichoplax)
Mesozoa ...
II. Parazoa or Porifera.
III. Metazoa.
Ceolentera Triploblastica = Diploblastica. (including Coelomata).
White Zoanthid Parazoanthus anguicomus
Most zoanthids are found in tropical waters, but the white zoanthid is common in the north Atlantic. Its white polyps arise from an encrusting base and it has two circles of tentacles around the mouth.
Because of this they are placed in the group Parazoa, which is a sister taxon to all higher animals (metazoa).
Subkingdom Eumetazoa
The kingdom contains two subkingdoms (the other being Subkingdom Parazoa Porifera). The kingdom is then divided into Superphylums, the Superphylum containing the lizards is:
Superphylum: Deuterostomia ...
so that different cells perform different functions, but similar cells are not organized into tissues and bodies are a sort of loose aggregation of different kinds of cells. This is the simplest kind of cellular organization found among parazoans.
tooth coral (Catalaphyllia jardinei)
torch coral (Euphyllia divisa)
tube anemone (Cerianthus sp.)
white carpet anemone (Stichodactyla gigantea)
white plume anemone (Metridium senile)
yellow polyps (Parazoanthus axinellae) ...
 See also: Porifera, Sponge, Coral, Diver, Shell
  
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