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Encyclopedia > Calcarea


Calcareous sponges
Scientific classification
Kingdom: Animalia
Phylum: Porifera
Class: Calcarea
Orders

Subclass Calcinea
    Clathrinida
    Murrayonida
Subclass Calcaronea
    Leucosoleniida
    Lithonida

The Calcareous sponges belong to the Class Calcarea and are characterized by spicules made out of calcium carbonate (calcite). If one were to look at a poriferan spicule under the microscope, it might resemble the mercedes_bens emblem. Indeed, this is how the spicules in Calcaerous sponges look. However, instead of the common three-pointed star shape, Calcaerous spicules can be four-pointed.


All sponges in this class are strictly marine dwellers. All three body plans are represented within class Calcarea : asconoid, syconoid, and leuconoid. Typically, Calcaerous sponges are very small, ranging from 3-4 inches in height. Of the 15,000 or so species of Porfiera that exist, 150 of those are Calcaerous.


Calcareous sponge is a class of the Phylum Porifera. The species of Calcarea varies from radial symmetrical vase shaped body types to colonies made up of a reticulum of thin tubes or irregular massive forms. Calcareous sponges are generally characterized by their endoskeleton made up of spicules, they are sedentary filter feeders, and lack any real tissues. Calcareous sponges are most commonly found in shallow tropical waters. Generally, Calcarea are small sponges. The different shapes of calcareous sponges are relatively simple, either purse, vase, pear or cylinder-shaped. And the skeleton has a either a mesh or honeycomb structure. Unlike most other sponges, calcareous sponges lack hollow canals, which makes the sponge stronger.




  Results from FactBites:
 
Calcarea (244 words)
Memebers of the group Calcarea are the only sponges that possess spicules composed of calcium carbonate.
The Calcarea first appears at the base of the Lower Cambrian and has persisted until the present.
The basal group of the Calcarea is the Heteractinida.
Calcarea Carbonica - Homeopathic remedy - Materia Medica - Homeopathy - Calc-c (7607 words)
Calcarea carbonica is a remedy with which we confirm our theory for a human being after the state in which he was born - the health state.
Calcarea carbonica people are quite balanced and they have to push themselves quite a lot before they can really unbalance themselves to the extent that they get this state of mind.
Response : Calcarea carbonica is a "1" in the repertory.
  More results at FactBites »

 
 

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