| Grantiidae | |
|---|---|
 | |
| Illustration of Grantia compressa by Ernst Haeckel | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Calcarea |
| Order: | Leucosolenida |
| Family: | Grantiidae Dendy, 1892 |
| Genera | |
| |
Grantiidae is a family of calcareous sponges in the order Leucosolenida. [1]
The calcareoussponges are members of the animal phylum Porifera, the cellular sponges. They are characterized by spicules made of calcium carbonate, in the form of high-magnesium calcite or aragonite. While the spicules in most species are triradiate, some species may possess two- or four-pointed spicules. Unlike other sponges, calcareans lack microscleres, tiny spicules which reinforce the flesh. In addition, their spicules develop from the outside-in, mineralizing within a hollow organic sheath.
Leucosolenida is an order of sponges in the class Calcarea and the subclass Calcaronea. Species in Leucosolenida are calcareous, with a skeleton composed exclusively of free spicules without calcified non-spicular reinforcements.
Achramorphidae is a family of calcareous sponges in the order Leucosolenida.
Amphoriscidae is a family of calcareous sponges in the order Leucosolenida.
Heteropiidae is a family of sea sponges in the order Leucosolenida in the class Calcarea. In a 2012 paper, Oliver Voigt, Eilika Wülfing and Gert Wörheide (2012) confirmed that the family Heteropiidae is not monophyletic./
Jenkinidae is a family of sea sponges in the order Leucosolenida.
Sycanthidae is a family of calcareous sponges in the order Leucosolenida.
Lelapiidae is a family of calcareous sponges in the order Leucosolenida.
Leucosoleniidae is a family of calcareous sponges in the order Leucosolenida.
Sycettidae is a family of calcareous sponges in the order Leucosolenida.
Ascute asconoides is a species of calcareous sponge found in Australia.
Ascute uteoides is a species of calcareous sponge found in Australia.
Stellispongiida is an order of calcareous sponges, most or all of which are extinct. Stellispongiids are one of several unrelated sponge groups described as "inozoans", a name referring to sponges with a hypermineralized calcitic skeleton independent from their spicules. Stellispongiids have a solid skeleton encasing calcite spicules arranged in trabeculae. "Inozoans" and the similar "sphinctozoans" were historically grouped together in the polyphyletic order Pharetronida.
 | This article about a calcareous sponge is a stub. You can help Wikipedia by expanding it. |