Leucosolenida | |
---|---|
Grantia compressa ( Grantiidae) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Porifera |
Class: | Calcarea |
Subclass: | Calcaronea |
Order: |
Leucosolenida Hartman, 1958 |
Families | |
See text. |
Leucosolenida is an order of sponges in the class Calcarea and the subclass Calcaronea. [1] Species in Leucosolenida are calcareous, with a skeleton composed exclusively of free spicules without calcified non-spicular reinforcements. [2] [3]
According to Systema Porifera (2002), Lucosolenida contains 9 families, ranging from fully asconoid forms (Leucosoleniidae) to fully leuconoid forms. These body plans are on a continuum based on an increasingly complex skeletal system and compartmentalized choanocytes. [3] A few sources (such as the Treatise on Invertebrate Paleontology, 2004) place non-asconoid families into a separate order, Sycettida. [4] Leucosolenids have a poor fossil record, with only a few ambiguous grantiid fossils reported from the Jurassic and Carboniferous. [4]
Leucosolenida | |
---|---|
Grantia compressa ( Grantiidae) | |
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Porifera |
Class: | Calcarea |
Subclass: | Calcaronea |
Order: |
Leucosolenida Hartman, 1958 |
Families | |
See text. |
Leucosolenida is an order of sponges in the class Calcarea and the subclass Calcaronea. [1] Species in Leucosolenida are calcareous, with a skeleton composed exclusively of free spicules without calcified non-spicular reinforcements. [2] [3]
According to Systema Porifera (2002), Lucosolenida contains 9 families, ranging from fully asconoid forms (Leucosoleniidae) to fully leuconoid forms. These body plans are on a continuum based on an increasingly complex skeletal system and compartmentalized choanocytes. [3] A few sources (such as the Treatise on Invertebrate Paleontology, 2004) place non-asconoid families into a separate order, Sycettida. [4] Leucosolenids have a poor fossil record, with only a few ambiguous grantiid fossils reported from the Jurassic and Carboniferous. [4]