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Order of sponges From Wikipedia, the free encyclopedia
Lychniscosida (sometimes spelled Lychniscosa) is an order of sponges belonging to the class Hexactinellida and subclass Hexasterophora.[1][2] They are dictyonal sponges (with parenchymal spicules fully fused into a 3D framework) characterized by the presence of additional struts at the nodes of the skeleton. These struts create octahedral frames, known as lychniscs ("lanterns").
Lychniscosida Temporal range: | |
---|---|
Scientific classification | |
Domain: | Eukaryota |
Kingdom: | Animalia |
Phylum: | Porifera |
Class: | Hexactinellida |
Subclass: | Hexasterophora |
Order: | Lychniscosida Schrammen, 1903 |
Most members of the order are extinct, with their highest diversity as major reef builders in the Jurassic and Cretaceous periods.[3] A few uncertain[4] claims of Triassic lychniscosids have also been reported from China.[5][6] Only three genera are still alive today:[7] Lychnocystis (family Aulocystidae),[8] Neoaulocystis (family Aulocystidae),[8] and Scleroplegma (family Diapleuridae).[9]
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