Leucosolenida
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Leucosolenida is an order of sponges in the class Calcarea and the subclass Calcaronea.<ref name=":1">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> Species in Leucosolenida are calcareous, with a skeleton composed exclusively of free spicules without calcified non-spicular reinforcements.<ref name=":2">Template:Cite journal</ref><ref name=":3">Template:Citation</ref>
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.<ref name=":3" /> A few sources (such as the Treatise on Invertebrate Paleontology, 2004) place non-asconoid families into a separate order, Sycettida.<ref name=":0">Treatise on Invertebrate Paleontology Part E, Revised. Porifera, Volume 3: Classes Demospongea, Hexactinellida, Heteractinida & Calcarea, xxxi + 872 p., 506 fig., 1 table, 2004, available here. Template:ISBN.</ref> Leucosolenids have a poor fossil record, with only a few ambiguous grantiid fossils reported from the Jurassic and Carboniferous.<ref name=":0" />
FamiliesEdit
- Achramorphidae Borojevic et al., 2002 (formerly known as Staurorrhaphidae)<ref name=":2" />
- Amphoriscidae Dendy, 1892
- Grantiidae Dendy, 1892
- Heteropiidae Dendy, 1892
- Jenkinidae Borojevic et al., 2000
- Lelapiidae? Dendy & Row, 1913
- Leucosoleniidae Minchin, 1900
- Sycanthidae Lendenfeld, 1891
- Sycettidae Dendy, 1892 (sometimes known as Syconidae)<ref name=":1" />
ReferencesEdit
Template:Reflist http://species-identification.org/species.php?species_group=sponges&selected=beschrijving&menuentry=groepen&record=Leucosolenida