Cratostigma | |
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Scientific classification | |
Kingdom: | Animalia |
Phylum: | Chordata |
Subphylum: | Tunicata |
Class: | Ascidiacea |
Order: | Stolidobranchia |
Family: | Pyuridae |
Genus: | Cratostigma Monniot & Monniot, 1961 |
Species | |
See text |
Cratostigma is a genus of ascidian tunicates in the family Pyuridae.
A genus is a taxonomic rank used in the biological classification of living and fossil organisms, as well as viruses, in biology. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus.
Ascidiacea is a paraphyletic class in the subphylum Tunicata of sac-like marine invertebrate filter feeders. Ascidians are characterized by a tough outer "tunic" made of the polysaccharide cellulose.
A tunicate is a marine invertebrate animal, a member of the subphylum Tunicata. It is part of the Chordata, a phylum which includes all animals with dorsal nerve cords and notochords. The subphylum was at one time called Urochordata, and the term urochordates is still sometimes used for these animals. They are the only chordates that have lost their myomeric segmentation, with the possible exception of the seriation of the gill slits.
Species within the genus Cratostigma include: [1]
Herdmania is a genus of ascidian tunicates in the family Pyuridae.
Molguloides is a genus of marine tunicates.
Oligotrema is a genus of marine tunicates.
Fungulus is a genus of marine tunicates.
Bathyoncus is a genus of ascidian tunicates in the family Styelidae.
Bathystyeloides is a genus of ascidian tunicates in the family Styelidae.
Dicarpa is a genus of ascidian tunicates in the family Styelidae.
Metandrocarpa is a genus of ascidian tunicates in the family Styelidae.
Monandrocarpa is a genus of ascidian tunicates in the family Styelidae.
Seriocarpa is a genus of ascidian tunicates in the family Styelidae.
Stolonica is a genus of ascidian tunicates in the family Styelidae.
Symplegma is a genus of ascidian tunicates in the family Styelidae.
Tibitin is a genus of ascidian tunicates in the family Styelidae.
Gamaster is a genus of ascidian tunicates in the family Molgulidae.
Minipera is a genus of ascidian tunicates in the family Molgulidae.
Namiella is a genus of ascidian tunicates in the family Molgulidae.
Protomolgula is a genus of ascidian tunicates in the family Molgulidae.
Bathypyura is a genus of ascidian tunicates in the family Pyuridae.
Bolteniopsis is a genus of ascidian tunicates in the family Pyuridae.
Heterostigma is a genus of ascidian tunicates in the family Pyuridae.
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