| Ptychodactis | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Cnidaria |
| Class: | Anthozoa |
| Order: | Actiniaria |
| Family: | Ptychodactinidae Appellöf, 1893 |
| Genus: | Ptychodactis Appellöf, 1893 |
| Synonyms | |
List (Family)
(Genus)
| |
Ptychodactis is a genus of sea anemones. It is the only genus in the monotypic family Ptychodactinidae. [1]
There are two species recognized in the genus: [1]
Chtenopteryx is a genus of small, muscular, midwater squid in the monotypic family Chtenopterygidae. Four species are presently recognized in the genus, but more are believed to exist.
Tube-dwelling anemones or ceriantharians look very similar to sea anemones but belong to an entirely different subclass of anthozoans. They are solitary, living buried in soft sediments. Tube anemones live inside and can withdraw into tubes, which are composed of a fibrous material made from secreted mucus and threads of nematocyst-like organelles known as ptychocysts. Within the tubes of these ceriantharians, more than one polyp is present, which is an exceptional trait because species that create tube systems usually contain only one polyp per tube. Ceriantharians were formerly classified in the taxon Ceriantipatharia along with the black corals but have since been moved to their own subclass, Ceriantharia.
Crown jellyfishes are the six families of true jellyfish that belong to the order Coronatae. They are distinguished from other jellyfish by the presence of a deep groove running around the umbrella, giving them the crown shape from which they take their name. Many of the species in the order inhabit deep sea environments.
Actinoscyphia is a genus of sea anemones of the family Actinoscyphiidae.
Idiosepiidae is a family of mollusc in the class Cephalopoda. This family appears to be related to the cuttlefish in the order Sepiida and the bobtail squid in the order Sepiolida but the exact placement of this family within the Decapodiformes is incertae sedis.
Heteroteuthidinae is a subfamily of bobtail squid encompassing five genera and around ten species.
Rossiinae is a subfamily of bobtail squid encompassing four genera and around twenty species.
Rhodactis is genus of "mushroom corals", which are characterized by large individual polyps that are often reminiscent of a mushroom. Rhodactis are related to stony corals but do not produce a stony skeleton.
Corallimorphus is a genus of colonial anthozoans similar in appearance to sea anemones and in body format to scleractinian stony corals. These animals are cnidarians in the family Corallimorphidae. Members of the genus live off the Pacific coast of the US.
Epiactis is a genus of sea anemones in the family Actiniidae. There are about nineteen recognised species and the type species is Epiactis prolifera.
Heteractis malu, also known as the malu anemone, delicate sea anemone or white sand anemone, is a species of sea anemone in the family Stichodactylidae.
Haliclystidae is a family of stalked jellyfish in the order Stauromedusae.
Corallimorphus niwa is a species of corals in the genus Corallimorphus. It was classified by Fautin in 2011. Corallimorphus niwa lives in marine habitats.
Ptychodactis patula is a species of sea anemone. It occurs in the Arctic and northern Atlantic oceans.
Gonactinia is a monotypic genus of sea anemones, and G. prolifera is the only species in the genus. It is sometimes called the storey anemone and is found on either side of the northern Atlantic Ocean.
Diadumene is a genus of sea anemones. It is the only genus in the monotypic family Diadumenidae.
Bolocera is a genus of sea anemone in the family Actiniidae.
Ptychodactis aleutiensis is a species of sea anemone found off the Aleutian Islands, Alaska.
Manania are a genus of stalked jellyfish in the family Haliclystidae.
Stylobates is a genus of cnidarians belonging to the family Actiniidae.
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