Capitata is a

suborder Order ( la, ordo) is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between family and class. In biological classification, the order is a taxonomic rank used in the classification of organisms and ...

Hydrozoa Hydrozoa (hydrozoans; ) are a taxonomic class of individually very small, predatory animals, some solitary and some colonial, most of which inhabit saline water. The colonies of the colonial species can be large, and in some cases the specializ ...

, a

class Class or The Class may refer to: Common uses not otherwise categorized * Class (biology), a taxonomic rank * Class (knowledge representation), a collection of individuals or objects * Class (philosophy), an analytical concept used differently ...

of marine

invertebrate Invertebrates are a paraphyletic group of animals that neither possess nor develop a vertebral column (commonly known as a ''backbone'' or ''spine''), derived from the notochord. This is a grouping including all animals apart from the chordate ...

s belonging to the

phylum In biology, a phylum (; plural: phyla) is a level of classification or taxonomic rank below kingdom and above class. Traditionally, in botany the term division has been used instead of phylum, although the International Code of Nomenclatu ...

Cnidaria Cnidaria () is a phylum under kingdom Animalia containing over 11,000 species of aquatic animals found both in Fresh water, freshwater and Marine habitats, marine environments, predominantly the latter. Their distinguishing feature is cnidocyt ...

Characteristics

Members of this suborder are characterised by the

tentacle In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work main ...

s of the polyps terminating in knobs. In some species these are only present in juvenile forms being replaced in adults by more threadlike tentacles. A high

nematocyst A cnidocyte (also known as a cnidoblast or nematocyte) is an explosive cell containing one large secretory organelle called a cnidocyst (also known as a cnida () or nematocyst) that can deliver a sting to other organisms. The presence of this c ...

concentration is present in the knobs. A few species in this group are better known as their solitary

medusa In Greek mythology, Medusa (; Ancient Greek: Μέδουσα "guardian, protectress"), also called Gorgo, was one of the three monstrous Gorgons, generally described as winged human females with living venomous snakes in place of hair. Those ...

form than as their polyp form. These include ''

Sarsia ''Sarsia'' is a genus of hydrozoan in the family Corynidae. Species * '' Sarsia angulata'' (Mayer, 1900) * '' Sarsia apicula'' (Murbach & Shearer, 1902) * ''Sarsia bella'' Brinckmann-Voss, 2000 * '' Sarsia brachygaster'' Grönberg, 1898 * '' Sa ...

'', ''

Polyorchis ''Polyorchis'', or bell jellies, is a genus of hydrozoans in the family Corynidae. They are transparent with red coloration in their internal organs and eye spots around the rim of their bell. The red pigmentation helps them camouflage. They are ...

'' and '' Cladonema''.

Families

According to the

World Register of Marine Species The World Register of Marine Species (WoRMS) is a taxonomic database that aims to provide an authoritative and comprehensive list of names of marine organisms. Content The content of the registry is edited and maintained by scientific speciali ...

, the following

families Family (from la, familia) is a group of people related either by consanguinity (by recognized birth) or affinity (by marriage or other relationship). The purpose of the family is to maintain the well-being of its members and of society. Idea ...

are found in this suborder : *

Asyncorynidae Asyncorynidae is a family of cnidarians belonging to the order Anthoathecata Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long- ...

Kramp, 1949 *

Cladocorynidae Cladocorynidae is a family of cnidarians belonging to the order Anthoathecata Anthoathecata, or the athecate hydroids, are an order of hydrozoans belonging to the phylum Cnidaria. A profusion of alternate scientific names exists for this long ...

Allman, 1872 *

Cladonematidae Cladonematidae is a small family of anthomedusan hydrozoans. They have stolonal hydroid colonies, and their medusae are benthic and can crawl across the sediment; in many species they have lost the ability to swim however.Schuchert 009/ref> Se ...

Gegenbaur, 1857 *

Corynidae Corynidae is a family of hydrozoans in the order Anthomedusae. Derivation of family name The family name ''Corynidae'' is derived from the Greek word κορυνε ( = ''korune'' ) meaning "club" ( in the sense of "cudgel" or "bludgeon" ). Gener ...

Johnston, 1836 *

Halimedusidae Halimedusidae is a family of cnidarians belonging to the order Anthoathecata. Genera: * ''Halimedusa ''Halimedusa'' is a monotypic genus of hydrozoans belonging to the family Halimedusidae Halimedusidae is a family of cnidarians belonging t ...

Arai & Brinckmann-Voss, 1980 *

Hydrocorynidae Hydrocorynidae is a family of cnidarians belonging to the order Anthoathecata. Genera: * ''Hydrocoryne ''Hydrocoryne'' is a genus of cnidarians belonging to the family Hydrocorynidae Hydrocorynidae is a family of cnidarians belonging to the ...

Rees, 1957 *

Milleporidae Fire corals (''Millepora'') are a genus of colonial marine organisms that exhibit physical characteristics similar to that of coral. The name coral is somewhat misleading, as fire corals are not true corals but are instead more closely related ...

Fleming, 1828 *

Moerisiidae Moerisiidae is a family of cnidarians belonging to the order Anthoathecata. Genera: * '' Halmomises'' von Kennel, 1891 * '' Moerisia'' Boulenger, 1908 * ''Odessia ''Odessia'' is a genus of cnidarians belonging to the family Moerisiidae Moeri ...

Poche, 1914 *

Pennariidae ''Pennaria'' is a genus of hydrozoans. It is the only genus within the monotypic family Pennariidae. Species The following species are included in the genus: *''Pennaria armata'' Vanhöffen, 1911 *''Pennaria blistera'' Xu & Huang, 2006 *''Penn ...

McCrady, 1859 *

Porpitidae The chondrophores or porpitids are a small group of hydrozoans in the family Porpitidae. Though it derives from an outdated name for this lineage (see below), some still find the term "chondrophore" useful as a synonym to "porpitid" in discussion ...

Goldfuss, 1818 *

Pseudosolanderiidae ''Pseudosolanderia'' is a genus of cnidarians belonging to the monotypic family Pseudosolanderiidae. Species: *''Pseudosolanderia picardi'' *''Pseudosolanderia sagamina ''Pseudosolanderia'' is a genus of cnidaria Cnidaria () is a phylum ...

Bouillon & Gravier-Bonnet, 1988 *

Rosalindidae Rosalindidae is a family of cnidarians belonging to the order Anthoathecata. Description Rosalindidae are hydrozoans that are characterized by their ability to form colonies of polyps and attach to various surfaces, such as seaweed and shells, ...

Bouillon, 1985 *

Solanderiidae ''Solanderia'' is the sole genus of hydrozoans in the monotypic family Solanderiidae. They are commonly known as tree hydroids or sea fan hydroids. Description ''Solanderia'' hydroids forms large colonies. They are one of about 1000 species of ...

Marshall, 1892 *

Sphaerocorynidae Sphaerocorynidae is a family of cnidarians belonging to the order Anthoathecata. Genera: * '' Astrocoryne'' Maggioni et al., 2017 * ''Corynetes Periphetes (; Ancient Greek: Περιφήτης) is the name of several characters from Greek mytholo ...

Prévot, 1959 *

Teissieridae Teissieridae is a family of cnidarians belonging to the order Anthoathecata. Genera: * ''Pseudosolanderia ''Pseudosolanderia'' is a genus of cnidarians belonging to the monotypic family Pseudosolanderiidae. Species: *''Pseudosolanderia picard ...

Bouillon, 1978 *

Tricyclusidae ''Tricyclusa'' is a monotypic genus of cnidarians belonging to the monotypic family Tricyclusidae. The only species is ''Tricyclusa singularis''. The species is found in Western Europe. References Capitata Hydrozoan genera Monotypic cni ...

Kramp, 1949 * Zancleidae Russell, 1953 *

Zancleopsidae Zancleopsidae is a family of hydrozoans in the order Anthomedusae. References Capitata Cnidarian families {{Anthoathecata-stub ...

Bouillon, 1978

References

Anthoathecata {{Anthoathecata-stub