Proboscidoidea
Proboscidoidea is a suborder of hydrozoans in the order Leptothecata. It includes three families and near 150 distinct species. They are characterized by elongated and undercut hypostome In zoology, the hypostome can refer to structures in distinct animal groups: *Hypostome (trilobite), the ventral mouthpart plate in trilobites *Hypostome (tick), the barbed attachment structure associated with the mouthparts of parasitic arachnids ... that creates an indention superior to the gastric cavity. References Leptothecata Cnidarian suborders {{Leptothecata-stub ...
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Bonneviellidae
Bonneviellidae is a family of cnidarians belonging to the order Leptomedusae. The family consists of only one genus: ''Bonneviella'' Broch, 1909. It was named for Norwegian zoologist Kristine Bonnevie Kristine Elisabeth Heuch Bonnevie (8 October 1872 – 30 August 1948) was a Norwegian biologist, Norway's first female professor, women's rights activist and politician for the Free-minded Liberal Party. Her fields of research were cytology, gene ... by then-doctoral student Hjalmar Broth in 1910. References Leptothecata Monogeneric cnidarian families {{Leptothecata-stub ...
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Campanulariidae
Campanulariidae is a family of animals in the phylum Cnidaria, or stinging-celled animals. Campanulariidae is composed entirely of hydroids, a Greek term meaning "water animals" applied to the plant-like polyp colonies of the class Hydrozoa. All species of the Campanulariidae are aquatic in habitat, primarily inhabiting coastal regions and tidal pools. ''Obelia'' contains probably the most well-known species of this phylum, and include four species. All are around 20–35 cm in height with a series of branches carrying the individual polyps. One species, ''Obelia longissima'', is unique for its ability to produce obelin, a photoprotein which allows for bioluminescence. The genus '' Laomedea'' includes such species as '' Laomedea angulata'' and '' Laomedea flexuosa'', which are similar in appearance to the ''Obelia'', though they are smaller and lack a medusa stage present in ''Obelia''. Taxonomy and systematics The following genera are classified in the family Campanulariid ...
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Phialuciidae
''Phialucium'' is a genus of cnidarians belonging to the monotypic family Phialuciidae. The species of this genus are found in India Ocean, Malesia Malesia is a biogeographical region straddling the Equator and the boundaries of the Indomalayan and Australasian realms, and also a phytogeographical floristic region in the Paleotropical Kingdom. It has been given different definitions. ..., Australia. Species: *'' Phialucium carolinae'' *'' Phialucium condensum'' *'' Phialucium mbenga'' *'' Phialucium multitentaculatum'' References Leptothecata Hydrozoan genera {{Leptothecata-stub ...
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Hydrozoan
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 specialized individual animals cannot survive outside the colony. A few genera within this class live in freshwater habitats. Hydrozoans are related to jellyfish and corals and belong to the phylum Cnidaria. Some examples of hydrozoans are the freshwater jelly (''Craspedacusta sowerbyi''), freshwater polyps ('' Hydra''), ''Obelia'', Portuguese man o' war (''Physalia physalis''), chondrophores (Porpitidae), "air fern" (''Sertularia argentea''), and pink-hearted hydroids (''Tubularia''). Anatomy Most hydrozoan species include both a polypoid and a medusoid stage in their lifecycles, although a number of them have only one or the other. For example, ''Hydra'' has no medusoid stage, while '' Liriope'' lacks the polypoid stage. Polyps The hydroid f ...
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Leptothecata
Leptothecata, or thecate hydroids, are an order (biology), order of hydrozoans in the phylum Cnidaria. Their closest living relatives are the athecate hydroids, which are similar enough to have always been considered closely related, and the very apomorphic Siphonophorae, which were placed outside the "Hydroida". Given that there are no firm rules for synonym (biology), synonymy for high-ranked taxa, alternative names like Leptomedusa, Thecaphora or Thecata, with or without the ending emended to "-ae", are also often used for Leptothecata. Leptothecata is surrounded by a chitinous outer layer as its exoskeleton, including gonophores, their reproductive organ. Leptothecata obtain radial symmetry, in which their gonads can be found in their radial canals. Their morphological characters normally have ranged from benthic to planktonic stages. Characters associated with benthic are the polyps and colony forms, while planktonic is medusae. Leptothecata has a vast and complex variation a ...
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Family (biology)
Family ( la, familia, plural ') is one of the eight major hierarchical taxonomic ranks in Linnaean taxonomy. It is classified between order and genus. A family may be divided into subfamilies, which are intermediate ranks between the ranks of family and genus. The official family names are Latin in origin; however, popular names are often used: for example, walnut trees and hickory trees belong to the family Juglandaceae, but that family is commonly referred to as the "walnut family". What belongs to a family—or if a described family should be recognized at all—are proposed and determined by practicing taxonomists. There are no hard rules for describing or recognizing a family, but in plants, they can be characterized on the basis of both vegetative and reproductive features of plant species. Taxonomists often take different positions about descriptions, and there may be no broad consensus across the scientific community for some time. The publishing of new data and opi ...
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Hypostome
In zoology, the hypostome can refer to structures in distinct animal groups: *Hypostome (trilobite), the ventral mouthpart plate in trilobites *Hypostome (tick), the barbed attachment structure associated with the mouthparts of parasitic arachnids *Hypostome (cnidarian) 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 specialized ...