Voragonema Laciniata
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Voragonema Laciniata
''Voragonema'' is a genus of hydrozoans belonging to the family Rhopalonematidae. The genus comprises four species.Lindsay, Dhugal & Francesc Pagès, 2010. "''Voragonema tatsunoko'' (Trachymedusae: Rhopalonematidae) a new species of benthopelagic medusa, host to the hyperiid amphipod ''Mimonectes spandli'' (Physosomata: Mimonectidae)." ''Zootaxa'' 2671: 31-39. Unlike most hydromedusae, these do not have a sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ... stage. Rather, they spend their entire lives in the water column as plankton. Centripetal expansions protruding from the ring canal is a characteristic that separates this genus from other genera in the family Rhopalonematidae. Species *'' Voragonema laciniata'' *'' Voragonema pedunculata'' *'' Voragonema profundicola' ...
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Voragonema Laciniata
''Voragonema'' is a genus of hydrozoans belonging to the family Rhopalonematidae. The genus comprises four species.Lindsay, Dhugal & Francesc Pagès, 2010. "''Voragonema tatsunoko'' (Trachymedusae: Rhopalonematidae) a new species of benthopelagic medusa, host to the hyperiid amphipod ''Mimonectes spandli'' (Physosomata: Mimonectidae)." ''Zootaxa'' 2671: 31-39. Unlike most hydromedusae, these do not have a sessile Sessility, or sessile, may refer to: * Sessility (motility), organisms which are not able to move about * Sessility (botany), flowers or leaves that grow directly from the stem or peduncle of a plant * Sessility (medicine), tumors and polyps that ... stage. Rather, they spend their entire lives in the water column as plankton. Centripetal expansions protruding from the ring canal is a characteristic that separates this genus from other genera in the family Rhopalonematidae. Species *'' Voragonema laciniata'' *'' Voragonema pedunculata'' *'' Voragonema profundicola' ...
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Voragonema Pedunculata
''Voragonema pedunculata'' is a small red hydrozoan with a diameter reaching 4 cm. It has 1000-2000 fine tentacles. It is found in the Pacific Ocean with known distributions in Monterey Bay, California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ..., United States and the San Clemente Basin. References Rhopalonematidae Animals described in 1913 {{hydrozoa-stub ...
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Voragonema Profundicola
''Voragonema'' is a genus of hydrozoans belonging to the family Rhopalonematidae. The genus comprises four species.Lindsay, Dhugal & Francesc Pagès, 2010. "''Voragonema tatsunoko'' (Trachymedusae: Rhopalonematidae) a new species of benthopelagic medusa, host to the hyperiid amphipod ''Mimonectes spandli'' (Physosomata: Mimonectidae)." ''Zootaxa'' 2671: 31-39. Unlike most hydromedusae, these do not have a sessile stage. Rather, they spend their entire lives in the water column as plankton. Centripetal expansions protruding from the ring canal is a characteristic that separates this genus from other genera in the family Rhopalonematidae. Species *''Voragonema laciniata ''Voragonema'' is a genus of hydrozoans belonging to the family Rhopalonematidae. The genus comprises four species.Lindsay, Dhugal & Francesc Pagès, 2010. "''Voragonema tatsunoko'' (Trachymedusae: Rhopalonematidae) a new species of benthopelag ...'' *'' Voragonema pedunculata'' *'' Voragonema profundicola'' ...
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Hydrozoans
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 fo ...
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Rhopalonematidae
Rhopalonematidae is a family of hydrozoans. The family comprises 15 genera and 36 species. Genera *'' Aglantha'' (4 species) *'' Aglaura'' (monotypic – ''Aglaura hemistoma'') *'' Amphogona'' (3 species) *'' Arctapodema'' (4 species) *'' Benthocodon'' (2 species) *'' Colobonema'' (3 species) *''Crossota ''Crossota'' is a genus of hydrozoans of the family Rhopalonematidae. The genus comprises five species. Unlike most hydromedusae, these do not have a sessile stage. Rather, they spend their entire lives in the water column as plankton. The genus ...'' (5 species) *'' Pantachogon'' (3 species) *'' Persa'' (monotypic – ''Persa incolorata'') *'' Ransonia'' (monotypic – ''Ransonia krampi'') *'' Rhopalonema'' (2 species) *'' Sminthea'' (2 species) *'' Tetrorchis'' (monotypic – ''Tetrorchis erythrogaster'') *'' Vampyrocrossota'' (monotypic – ''Vampyrocrossota childressi'') *'' Voragonema'' (4 species) References * Schuchert, Peter (2005)The Hydrozoa Directory†Retriev ...
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Hydromedusae
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 fo ...
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Sessility (zoology)
Sessility is the biological property of an organism describing its lack of a means of self-locomotion. Sessile organisms for which natural ''motility'' is absent are normally immobile. This is distinct from the botanical concept of sessility, which refers to an organism or biological structure attached directly by its base without a stalk. Sessile organisms can move via external forces (such as water currents), but are usually permanently attached to something. Organisms such as corals lay down their own substrate from which they grow. Other sessile organisms grow from a solid such as a rock, dead tree trunk, or a man-made object such as a buoy or ship's hull. Mobility Sessile animals typically have a motile phase in their development. Sponges have a motile larval stage and become sessile at maturity. Conversely, many jellyfish develop as sessile polyps early in their life cycle. In the case of the cochineal, it is in the nymph stage (also called the crawler stage) that the ...
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