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Thuiaria Articulata
''Thuiaria articulata'', the jointed hydroid or sea spleenwort, is a branching colonial hydroid in the family Sertulariidae Sertulariidae is a family of hydrozoans. Genera According to the World Register of Marine Species, the following genera belong to this family: *'' Abietinaria'' Kirchenpauer, 1884 *'' Amphisbetia'' L. Agassiz, 1862 *'' Caledoniana'' Galea, 2015 .... Description Jointed hydroids look like a child's drawing of a Christmas tree. They have an upright stem with side branches that emerge in pairs and extend upwards from the 'trunk'. The branches all grow in one plane. The colony is usually 4–8 cm in total height but may grow to 22 cm.Branch, G.M., Branch, M.L, Griffiths, C.L. and Beckley, L.E. 2010. ''Two Oceans: a guide to the marine life of southern Africa'' Distribution This colonial animal is found off the length of the South African coast down to 135m under water. It is also found at Vema Seamount. Ecology Jointed hydroids live in shelter ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 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 polyp (zoology), polypoid and a medusa (biology), 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 tetraphylla, Lir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 opini ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sertulariidae
Sertulariidae is a family of hydrozoans. Genera According to the World Register of Marine Species, the following genera belong to this family: *'' Abietinaria'' Kirchenpauer, 1884 *'' Amphisbetia'' L. Agassiz, 1862 *'' Caledoniana'' Galea, 2015 *'' Caminothujaria'' von Campenhausen, 1896 *'' Crateritheca'' Stechow, 1921 *'' Dictyocladium'' Allman, 1888 *'' Diphasia'' Agassiz, 1862 *'' Dynamena'' Lamouroux, 1812 *'' Fraseroscyphus'' Boero & Bouillon, 1993 *'' Geminella'' Billiard, 1925 *'' Gigantotheca'' Vervoort & Watson, 2003 *'' Gonaxia'' Vervoort, 1993 *'' Hydrallmania'' Hincks, 1868 *'' Hypopyxis'' Allman, 1888 *'' Idiellana'' Cotton & Godfrey, 1942 *'' Mixoscyphus'' Peña Cantero & Vervoort, 2005 *'' Papilionella'' Antsulevich & Vervoort, 1993 *'' Polysertularella'' Antsulevich, 2011 *''Salacia In ancient Roman mythology, Salacia ( , ) was the female divinity of the sea, worshipped as the goddess of salt water who presided over the depths of the ocean. Neptune was her c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vema Seamount
Vema Seamount is a seamount in the South Atlantic Ocean. Discovered in 1959 by a ship with the same name, it lies from Tristan da Cunha and northwest of Cape Town. The seamount has a flat top at a mean depth of which was eroded into the seamount at a time when sea levels were lower; the shallowest point lies at depth. The seamount was formed between 15-11 million years ago, possibly by a hotspot. The seamount rises high enough that its summit is at shallow depth, allowing sunlight to reach it and thus permitting the growth of kelp and algae. A number of sea animals and fish are encountered on the seamount; active fisheries existed at Vema Seamount and caused the disappearance of some animal species. History Vema Seamount was discovered by the research ship RV Vema of the Lamont–Doherty Earth Observatory in 1959. Vema is one of the first seamounts to be the subject of scientific study, and the first seamount investigated by scuba divers without special equipment. Vema li ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animals Described In 1766
Animals are multicellular, eukaryotic organisms in the biological kingdom Animalia. With few exceptions, animals consume organic material, breathe oxygen, are able to move, can reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of cells, the blastula, during embryonic development. Over 1.5 million living animal species have been described—of which around 1 million are insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a bilaterally symmetric body plan. The Bilateria include the protostomes, containing animals such as nematodes, arthropods, flatworms, annelids and molluscs, and the deuterostomes, containing the echinoderms and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
