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Starlet Sea Anemone
The starlet sea anemone (''Nematostella vectensis'') is a species of small sea anemone in the Family (biology), family Edwardsiidae native to the east coast of the United States, with introduced populations along the coast of southeast England and the west coast of the United States (class ''Anthozoa'', phylum ''Cnidaria'', a sister group of Bilateria). Populations have also been located in Nova Scotia, Canada. This sea anemone is found in the shallow brackish water of coastal lagoons and salt marshes where its slender column is usually buried in the mud and its tentacles exposed. Its genome has been sequenced and it is cultivated in the laboratory as a model organism, but the IUCN has listed it as being a "Vulnerable species" in the wild. Description The starlet sea anemone has a bulbous basal end and a contracting column that ranges in length from less than . There is a fairly distinct division between the scapus, the main part of the column, and the capitulum, the part just bel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Thomas Alan Stephenson
Thomas Alan Stephenson Royal Society, FRS (19 January 1898 – 3 April 1961) was a British naturalist, and marine biology, marine biologist, specialising in sea anemones. Education Stephenson was born at Burnham-on-Sea, the son of a Minister of religion, minister and amateur botany, botanist. He soon developed an interest in natural history and went to study at University of Wales, Aberystwyth, University College, Aberystwyth. He began to study the local sea anemones there, but had to abandon his studies because of illness. Despite not completing his degree, he was made a staff member and was later awarded a doctorate for the body of work that he had produced. Career Stephenson held a number of academic posts in Britain, and at the University of Cape Town, South Africa. His final position was that of Professor and Head of the Department of Zoology at the University College of Wales, Aberystwyth. The National Marine Biological Library at the Marine Biological Association of th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cerastoderma Glaucum
''Cerastoderma glaucum'', the lagoon cockle, is a species of saltwater clam, a marine bivalve mollusc in the family Cardiidae, the cockles. This species is found along the coasts of Europe and North Africa, including the Mediterranean and Black Seas and the Caspian Sea, and the low-salinity Baltic Sea. It is a euryhaline species living in salinities 4-100 ‰.Russell PJ, Petersen GH (1973) The use of ecological data in the elucidation of some shallow water European ''Cardium'' species. ''Malacologia'' 14:223–232Nikula R, Väinölä R (2003) Phylogeography of ''Cerastoderma glaucum'' (Bivalvia: Cardiidae) across Europe: A major break in the Eastern Mediterranean. ''Marine Biology'' 143: 339-350 In north-west Europe (including the British Isles), it typically does not live on open shores but rather in shallow burrows in saline lagoons, or sometimes on lower shores in estuaries. It cannot tolerate significant exposure to the air. The form found in lagoons is thinner-shelled than th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ostracod
Ostracods, or ostracodes, are a class of the Crustacea (class Ostracoda), sometimes known as seed shrimp. Some 70,000 species (only 13,000 of which are extant) have been identified, grouped into several orders. They are small crustaceans, typically around in size, but varying from in the case of ''Gigantocypris''. Their bodies are flattened from side to side and protected by a bivalve-like, chitinous or calcareous valve or "shell". The hinge of the two valves is in the upper (dorsal) region of the body. Ostracods are grouped together based on gross morphology. While early work indicated the group may not be monophyletic and early molecular phylogeny was ambiguous on this front, recent combined analyses of molecular and morphological data found support for monophyly in analyses with broadest taxon sampling. Ecologically, marine ostracods can be part of the zooplankton or (most commonly) are part of the benthos, living on or inside the upper layer of the sea floor. While Myodoc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cladophora
''Cladophora'' is a genus of reticulated filamentous Ulvophyceae (green algae). The genus ''Cladophora'' contains many species that are very hard to tell apart and classify, mainly because of the great variation in their appearances, which is affected by habitat, age and environmental conditions. Unlike ''Spirogyra'' the filaments of ''Cladophora'' branch and do not undergo conjugation. There are two multicellular stages in its life cycle – a haploid gametophyte and a diploid sporophyte – which look highly similar. The only way to tell the two stages apart is to either count their chromosomes, or examine their offspring. The haploid gametophyte produces haploid gametes by mitosis and the diploid sporophyte produces haploid spores by meiosis. The only visible difference between the gametes and spores of ''Cladophora'' is that the gametes have two flagella and the spores have four. The ''Cladophora'' species can be a major nuisance causing major alteration to benthic condition ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spartina Alterniflora
''Sporobolus alterniflorus'', or synonymously known as ''Spartina alterniflora'', the smooth cordgrass, saltmarsh cordgrass, or salt-water cordgrass, is a perennial deciduous grass which is found in intertidal wetlands, especially estuarine salt marshes. It has been reclassified as ''Sporobolus alterniflorus'' after a taxonomic revision in 2014, but it is still common to see ''Spartina alterniflora'' and in 2019 an interdisciplinary team of experts coauthored a report published in the journal ''Ecology'' supporting ''Spartina'' as a genus. It grows tall and has smooth, hollow stems that bear leaves up to long and wide at their base, which are sharply tapered and bend down at their tips. Like its relative saltmeadow cordgrass ''S. patens'', it produces flowers and seeds on only one side of the stalk. The flowers are a yellowish-green, turning brown by the winter. It has rhizoidal roots, which, when broken off, can result in vegetative asexual growth. The roots are an important f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Spartina Patens
''Sporobolus pumilus'', the saltmeadow cordgrass, also known as salt hay, is a species of cordgrass native to the Atlantic coast of the Americas, from Newfoundland south along the eastern United States to the Caribbean and north-eastern Mexico. It was reclassified after a taxonomic revision in 2014, but the older name, ''Spartina patens'', may still be found in use. It can be found in marshlands in other areas of the world as an introduced species and often a harmful noxious weed or invasive species. It is a hay-like grass found in the upper areas of brackish coastal salt marshes. It is a slender and wiry plant that grows in thick mats 30–60 cm high, green in spring and summer, and turns light brown in late fall and winter. The stems are wispy and hollow, and the leaves roll inward and appear round. Because its stems are weak, the wind and water action can bend the grass, creating the appearance of a field of tufts and cowlicks. Like its relative smooth cordgrass, saltmead ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruppia
''Ruppia'', also known as the widgeonweeds, ditch grasses or widgeon grass, is the only extant genus in the family Ruppiaceae, with eight known species. These are aquatic plants widespread over much of the world. The genus name honours Heinrich Bernhard Rupp, a German botanist (1688-1719). They are widespread outside of frigid zones and the tropics. Description The leaf is simple and not rhizomatous. They can be annual (commonly) or perennial (rarely); stem growth is conspicuously sympodial, but sometimes is not. These species are adapted to be in brackish water (and salt marshes). The leaves are small or medium-sized. Their disposition can be alternate, opposite, or whorled (usually alternate except when subtending an inflorescence). Even, lamina keep entire and are setaceous or linear. The leaf just shows one vein without cross-venules. Stomata are not present. The mesophyll leaks calcium oxalate crystals. The minor leaf veins do not present phloem transfer cells and leaks ves ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chaetomorpha
''Chaetomorpha'' is a genus of green algae in the family Cladophoraceae.Guiry, M. D. (2004)''Chaetomorpha''.''In:'' Guiry, M. D. & Guiry, G. M. (2017). AlgaeBase. Accessed through: World Register of Marine Species on 9 August 2017. Members of this genus may be referred to by the common name sea emerald. Description Algae of this genus are made up of macroscopic filaments of cylindrical cells. The genus is characterized by its unbranched filaments, making it distinctive; its closest relatives are branching species of the genus ''Cladophora''.Leliaert, Frederik, et al. (2011)Atypical development of ''Chaetomorpha antennina'' in culture (Cladophorales, Chlorophyta).''Phycological Research'' 59.2 91-97. Species There are about 50 species. Species include: * '' Chaetomorpha adriani'' * ''Chaetomorpha aerea'' * '' Chaetomorpha akineta'' * ''Chaetomorpha antennina'' * '' Chaetomorpha bangioides'' * ''Chaetomorpha basiretrorsa'' * '' Chaetomorpha billardierii'' * '' Chaetomorpha b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foxtail Stonewort
Foxtail or fox tail may refer to: Plants * Foxtail (diaspore), the dry spikelet or spikelet cluster of some grasses ** ''Alopecurus'', foxtail grasses - the scientific name literally means "fox tail" ** ''Bromus madritensis'', foxtail brome ** ''Hordeum jubatum'', foxtail barley ** ''Setaria'', foxtail millets * ''Acalypha hispida'', chenille plant or fox tail * ''Asparagus densiflorus'', foxtail fern * ''Lycopodium clavatum'', foxtail clubmoss * ''Wodyetia'', foxtail palm * ''Agave attenuata'', an agave species also known as the Foxtail Other uses * Foxtail Peak Foxtail Peak () is a peak, high, on the north side of Neumayer Glacier, west of Carlita Bay, South Georgia. It was charted by the Swedish Antarctic Expedition, 1901–04, under Otto Nordenskiöld. It was surveyed by the South Georgia Sur ..., Antarctica * Foxtail, a character in the animated series ''OK K.O.! Let's Be Heroes'' {{disambiguation, plants ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gammarus Insensibilis
''Gammarus insensibilis'', the lagoon sand shrimp, is a species of amphipod crustacean Crustaceans (Crustacea, ) form a large, diverse arthropod taxon which includes such animals as decapods, seed shrimp, branchiopods, fish lice, krill, remipedes, isopods, barnacles, copepods, amphipods and mantis shrimp. The crustacean group can ... found in coastal lagoons. It grows to long. References insensibilis Crustaceans of the Atlantic Ocean Crustaceans described in 1966 {{Amphipod-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monocorophium Insidiosum
''Monocorophium'' is a genus of amphipod crustaceans. Species The genus ''Monocorophium'' comprises the following species: *'' Monocorophium acherusicum'' (Costa, 1853) *'' Monocorophium californianum'' (Shoemaker, 1934) *'' Monocorophium carlottensis'' Bousfield & Hoover, 1997 *'' Monocorophium cylindricum'' (Say, 1818) *'' Monocorophium insidiosum'' (Crawford, 1937) *'' Monocorophium josei'' Valério-Berardo & Thiago de Souza, 2009 *'' Monocorophium oaklandense'' (Shoemaker, 1949) *'' Monocorophium sextonae'' (Crawford, 1937) *'' Monocorophium steinegeri'' ( Gurjanova, 1951) *'' Monocorophium tuberculatum'' (Shoemaker, 1934) *'' Monocorophium uenoi'' (Stephensen, 1932) ''Monocorophium acherusicum'' ''Monocorophium acherusicum'' is a small (5 mm) species. It is brown with a very short abdomen, and has three little spines on its enlarged second antennae. It has rows of hair on its anterior legs, which it uses to filter food from the water. It naturally occurs in Europe, bu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amphipod
Amphipoda is an order of malacostracan crustaceans with no carapace and generally with laterally compressed bodies. Amphipods range in size from and are mostly detritivores or scavengers. There are more than 9,900 amphipod species so far described. They are mostly marine animals, but are found in almost all aquatic environments. Some 1,900 species live in fresh water, and the order also includes the terrestrial sandhoppers such as ''Talitrus saltator''. Etymology and names The name ''Amphipoda'' comes, via New Latin ', from the Greek roots 'on both/all sides' and 'foot'. This contrasts with the related Isopoda, which have a single kind of thoracic leg. Particularly among anglers, amphipods are known as ''freshwater shrimp'', ''scuds'', or ''sideswimmers''. Description Anatomy The body of an amphipod is divided into 13 segments, which can be grouped into a head, a thorax and an abdomen. The head is fused to the thorax, and bears two pairs of antennae and one pair of se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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