| Xanthidium antilopaeum | |
|---|---|
 | |
Scientific classification  | |
| (unranked): | Viridiplantae |
| (unranked): | Charophyta |
| Class: | Zygnematophyceae |
| Order: | Desmidiales |
| Family: | Desmidiaceae |
| Genus: | Xanthidium |
| Species: | X. antilopaeum |
| Binomial name | |
| Xanthidium antilopaeum Kützing | |
Xanthidium antilopaeum is a species of unicellular desmid in the family Desmidiaceae. It is a common, worldwide species found in acidic waters, particularly the edges of large ponds and lakes. [1]
Xanthidium antilopaeum consists of single cells. Cell are symmetrical, with a deep constriction (called an isthmus) dividing the cell into two identical halves called semicells. Cells are about as broad as long, 42–76 μm long and 40–72 μm wide excluding the spines. Semicells are subelliptical to hexagonal with rounded corners. In each semicell, the four corners are extended into a pair of simple, straight or somewhat curved spines. [1]
Xanthidium antilopaeum is one of the most polymorphic desmid species. Over 93 infraspecific taxa have been described within X. antilopaeum. According to Šťastný et al., many of these taxa have "no phylogenetic value", but some may be so distinctive to be their own species. [2] One such example is Xanthidium basiornatum (formerly Xanthidium antilopaeum var. basiornatum). This species is distinguished from X. antilopaeum by having spines with a stout base, a central protuberance on the semicells, and a row of the 12-14 small pits located next to the isthmus. [2]
Some other varieties include:
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Euastrum oblongum is a species of desmid, in the family Desmidiaceae.
Micrasterias is a unicellular green alga of the order Desmidiales. Its species vary in size reaching up to hundreds of microns.
Hydnum repandum, commonly known as the sweet tooth, pig's trotter, wood hedgehog or hedgehog mushroom, is a basidiomycete fungus of the family Hydnaceae. First described by Carl Linnaeus in 1753, it is the type species of the genus Hydnum. The fungus produces fruit bodies (mushrooms) that are characterized by their spore-bearing structures—in the form of spines rather than gills—which hang down from the underside of the cap. The cap is dry, colored yellow to light orange to brown, and often develops an irregular shape, especially when it has grown closely crowded with adjacent fruit bodies. The mushroom tissue is white with a pleasant odor and a spicy or bitter taste. All parts of the mushroom stain orange with age or when bruised.
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Closterium is a genus of desmid, a group of charophyte green algae. It is placed in the family Closteriaceae. Species of Closterium are a common component of freshwater microalgae flora worldwide.
Cosmarium is a genus of freshwater organisms belonging to the Charophyta, a division of green algae from which the land plants (Embryophyta) emerged.
Desmidium is a genus of green algae, specifically of the Desmidiaceae.
Spinoclosterium is a genus of green algae, specifically of the Closteriaceae. It is rare, but widely distributed in freshwater regions throughout the world.
Staurodesmus is a genus of green algae, specifically of the Desmidiaceae.
Triploceras is a genus of desmid in the family Desmidiaceae.
Xanthidium is a genus of green algae, specifically of the Desmidiaceae.
Laccaria amethystina, commonly known as the amethyst deceiver, or amethyst laccaria, is a small brightly colored mushroom, that grows in deciduous and coniferous forests. The mushroom itself is edible, but can absorb arsenic from the soil. Because its bright amethyst coloration fades with age and weathering, it becomes difficult to identify, hence the common name "deceiver". This common name is shared with its close relation Laccaria laccata that also fades and weathers. It is found mainly in Northern temperate zones, though it is reported to occur in tropical Central and South America as well. Recently, some of the other species in the genus have been given the common name of "deceiver".
Psilocybe hoogshagenii is a species of psilocybin mushroom in the family Hymenogastraceae. The mushroom has a brownish conical or bell-shaped cap up to 3 cm (1.2 in) wide that has an extended papilla up to 4 mm long. The stem is slender and 5 to 9 cm long. The variety P. hoogshagenii var. convexa lacks the long papilla.
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Cosmarium tetragonum is a species of green algae in the family Desmidiaceae. It is a freshwater species with a worldwide distribution.
Cosmarium botrytis is a species of green algae in the family Desmidiaceae. It is a freshwater species with a worldwide distribution, and has been recorded from all continents.
Prescottiella is a genus of green algae in the family Desmidiaceae, containing the single species Prescottiella sudanensis. Originally classified as Micrasterias sudanensis in 1958, it was moved into its own genus by Carlos E. M. Bicudo in 1976, due to its asymmetric character. It is named after Gerald Webber Prescott, an American phycologist.
Caloplaca pseudocitrina, a little-known species of lichen saxicolous (rock-dwelling) lichen in the family Teloschistaceae. Found in southern Tajikistan, it has a squamulose (scaley) thallus forming extensive yellow-orange spots. It was formally described as a new species in 2002 by the lichenologists Imomnazar Kudratov and Oleksandr Khodosovtsev.
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