★ Free online encyclopedia. Did you know? page 111

Ceramium ciliatum

Ceramium ciliatum is a small branched alga. It is basically monosiphonous and composed of large cylindrical cells. Small periaxial cells are formed at the nodes, these produce cortical filaments which form bands around the central cells. The tips ...

Ceramium gaditanum

This finely branched alga grows to a length of 15 cm. Grows with erect axes and with many lateral branches. The branches are completely corticated and not in-rolled at the apices. Very small spines occur near the tips on the outer sides are parse ...

Ceramium pallidum

Ceramium pallidum is a small filamentous, regularly branched delicate alga. The axes can reach 12 cm long and are attached by multicellular rhizoids. The structure is basically of a monosiphonous axis and erect branches with strongly inrolled api ...

Ceramium siliquosum

This small red alga grows to no more than 18 cm high. It is basically monosiponous with distinct main branches which are cylindrical and corticated at the nodes. These incompletely corticate internodes appear collar-like around the branches. The ...

Ceramium strictum

This alga grows in tufts to a length of no more than 12 cm long. It is densely branched but not completely corticate appearing to have a banded or collar-like appearance. The apices of the axes are strongly inrolled. The branches do not have spin ...

Ceramium virgatum

This small alga grows erect with cylindrical filamentous axes. It is repeatedly branched, corticate and grow to 30 cm long. Very difficult to identify from some other species.

Eucheuma denticulatum

Eucheuma denticulatum is a species of red algae and one of the primary sources of iota carrageenan. It exists naturally in the Philippines, tropical Asia, and the western Pacific, but for the commercial extraction of carrageenan it is usually cul ...

Melanothamnus harveyi

Melanothamnus harveyi is a small marine alga which grows in tufts no more than 10 centimetres 3.9 in high. The erect branches are formed by a central axis surrounded by four perecentral cells of the same length. A cortex may develop by cells grow ...

Neorhodomela larix

Neorhodomela larix, commonly known as black pine, is a species of red algae native to coastal areas of the North Pacific, from Mexico to the Bering Sea to Japan. It forms dense mats on semi-exposed rocks in intertidal areas. The thallus is dark b ...

Osmundea hybrida

Osmundea hybrida is small branched alga which grows from a holdfast to 15 mm long. The axes show a main axis with branches which may be spiral or irregular. The main axis may be slightly compressed with a medulla of cells surrounded by a cortex d ...

Phycodrys rubens

Phycodrys rubens is seaweed which is perennial and can grow to 30 cm long and is strongly red in colour. It grows with flat leaf-like blades which are monostromatic, that is composed of a single flat layer of cells and can grow 3 cm wide. These b ...

Polysiphonia brodiei

Polysiphonia brodiei Sprengel, now generally spelled "brodiaei", as it is named after James Brodie is a species of red algae in the Rhodophyta. It grows in tufts up to 36 cm long.

Polysiphonia ceramiaeformis

Polysiphonia ceramiaeformis, also called banded siphon weed, is a small red algae, in the genus Polysiphonia. Individuals are irregularly branched with the branches extending up to 5.5 centimetres from a central node and ending in dense tufts of ...

Polysiphonia fibrata

The branches of P. fibrate are numerous and much interwoven forming tufts up to 20 cm long. They are fine, terete, cylindrical, erect and dull brownish-red in colour. The branches consist of a central axis with 4 pericentral cells all of the same ...

Polysiphonia fibrillosa

Polysiphonia fibrillose is a fine red alga which grows to 25 cm long. The erect cylindrical branches are themselves branched and are attached by a discoid holdfast. The branches consist of a central axis of cells each surrounded by 4 or 5 pericen ...

Polysiphonia foetidissima

Polysiphonia foetidissima grows in dense branching tufts to a length of 11 cm. The fine erect branches have a central axis surrounded by 7 or 8 pericentral cells all of the same length. Rhizoids are produced from the pericentral cells. Trichoblas ...

Polysiphonia furcellata

This red alga is a branched algae growing to 10 cm. The erect branches are ecorticate composed of a central axis of cells surrounded by 7 or 8 paraxial cells, all of the same length in a ring around the axial cells. The rhizoids are numerous grow ...

Polysiphonia morrowii

Polysiphonia morrowii is a species of red algae native to Northeast Asia. It has become an invasive species in Europe, Australia, New Zealand, and South America. It is susceptible to a parasitic infection of the oomycete Pythium porphyrae

Polysiphonia simulans

This small alga is no more than 8 cm long. It appears as a tuft of irregularly branched erect axes. The branches show 10 periaxial cells forming a collar around a central axis without cortication. The pericentral cells are all of the same length. ...

Schottera nicaeensis

The thallus consists of short flat fronds rising from a prostrate terete branched holdfast and growing to a length of about 10 cm. It branches once or twice and bears terete proliferations at the tips.


Acrochaete is a genus of marine green algae of the family Ulvellaceae known to live as endoparasites of other algae, although they may eventually be found growing on inorganic substrates, such as rocks.

Anadyomene (alga)

The valid species currently considered to belong to this genus are: A. saldanhae. A. circumsepta. A. menziesii. A. muelleri. A. leclancheri. A. wrightii. A. flabellata. A. stellata. (А. стеллата) A. linkiana. A. lenormandii. A. rhizoidifera. A. h ...

Blidingia dawsonii

Blidingia dawsonii is a species of seaweed from a family of Ulvaceae that can be found in Canada, Mexico, and US states such as California and Washington. It was described by Hollenberg & I.A.Abbott in 1968. The species are disputed over genus, w ...

Bornetella nitida

Bornetella nitida is a species of marine algae in the Dasycladaceae family. It is found in throughout the Pacific Ocean, including Mauritius, Indonesia, Australia, and Japan.


Calcium and iron are particularly abundant in the general components of the mesophyll, with 20.6% of the protein, 0.5% of the fat, 35.4% of the carbohydrate, 1.5% of the fiber and 22.7% of the mineral. The components of the dried product are crud ...


Cephaleuros is a genus of parasitic thalloid green algae comprising approximately 14 species. Its common name is red rust. Specimens can reach around 10 mm in size. Dichotomous branches are formed. The alga is parasitic on some important economic ...


Cladophoraceae are a family of green algae in the order the Cladophorales. This family includes notably the genus Chaetomorpha which has a few members used in saltwater aquariums.


Dasycladales is an order of large unicellular green algae in the class Ulvophyceae. It contains two families, the Dasycladaceae and the Polyphysaceae. These single-celled algae from 2 mm to 200 mm. They live on the surface in shallow warm marine ...


The extinct genus Hedstroemia was once thought to be a rivulariacean cyanobacterium. It forms oval blobs composed of sinuous tubes that have rounded outlines and occurs in conjunction with Solenopora.


Dilabifilum Tschermak-Woess, 1971, nom. inval., currently regarded as a synonym of Pseudendoclonium. Stromatella Kornmann & Sahling, 1985, nom. inval., currently regarded as a synonym of Neostromatella.


Oltmannsiellopsis is a genus of marine colonial flagellate green algae in the Oltmannsiellopsidaceae family of Chlorophyta. It was named in reference to the similar genus Oltmannsiella. It has three species, O. viridis, which forms four-celled co ...

Percursaria percursa

Percursaria percursa is a species of seaweed from the family Ulvaceae. The species type locality is Denmark. Its floating masses of unbranched filaments are several centimeters in length, 24–32 micrometres broad and 14–18 micrometres thick.


Physolinum is a genus of green algae in the family Trentepohliaceae. The only species in the genus, Physolinum monilia, is currently regarded as a synonym of Trentepohlia rigidula.


Pithophora is a genus of green algae in the family Pithophoraceae. This kind of filamentous algae has a rough texture to it so often called "horsehair".


The Polyphysaceae is a taxonomic family of green algae, one of three families in the order Dasycladales. For single-celled organisms, they are huge, growing to nearly a foot long in some cases.


Printzina lagenifera Hildebrandt Thompson et Wujek. Appears as small, reddish cushion-like mass. Consisting of tangled filaments of spherical or elliptical cells 6 to 12µm wide. It forms a reddish streeks.


Siphonocladus is a small genus of green algae in the family Siphonocladaceae. The algal body is composed of long, club-shaped cells that divide by segregative cell division, followed by the formation of branches that break through the mother cell ...


Struveopsis robusta Setchell & N.L.Gardner Rhyne & H.Robinson, 1968 is now a synonym of Phyllodictyon robustum Setchell & N.L.Gardner Leliaert & Wysor, 2008 Struveopsis siamensis Egerod P.C.Silva, 1996. Struveopsis covalamensis Iyengar P.C.Silva, ...

Trentepohlia (alga)

Trentepohlia is a genus of filamentous chlorophyte green algae in the family Trentepohliaceae, living free on terrestrial supports such as tree trunks and wet rocks or symbiotically in lichens. The filaments of Trentepohlia have a strong orange c ...

Ulvaria (alga)

Ulvaria is a genus of green algae in the family Ulvaceae. It is similar to Ulva, but rather than being two cells thick, it is only one, despite its darker colour.

Valonia (alga)

Valonia is a genus of green algae in the Valoniaceae family. The cells have multiple nuclei and many chloroplasts, each with a pyrenoid. The cells of some species are very large, up to 2 cm in diameter. In some species the colonies maintain a sym ...


Aplacophora is a monophyletic group of small, deep-water, exclusively benthic, marine molluscs found in all oceans of the world. All known modern forms are shell-less: only some extinct primitive forms possessed valves. The group comprises the tw ...


Caudofoveata is a small class within the phylum Mollusca, also known as Chaetodermomorpha. The class is often combined with Solenogastres and termed Aplacophora, but some studies have cast doubt on the monophyly of this group.

Chaetoderma (mollusc)

Chaetoderma marinae. Chaetoderma araucanae. Chaetoderma odhneri. Chaetoderma bacillum. Chaetoderma sibogae. Chaetoderma recisum. Chaetoderma kafanovi. Chaetoderma lucidum. (Chaetoderma лусидум) Chaetoderma californicum. Chaetoderma pellucidum. Ch ...


Falcidens is one of three genera within the Falcidentidae, its radula consists of a single row of teeth which are mineralized in crystalline hydroxyapatite, and its teeth are not periodically shed and replaced like in other molluscs. For details ...


Suborder Chitonina Thiele, 1910. Superfamily Chitonoidea Rafinesque, 1815. Family Ochmazochitonidae Hoare et Smith, 1984. Ochmazochiton Hoare et Smith, 1984. Ischnochiton Gray, 1847. (Ischnochiton Серый, 1847) Stenoplax Carpenter) Dall, 1879. Sub ...

Cyanoplax hartwegii

Cyanoplax hartwegii can reach a length of about 30.8 millimetres 1.21 in. These chiton are red-brown, with dark gray girdle.The surface of the valves is commonly grayish green with dark markings.

Ischnochiton elongatus

Ischnochiton elongatus can reach a length of 25–35 millimetres 0.98–1.38 in. These medium-sized chitons are long oval shaped, with radiating, noduled ribs on the front valve and rows of bumps on the front edge.


Stenoplax Dall, 1879. (Stenoplax Даль, 1879) Ischnochiton Gray, 1847. (Ischnochiton Серый, 1847) Callistochiton Dall, 1879. (Callistochiton Даль, 1879) Simplischnochiton Van Belle, 1974. Ischnochitoninae. Callochiton Gray, 1847. (Callochiton Серы ...


Leptochitonidae is a family of polyplacophoran mollusc. While the subfamily Leptochitoninae has both extant and extinct species, all members of Helminthochitoninae are extinct.

Encyclopedic dictionary

Free and no ads
no need to download or install

Pino - logical board game which is based on tactics and strategy. In general this is a remix of chess, checkers and corners. The game develops imagination, concentration, teaches how to solve tasks, plan their own actions and of course to think logically. It does not matter how much pieces you have, the main thing is how they are placement!

online intellectual game →