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Catenella Impudica
''Catenella'' is a genus of red algae belonging to the family Caulacanthaceae. The genus has almost cosmopolitan distribution. Species: *''Catenella caespitosa'' *''Catenella impudica'' References {{Taxonbar, from=Q46208039 Gigartinales Red algae genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catenella Caespitosa
Catenella caespitosa is a small red marine alga. Description This small alga grows to 20 mm high from a discoid holdfast and dark brown in colour. Very irregularly branched, creeping moss-like and terete. Branches easily seen to be constricted at intervals. Medulla, the inner cells, formed of thick-walled filaments and with a cortex of rows of elongated cells radially arranged compact cells.Dixon, P.S. and Irvine, L.M. 1977 ''Seaweeds of the British Isles Volume 1 Rhodophyta Part 1 Introduction, Nemaliales, Gigartinales.''Campbell, A.C.1984. ''The Country Life Guide to the Seashore and Shallow Seas of Britain and Europe'' Habitat, ecology ''Catanella caespitosa'' occurs in shaded sites on rock and around the holdfasts of the fucoids of the upper littoral. Distribution Recorded around the British Isles, from Norway to the Mediterranean and further from the Indian and Pacific Oceans. Reproduction The alga is monoecious, that is both male and female parts to be found on the sam ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Algae
Red algae, or Rhodophyta (, ; ), are one of the oldest groups of eukaryotic algae. The Rhodophyta also comprises one of the largest phyla of algae, containing over 7,000 currently recognized species with taxonomic revisions ongoing. The majority of species (6,793) are found in the Florideophyceae (Class (biology), class), and mostly consist of multicellular, ocean, marine algae, including many notable seaweed, seaweeds. Red algae are abundant in marine habitats but relatively rare in freshwaters. Approximately 5% of red algae species occur in freshwater environments, with greater concentrations found in warmer areas. Except for two coastal cave dwelling species in the asexual class Cyanidiophyceae, there are no terrestrial species, which may be due to an evolutionary bottleneck in which the last common ancestor lost about 25% of its core genes and much of its evolutionary plasticity. The red algae form a distinct group characterized by having eukaryotic cells without flagella and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cosmopolitan Distribution
In biogeography, cosmopolitan distribution is the term for the range of a taxon that extends across all or most of the world in appropriate habitats. Such a taxon, usually a species, is said to exhibit cosmopolitanism or cosmopolitism. The extreme opposite of a cosmopolitan species is an endemic one, being found only in a single geographical location. Qualification The caveat “in appropriate habitat” is used to qualify the term "cosmopolitan distribution", excluding in most instances polar regions, extreme altitudes, oceans, deserts, or small, isolated islands. For example, the housefly is highly cosmopolitan, yet is neither oceanic nor polar in its distribution. Related terms and concepts The term pandemism also is in use, but not all authors are consistent in the sense in which they use the term; some speak of pandemism mainly in referring to diseases and pandemics, and some as a term intermediate between endemism and cosmopolitanism, in effect regarding pandemism as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Catenella Impudica
''Catenella'' is a genus of red algae belonging to the family Caulacanthaceae. The genus has almost cosmopolitan distribution. Species: *''Catenella caespitosa'' *''Catenella impudica'' References {{Taxonbar, from=Q46208039 Gigartinales Red algae genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
