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Hungerfordia (alga)
''Hungerfordia'' is a genus of presumed marine algae first described by Fry and Banks in 1955 in describing ''Hungerfordia dichotoma'' from Late Devonian strata. It has been interpreted as a probable brown (Phaeophyte) algae though the possibility that it represents a red (Rhodophyte) alga is not excluded - the taxonomic challenge being that modern red and brown algae are differentiated on the basis of colour and cellular structure which are not preserved in the fossil taxa (Hiller and Gess, 1996, Gess and Whitfield). Douglas and Jell (1985) suggested that ''Buthotrephis trichotoma'' and ''B. divaricata'' should furthermore be transferred from ''Buthotrephis'' to ''Hungerfordi''a. A further species, ''Hungerfordia fionae'' from the Late Devonian of South Africa is known from the largest sample, analysis of which suggests that variations used to differentiate between ''H. dichotoma'' and ''H. trichotoma'' may represent growth variations accountable by a single taxon. ''Hungerfor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phaeophyte
Brown algae (singular: alga), comprising the class Phaeophyceae, are a large group of multicellular algae, including many seaweeds located in colder waters within the Northern Hemisphere. Brown algae are the major seaweeds of the temperate and polar regions. They are dominant on rocky shores throughout cooler areas of the world. Most brown algae live in marine environments, where they play an important role both as food and as a potential habitat. For instance, ''Macrocystis'', a kelp of the order Laminariales, may reach in length and forms prominent underwater kelp forests. Kelp forests like these contain a high level of biodiversity. Another example is ''Sargassum'', which creates unique floating mats of seaweed in the tropical waters of the Sargasso Sea that serve as the habitats for many species. Many brown algae, such as members of the order Fucales, commonly grow along rocky seashores. Some members of the class, such as kelps, are used by humans as food. Between 1,500 and 2 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhodophyte
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), and mostly consist of multicellular, marine algae, including many notable 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 centrioles, chloroplasts that lac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterloo Farm Lagerstätte
The Waterloo Farm lagerstätte is a Famennian lagerstätte in South Africa that constitutes the only known record of a near-polar Devonian coastal ecosystem. History and discovery The Waterloo Farm Lagerstätte is an approximately 360 million year old Famennian (latest Devonian) fossil-rich locality of the Witpoort Formation (Witteberg Group, Cape Supergroup) in Makhanda (former Grahamstown) within the Eastern Cape Province, South Africa. Before it’s discovery very little was known of life during the Famennian (see Late Devonian extinction) in what is now southern Africa . This is largely due to the fact that fossils in the Witpoort Formation generally occur in black anaerobically deposited metashale that rapidly degrades near surface and is therefore rarely seen in natural outcrop. As is the case with many other scientific discoveries, the discovery of Waterloo Farm was accidental. Uprisings against the apartheid system in South Africa had by the mid-1980s escalated to vi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Makhanda, Eastern Cape
Makhanda, also known as Grahamstown, is a town of about 140,000 people in the Eastern Cape province of South Africa. It is situated about northeast of Port Elizabeth and southwest of East London. Makhanda is the largest town in the Makana Local Municipality, and the seat of the municipal council. It also hosts Rhodes University, the Eastern Cape Division of the High Court, the South African Library for the Blind (SALB), a diocese of the Anglican Church of Southern Africa, and 6 South African Infantry Battalion. Furthermore, located approximately 3 km south-east of the town lies the world renowned Waterloo Farm, the only estuarine fossil site in the world from 360 million years ago with exceptional soft-tissue preservation. The town's name-change from Grahamstown to Makhanda was officially gazetted on 29 June 2018. The town was officially renamed to Makhanda in memory of Xhosa warrior and prophet Makhanda ka Nxele. History Founding Makhanda was founded as Grahams ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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