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Hedstroemia
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''. ''Hedstroemia'' was formerly assigned to the now obsolete taxon porostromata. In 2020, the genus was assigned to the cyanobacteria order Nostocales The Nostocales are an order of cyanobacteria containing most of its species. It includes filamentous forms, both simple or branched, and both those occurring as single strands or multiple strands within a sheath. Some members show a decrease in .... References * Ulvophyceae genera Bryopsidales {{Ulvophyceae-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Porostromata
"Porostromata" is an antiquated form taxon that refers to fossil cyanobacteria. The term porostromate is also used as a descriptor of textures and microstructure of stromatolites and oncolites which contain tubules or other cellular structures. The group was defined by Pia (1927) as containing calcareous algae bearing calcified tubules; these may run parallel to the growth surface as in ''Girvanella'', ''Sphaerocodium'' or perpendicular, as in ''Hedstroemia'', '' Ortonella'', and '' Mitcheldaenia''; however, in 1937 Pia restricted the group to only ''Girvanella'' and ''Sphaerocodium'', placing the other genera in the Codiaceae. In reality it seems that most or all of the species included in "Porostromata" represent fossils of cyanobacteria. Monty (1981) advocated continued use of porostramata in an informal sense to describe a habit and structure of bacterial colonies, rather than in a taxonomic sense. He defined a "porostromate" microstructure as follows:"Porostromate microst ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
August Rothpletz
Friedrich August Rothpletz (28 April 1853, in Neustadt an der Haardt – 27 January 1918, in Oberstdorf) was a German geologist and paleontologist. Biography From 1875 to 1880 he conducted geological mapping in Saxony as part of the ''Sächsischen Geologischen Landesanstalt'' (Saxon Geological Survey), afterwards receiving his doctorate from the University of Leipzig (1882). Two years later he obtained his habilitation at the University of Munich, where he taught classes in geology, Alpine tectonics and paleobotany. In 1894 he became an associate professor and in 1904 succeeded Karl von Zittel as professor of geology and paleontology at Munich. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Journal Of Systematic Palaeontology
The ''Journal of Systematic Palaeontolog'y'' (Print: , online: ) is a peer-reviewed scientific journal of palaeontology published by Taylor & Francis on behalf of the British Natural History Museum. , the editor-in-chief is Paul D. Taylor. The journal covers papers on new or poorly known faunas and floras and new approaches to systematics. It was established in 2003. According to the ''Journal Citation Reports'', the journal has a 2014 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a scientometric index calculated by Clarivate that reflects the yearly mean number of citations of articles published in the last two years in a given journal, as ... of 3.727, ranking it second out of 49 journals in the category 'Paleontology'. References External links * Paleontology journals Taylor & Francis academic journals Quarterly journals Publications established in 2003 English-language journals {{paleo-journal-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivulariacea
The Rivulariaceae are a family of cyanobacteria within the Nostocales in which the filaments (trichomes) are tapered from wider at the base to narrower at the tip. The type species is '' Rivularia haematites'' (Dc) C. A. Agardh. Genera , WoRMS listed the following genera under Rivulariaceae: * '' Amphithrix'' Bornet & Flahault, 1886 * '' Ariasmontanoa'' Molinari & Guiry, 2021 * ''Calothrix'' C.Agardh ex Bornet & Flahault, 1886 * '' Dichothrix'' Zanardini ex Bornet & Flahault, 1886 * '' Gaillardotella'' Bory de Saint-Vincent ex Kuntze, 1898 * '' Gardnerula'' G.De Toni, 1936 * '' Gloiotrichia'' J.Agardh, 1842 * ''Heteractis'' A.P.de Candolle, 1838 * '' Isactis'' Thuret ex Bornet & Flahault, 1886 * ''Macrochaete'' Berrendero, J.R.Johansen & Kastovsky, 2016 * '' Mastigonema'' H.Schwabe ex A.B.Frank, 1886 * ''Montanoa'' P.González, 1947 * '' Nunduva'' L.González-Resendiz, H.León-Tejera & J.R.Johansen, 2018 * '' Phyllonema'' D.O.Alvarenga, J.Rigonato, L.H.Z.Branco, I.S.Melo & M. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solenopora
The extinct Solenoporaceae have traditionally been interpreted as a group of red algae ancestral to the Corallinales. The genus from which they take their name, ''Solenopora'', originates in the Ordovician. Unlike the Corallinaceae, this family has large vegetative cells and an undifferentiated thallus. Additionally there are external, non-calcified sporangia. The differences in structure suggest that the holotype is not an alga at all, but rather is a chaetetid sponge. Post-Palaeozoic specimens therefore require re-classification. However, some algal taxa are still classified within the genus. Some specimens of algal ''Solenopora'' retain an original pink colouration, which is banded with growth stages of the fossil; this is produced by boron-containing hydrocarbons. The solenoporaceae mineralized with calcite. Other genera within the Solenoporaceae Although the following other genera have been included in this family, their status is uncertain due to the loose definitio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nostocales
The Nostocales are an order of cyanobacteria containing most of its species. It includes filamentous forms, both simple or branched, and both those occurring as single strands or multiple strands within a sheath. Some members show a decrease in width from the base, and some have heterocysts Heterocysts or heterocytes are specialized nitrogen-fixing cells formed during nitrogen starvation by some filamentous cyanobacteria, such as ''Nostoc punctiforme'', ''Cylindrospermum stagnale'', and ''Anabaena sphaerica''. They fix nitrogen from .... References Bacteria orders {{cyanobacteria-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AlgaeBase
AlgaeBase is a global species database of information on all groups of algae, both marine and freshwater, as well as sea-grass. History AlgaeBase began in March 1996, founded by Michael Guiry. Text was copied from this source, which is available under Attribution 4.0 International (CC BY 4.0)licence. (Sehere. By 2005, the database contained about 65,000 names. In 2013, AlgaeBase and the Flanders Marine Institute (VLIZ) signed an end-user license agreement regarding the Electronic Intellectual Property of AlgaeBase. This allows the World Register of Marine Species (WoRMS) to include taxonomic names of algae in WoRMS, thereby allowing WoRMS, as part of the Aphia database, to make its overview of all described marine species more complete. Synchronisation of the AlgaeBase data with Aphia and WoRMS was undertaken manually until March 2015, but this was very time-consuming, so an online application was developed to semi-automate the synchronisation, launching in 2015 in conju ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ulvophyceae Genera
The Ulvophyceae or ulvophytes are a class of green algae, distinguished mainly on the basis of ultrastructural morphology, life cycle and molecular phylogenetic data.Graham LE, Graham JM, Wilcox LW (2009) ''Algae''. 2nd Edition. Benjamin Cummings (Pearson), San Francisco, CA The sea lettuce, ''Ulva'', belongs here. Other well-known members include ''Caulerpa'', ''Codium'', ''Acetabularia'', ''Cladophora'', '' Trentepohlia'' and ''Monostroma''. The Ulvophytes are diverse in their morphology and their habitat. Most are seaweeds such as those listed above. Others, such as ''Rhizoclonium'', ''Pithophora'' and some species of ''Cladophora'' live in fresh water and in some areas are considered weeds. Evolution The origin and early diversification of the Ulvophyceae likely took place in the late Neoproterozoic. Although most contemporary ulvophytes are marine macroalgae (seaweeds), ancestral ulvophytes may have been freshwater, unicellular green algae. Molecular phylogenetic eviden ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
