|
Hacrobia Genera
The cryptomonads-haptophytes assemblage is a proposed monophyletic grouping of unicellular eukaryotes that are not included in the SAR supergroup. Several alternative names have been used for the group, including Hacrobia (derived from "ha-" referring to Haptophyta, "-cr-" referring to cryptomonads, and "-bia" as a general suffix referring to life); CCTH (standing for Cryptophyta, Centrohelida, Telonemia and Haptophyta); and "Eukaryomonadae". , it is unclear whether this group is monophyletic or not; results of phylogenetic studies are "often dependent on the selection of taxa and gene data set". Two 2012 studies produced opposite results. Members In the past, heterokonts, haptophytes, and cryptomonads have sometimes been grouped together in a group known as chromists. Though the heterokonts are now split out, Cryptophyta and Haptophyta are considered in some studies to be closely related (and are sometimes simply referred to as the "Cryptophyta+Haptophyta" group). A 2009 pape ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coccolithophore
Coccolithophores, or coccolithophorids, are single celled organisms which are part of the phytoplankton, the autotrophic (self-feeding) component of the plankton community. They form a group of about 200 species, and belong either to the kingdom Protista, according to Robert Whittaker's Five kingdom classification, or clade Hacrobia, according to a newer biological classification system. Within the Hacrobia, the coccolithophores are in the phylum or division Haptophyta, class Prymnesiophyceae (or Coccolithophyceae). Coccolithophores are almost exclusively marine, are photosynthetic, and exist in large numbers throughout the sunlight zone of the ocean. Coccolithophores are the most productive calcifying organisms on the planet, covering themselves with a calcium carbonate shell called a ''coccosphere''. However, the reasons they calcify remains elusive. One key function may be that the coccosphere offers protection against microzooplankton predation, which is one of the ma ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Alveidia
''Ancoracysta twista'' is a eukaryotic microorganism. It is a predatory protist that appears to be sister to Haptista.Janouškovec J, Tikhonenkov DV, Burki F, Howe AT, Rohwer FL, Mylnikov AP, Keeling PJ. "A New Lineage of Eukaryotes Illuminates Early Mitochondrial Genome Reduction", ''Current Biology'' 2017, Description ''Ancoracysta twista'' was first described in November 2017 in ''Current Biology''. It was found in a sample collected from the surface of a tropical aquarium brain coral. It actively feeds on '' Procryptobia sorokini'', probably immobilising its prey through discharging a previously unknown type of extrusome named an ancoracyst. Genetic analysis shows that it is not closely related to any known lineage, but it may be most closely related to a grouping of haptophytes and centrohelids (Haptista). It is notable for having a gene-rich mitochondrial genome, the largest known outside the jakobids or ''Diphylleia rotans''. Uniquely, it appears to contain both the nucleu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goniomonadea
Goniomonadea is a proposed class of cryptomonads which includes the orders Goniomonadida and Hemiarmida. Taxonomy * Order Goniomonadida Novarino & Lucas 1993 oniomonadales Novarino & Lucas 1993** Family Goniomonadidae Hill 1991 oniomonadaceae Hill 1991*** Genus ''Goniomonas'' von Stein 1878 * Order Hemiarmida Cavalier-Smith 2017 ** Family Hemiarmidae Cavalier-Smith 2017 *** Genus ''Hemiarma Hemiarma marina is a monotypic species of cryptomonad discovered off the coast of Palau Palau,, officially the Republic of Palau and historically ''Belau'', ''Palaos'' or ''Pelew'', is an island country and microstate in the western ...'' Shiratori & Ishida 2016 References Cryptomonads {{Hacrobia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cryptomonada
Cryptomonada is a proposed super-class of Cryptists linking Cryptophyceae and Goniomonadea, which was first proposed by Cavalier-Smith in 2004. He made this proposal based on three shared morphological characteristics: Presence of a periplast, ejectisomes with secondary scroll, and mitochondrial cristae A crista (; plural cristae) is a fold in the inner membrane of a mitochondrion. The name is from the Latin for ''crest'' or ''plume'', and it gives the inner membrane its characteristic wrinkled shape, providing a large amount of surface area fo ... with flat tubules. Genetic studies as early as 1994 also supported the hypothesis that ''Goniomonas'' was sister to Cryptophyceae. A study in 2018 found strong evidence that the common ancestor of ''Cryptomonada'' was an autotrophic protist. References {{Taxonbar, from=Q65088966 Cryptista ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leucocryptea
The katablepharids, a group of heterotrophic flagellates, have been considered as part of the Cryptista since katablepharids were described in 1939. Although they differ from other cryptophytes and have even been proposed to be alveolates, early 21st century research suggests they are related to cryptophytes. Phylogeny As of 2009, only five genera and ten species have been formally described. Dozens of other DNA sequences (both freshwater and marine) seem to represent further katablepharids which have not been cultured or formally described. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Super Class Leucocrypta Cavalier-Smith 2015 stat. n. [Kathablepharidophyta (sic)Okamoto & Inouye 2005] ** Class Leucocryptea Cavalier-Smith 2004 [Kathablepharidea (sic) Okamoto & Inouye 2005; Kathablepharidophyceae (sic) Okamoto & Inouye 2005] *** Order Katablepharida Cavalier-Smith 1993 [Kathablepharida (sic)] **** Family Katablepharidae Vors 1992 [Kathablepharidae ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palpitea
Palpitea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Subphylum Palpitia Palpitea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Subphylum Palpitia Cavalier-Smith 2012 ** Class Palpitea Cavalier-S ... Cavalier-Smith 2012 ** Class Palpitea Cavalier-Smith 2012 *** Order Palpitida **** Family Palpitomonadidae ***** Genus '' Palpitomonas'' Yabuki, Inagaki & Ishida 2010 ****** Species '' Palpitomonas bilix'' Yabuki, Inagaki & Ishida 2010 References External links Tree of Life: Hacrobia Cryptista Taxa named by Thomas Cavalier-Smith Monotypic eukaryote classes {{Hacrobia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telonemea
Telonemia is a phylum of microscopic eukaryote, single-celled organisms. They were formerly classified as protists until that kingdom fell out of general use, and are suggested to have evolutionary significance in being a possible transitional form between ecologically important heterotrophic and photosynthetic species among chromalveolates. One paper places them in the SAR supergroup. Phylogenomic analyses of 127 genes place Telonemia with Centroheliozoa in a group also consisting of cryptomonads and haptophytes (see Cryptomonads-haptophytes assemblage). Although they have been studied in primarily marine environments, they have also been found in freshwater. Shalchian-Tabrizi ''et al'' say that 18S rDNA sequences in the phylum formed two major groups, Group 1 and 2, including ''T. subtilis'' and ''T. antarcticum'' respectively, and that these were further sub-divided into several statistically supported clades of sequences with restricted geographic distribution. Species of Te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Picomonadea
Picozoa, Picobiliphyta, Picobiliphytes, or Biliphytes are protists of a phylum of marine unicellular heterotrophic eukaryotes with a size of less than about 3 micrometers. They were formerly treated as eukaryotic algae and the smallest member of photosynthetic picoplankton before it was discovered they don't perform photosynthesis. The first species identified therein is ''Picomonas judraskeda''. They probably belong in the Archaeplastida as sister of the Rhodophyta. They were formerly placed within the cryptomonads-haptophytes assemblage. Discovery At the end of the 1990s the European project "Picodiv" clarified which organisms occur in picoplankton. In addition, for a period of two years, samples were taken in the Atlantic, in the Mediterranean, before the coast of Scotland, Alaska and Norway. Picobiliphyta were found particularly within the nutrient-poor ranges from cold coastal seas, where they can constitute up to 50 percent of the biomass. Affinities to other organisms ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Endohelea
Endohelea is a proposed clade of eukaryotes that are related to Archaeplastida and the SAR supergroup. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Class Endohelea Cavalier-Smith 2012 ** Order Microhelida Cavalier-Smith 2011 *** Family Microheliellidae Cavalier-Smith 2011 **** Genus ''Microheliella'' Cavalier-Smith & Chao 2012 ** Order Heliomonadida Cavalier-Smith 1993 emend. Cavalier-Smith 2012 *** Family Heliomorphidae Cavalier-Smith & Bass 2009 **** Genus ''Heliomorpha'' Cavalier-Smith & Bass 2009 References External links Tree of Life: Hacrobia Cryptista Taxa named by Thomas Cavalier-Smith Bikont classes {{Hacrobia-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Corbihelia
Corbihelia is a proposed phylum of eukaryotes. Classification Based on studies done by Cavalier-Smith, Chao & Lewis 2015 * Super Class Endohelia Cavalier-Smith 2015 ** Class Endohelea Cavalier-Smith 2012 *** Order Microhelida Cavalier-Smith 2011 **** Family Microheliellidae Cavalier-Smith 2011 ***** Genus ''Microheliella'' Cavalier-Smith & Chao 2012 *** Order Heliomonadida Cavalier-Smith 1993 emend. Cavalier-Smith 2012 **** Family Heliomorphidae Cavalier-Smith & Bass 2009 ***** Genus ''Heliomorpha'' Cavalier-Smith & Bass 2009 * Super Class Corbistoma Cavalier-Smith 2015 ** Class Picomonadea Seenivasan et al. 2013 [Biliphyta; Picobiliphytes; Picozoa Seenivasan et al. 2013] *** Order Picomonadida Seenivasan et al. 2013 **** Family Picomonadidae Seenivasan et al. 2013 ***** Genus ''Picomonas'' Seenivasan et al. 2013 ** Class Telonemea Cavalier-Smith 1993 (Telonemia Shalchian-Tabrizi 2006] *** Order Telonemida Cavalier-Smith 1993 **** Family Telonemidae Cavalier-Smith 1993 ***** Genus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prymnesiophyceae
Prymnesiophyceae is a haptophyte class. Although it was originally described by Casper in 1972, it did not receive a Latin diagnosis (a requirement for valid publication under the International Code of Botanical Nomenclature The ''International Code of Nomenclature for algae, fungi, and plants'' (ICN) is the set of rules and recommendations dealing with the formal botanical names that are given to plants, fungi and a few other groups of organisms, all those "trad ...) until Hibberd provided one in 1976. References Haptophytes Bikont classes {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pavlovophyceae
: Pavlovaceae is a family of haptophytes. It is the only family in the order Pavlovales, which is the only order in the class Pavlovophyceae. It contains four genera, ''Diacronema'', ''Exanthemachrysis'', '' Pavlova'' and ''Rebecca Rebecca, ; Syriac: , ) from the Hebrew (lit., 'connection'), from Semitic root , 'to tie, couple or join', 'to secure', or 'to snare') () appears in the Hebrew Bible as the wife of Isaac and the mother of Jacob and Esau. According to biblical ...''. References Haptophytes Eukaryote families {{Haptophyte-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
