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Sweeping along 156 miles of Floridaâs eastern coast, the Indian River Lagoon (IRL) is home to a wealth of habitats and spectacular biodiversity. These web pages are currently under construction and expansion. Diatoms are unicellular, photosynthetic phytoplankton whose bodies are made up of silica, or glass. COSCINODISCUS CONCINNUS AND C. GRANII 687 phery 10-12 in 10 /an (PI. Silica Nanowire Growth on Coscinodiscus Species Diatom Frustules via VaporâLiquidâSolid Process Aobo Li, Mechanical Engineering, Boston University, Boston, MA, 02215 USA. Species Coscinodiscus lacustris Grunow. Brooks, M. 1975. The minimum price for an image is 49$. Click on the blue (text) link to the left. Only taxa used by the PMN are listed. Coscinodiscus genus, a type of diatoms with complex frustule, has been widely studied and reported because of their delicate nanostructures. Image in the highest quality is 4319 x 4110px, 300 dpi, and costs 449$. PHYTOPLANKTON ID GUIDE â Lesson 1: Phytoplankton Microscopy Lab Advance Preparation: Queue the PowerPoint, "Introduction to Plankton." ... Coscinodiscus -These centric diatoms are single cells that do not have adaptations to help them stay afloat in the water column. A difference in type. Definition: Siliceous ooze is a marine sediment composed of the debris of plankton with silica shells, such as diatoms and radiolaria. They occur as single cells or in chains or other loose aggregates. Coscinodiscus are a genus of diatoms. A-P-H-O-T-O - Nature and Wildlife Stock Image Libraries that further environmental awareness and education through the medium of photography. Coscinodiscaceae is a diatom family in the order Coscinodiscales. Taxon Profile: Coscinodiscus subtilis Taxonomy details. Hierarchy. Studies on the genus Coscinodiscus. 2. Coscinodiscus granii Taxonomy ID: 265552 (for references in articles please use NCBI:txid265552) current name 5. Light, transmission and scanning electron microscopy of C. concinnus Wm. The precise identification of a phytoplankton species is a crucial step in the investigation of harmful algal ... Record Id: Latitude and Longitude 4. TN2014 [2] Coscinodiscus wailesii [11] Dyntaxa. Rectangular shaped cell with projections off each corner; may form chains 33641. HK263 Coscinodiscus ⦠Taxonomy. Although there are numerous reports of Coscinodiscus from inland localities, those which have been thoroughly investigated turn out to be species of Actinocyclus (Hasle, 1977) or Thalassiosira (Round et al., 1990). The book compiles the latest taxonomic names, an extensive bibliography (referencing historical as well as up-to-date literature), synthesis and criteria in one indispensable source. Indian River Lagoon Species Inventory Home. This is a cosmopolitan species in cold temperate to tropical waters. (A narrated version can be found here.) This version, enlarged and modified from the earlier literature, deals with the identification of marine diatoms and dinoflagellates. In naming species, a heterotypic synonym is one that comes into being when a taxon becomes part of a different taxon. If a taxon has a synonym it is linked to the recommended synonym. C. granii can be easily identified in girdle view due to its wedged shape. It is presumed that the species was introduced into Europe by importing young Japanese oysters, although it's also possible that the introduction took place via ballast water of cargo ships. Diatomea redonda de agua salada probable Coscinodiscus - Round saltwater diatom likely Coscinodiscus ... We appreciate any help in their identification Oblique light and ⦠This Genus currently has 55 taxonomic siblings (listed below) and an expanded tree of 55 members (self + siblings + sub-siblings). As dinoflagellates, the organisms have two unlike flagella and have both plant and animal characteristics; their taxonomic placement as algae is Coscinodiscus Ehrenberg, 1839: Spesies lihat teks Coscinodiscus adalah genus diatom dalam keluarga Coscinodiscaceae. Genera Brightwellia Coscinodiscus Craspedodiscus Palmeria Palmerina Stellarima. a solitary diatom Diatoms are one of the most important groups of producer organisms in the marine ecosystem. Coscinodiscus wittianus Pantocsek, Arachnoidiscus Bailey, Cyclotella Kutzing, Actinoptyclrus Ehrenberg, Actinocyclus Ehrenberg, Hyalodiscus Ehrenberg. - Coscinodiscus spp. 18: 1-13. Coscinodiscus curvatulus, Actinoptychus senarius, Coscinodiscus ocuidis,lus-ir Coscinodiscus lentiginosa, and Thalassiosira nordenskioeldii. Coscinodiscus lacustris, Thalassiosira bramaputrae. Taxonomy navigation. Dead Coscinodiscus form siliceous ooze s. They were sessile organisms. Alien species Originally, the diatom Coscinodiscus wailesii only occurred in the Pacific and Indian Ocean. Taxa as originally reported appear in the main body of the list. Coscinodiscus. They are very small, measuring around 150um in length and many can be found within a single drop of water. Prorocentrum, Coscinodiscus, and others) in each sample in screens or macrophytes were determined using microscopy. References. Compare to homotypic. Coscinodiscus is a genus of diatoms in the family Coscinodiscaceae. It is the type genus of its family. Actinocyclus normanii was found throughout a sediment core from a marsh near the Christina River, Delaware. Cells of this species is highly variable in shape and size (Figs. It is therefore desirable to examine the three taxa for specific differences, so that proper and consistent identifications may be made. Species in this genus are laterally compressed with a small, cap-like epitheca and a much larger hypotheca (dorso- ventral depth of epitheca is 1/2 to 2/3 of hypotheca). C. japonicus, representing Group 1, has a single marginal ring of rimoportulae including two macrorimoportulae. Cretaceous diatoms are also found in deep sea core samples from various locations. Phytoplankton Identification Keys. The precise identification of a phytoplankton species is a crucial step in the investigation of harmful algal Coscinodiscus wailesii is a diatom, a type of algae, which is native throughout the Pacific Ocean. We investigated their seasonal and inter-annual distributions at two fixed stations in ⦠Presence of a porous, rigid cell wall (frustule) made mostly of silica . Coscinodiscus is a genus of diatoms in the family Coscinodiscaceae. Coscinodiscus 6. In the process, some b. identification of your specimen using the Plankton Identification Chart 6. Search for more papers by this author. I. Rank: Genus: Status: accepted: Aphia ID: urn:lsid:marinespecies.org:taxname:148917: NCBI ID: 33641: Common names: ã³ã¹ãããã£ã¹ã¯ã¹ Environments I A) . Learn vocabulary, terms, and more with flashcards, games, and other study tools. Cells may be solitary (such as Coscinodiscus sp. granii were approximated to a simple cylinder shape, as this is the geometric model suggested for Coscinodiscus by current references (Hillebrand et al., 1999; Sun and Liu, 2003). The shape of the cell in lateral view is the most important criterion used for identification (Taylor et al., 1995). 3. Coscinodiscus spp., Pseudo-nitzschia spp., Skeletonema spp., Chaetoceros spp., Rhizosolenia spp., and Ceratium spp., were categorized as potentially harmful microalgal. ), 1997 . There were marked central rosettes of 5-10 larger areolae and these were often eccentrically placed. Coscinodiscus oligocenicus, Pseudostictodiscus picus, Triceratium radiosoreticulatum, and Trochosira spinosa suggests that Group 1 is characteristic of the upper Oligocene. Coscinodiscus radiatus. According to Witkowski et al. Recent work indicates an important role for long-chain polyamines in guiding silica precipitation as well as in silica-pattern formation. We noticed that all the culture tubes had a line of sediment where the diatoms seemed to have stuck to the walls. 2018-09-28 06:05:49 Johanne Arff - Updated media metadata for Coscinodiscus radiatus_8.jpg ; 2018-09-27 07:53:32 Johanne Arff - Updated media metadata for Coscinodiscus radiatus_8.jpg ; 2018-09-27 07:39:46 Johanne Arff - Updated media metadata for Coscinodiscus radiatus_8.jpg ; 2018-09-27 07:37:47 Johanne Arff - Added media: Coscinodiscus radiatus_8.jpg This ID sheet is designed to aid NOAA Phytoplankton Monitoring Network (PMN) citizen scientists on basic phytoplankton identification. The morphological similarity of Coscinodiscus asteromphalus, C. centralis, and C. concinnusmay cause identification problems, as stated in the first phytoplankton reports from the Oslofjord and the Skagerrak at the turn of the century. concinnus (W.Smith) Van Heurck, 1896 Homonyms Coscinodiscus concinnus Wm.Smith, 1856 Coscinodiscus concinnus Miquel, 1894 Common names Under high powers the areolae showed a well-marked single pore at the lower level (PI ID. ) Gene Stoermer: Identification: This cylindrical diatom occurs singly or in groups and may sometimes be found enveloped in a gelatinous matrix. Identifying Marine Phytoplankton is an accurate and authoritative guide to the identification of marine diatoms and dinoflagellates, meant to be used with tools as simple as a light microscope. Similar to those of Actinocyclus, species of Coscinodiscus lack processes other than labiate processes and spines. Identifying Marine Diatoms and Dinoflagellates is the second identification manual created from the literature developed for the Advanced International Phytoplankton Course. COPEPEDIA is an in-development project. Tewnty-nine species of phytoplankton were identified in Benoa Bay. Coscinodiscus jonesianus (Greville) Ostenfeld, 1915. Coscinodiscus is a genus of diatoms in the family Coscinodiscaceae. Frustule with short pervalvar axis. Coscinodiscus. Coscinodiscus morphotype Among those, Coscinodiscus spp. The result is an effective attempt of circular diatom identification based on texture character. Photography: S. Morton Illustrations: Cupp, E.E., 1943. was the most abundant and widely distributed species in Benoa Bay. Scientific name i. Coscinodiscus. External links. Species of Group 1 like Cladogramma dubium, Coscinodiscus nitidus, s. vetustissimus, Eucampia balaustium, and Goniothecium tenue, suggest a Miocene age. We encourage new contributors to submit taxon pages. Species Coscinodiscus kuetzingii A. Schmidt, 1878. Coscinodiscus granii.jpeg 800 × 600; 68 KB. Spherical cell; may have a dark band around the edge and a dark center Odontella sp. [4] Coscinodiscus sp. Informasi terkait dengan Coscinodiscus dari Wikispecies. x; UniProtKB. The typification of the diatom species Coscinodiscus concinnus Wm. III. Datasets. Phytoplankton Identification Guide Prepared by Emi Yamaguchi & Andy Gould (2007) Coscinodiscus sp. Coscinodiscus sp. species) and Coscinodiscus (3 species). CCMP1583 Coscinodiscus sp. ... (3 measured using Lackey drop-transect method. This project depends on many people to document the diverse diatom flora of streams, rivers, wetlands, lakes, springs, soils, estuaries and coastal zones. Help pages, FAQs, UniProtKB manual, documents, news archive and Biocuration projects. C. radiatus is ⦠"Phytoplankton diatom Coscinodiscus sp" is an authentic stock image by ScienceRF. Central area variable, with indistinguishable rosette or conspicuous rosette of larger areolae ⦠This is a cosmopolitan species in cold temperate to tropical waters. Repeat this procedure with as many different organisms as time permits. Coscinodisucs is photosynthetic using light to produce organic matter. Choose one > Coscinodiscus centralis > Coscinodiscus concinnus > Coscinodiscus granii > Coscinodiscus janischii > Coscinodiscus jonesianus > Coscinodiscus radiatus > Coscinodiscus wailesii > environmental samples > unclassified Coscinodiscus. Prorocentrum micans is an armoured, marine, planktonic, bloom -forming dinoflagellate. centralis Grunow 1884 Close. Coscinodiscus japonicus, Coscinodiscus morsianus and Coscinodiscus solidus are described in order to illustrate three different types of process pattern present in Coscinodiscus species from the Cretaceous and Palaeocene. The diatoms were morphologically identified and isolated using micro capillary-pipette and serial dilution method. Specialising in Royalty Free Stock Images and Photography of Wildlife and Nature; Plants, Animals, Fungi, Marine, Sea and Shorelife. Coscinodiscus janischii Coscinodiscus jonesianus Coscinodiscus radiatus Coscinodiscus wailesii unclassified Coscinodiscus Coscinodiscus sp. ⺠Coscinodiscaceae. Rank: Genus: Status: accepted: Aphia ID: urn:lsid:marinespecies.org:taxname:148917: NCBI ID: 33641: Common names: ã³ã¹ãããã£ã¹ã¯ã¹ Environments Cells are circular in shape containing many areolae or pores. Common name(s): diatom. Coscinodiscus wailesii is a diatom, a type of algae, which is native throughout the Pacific Ocean. The earliest records of this species in the Atlantic Ocean are for Chesapeake Bay in 1961. Since then, it has been found in the lower Chesapeake Bay and along the continental shelf between Cape Charles VA and Cape May NJ. There is one labiate process. Sequence archive. Phytoplankton Identification Guide Prepared by Emi Yamaguchi & Andy Gould (2007) Coscinodiscus sp. Coscinodiscus sp. C6 Coscinodiscus sp. Ehrenberg, 1839. In this paper, a dual beam system focused ion beam and scanning electron microscope (FIB-SEM) were applied to precisely investigate the microstructure of diatom cell walls, in particular, aiming to reveal the hierarchical pores of the valve. Coscinodiscus wailesii and Thalassiosira punctigera have a much later start than Odontella sinensis. However, due to temporary sampling site ... identification system based on hypotheses, and while this system is the most modern one, Coscinodiscus sp. Cells are solitary and contain numerous chloroplasts. Species Coscinodiscus marginatus Ehrenberg, 1844. Automatic Identification of Round Diatom Qiaoqi Luo, Yahui Gao *, Jinfei Luo, Changping Chen, Chenhui Yang Junrong Liang School of Information Science and Technology School of Life Sciences Xiamen University Xiamen University Xianmen, China Xiamen, China chyang@xmu.edu.cn gaoyh@xmu.edu.cn *Corresponding author: Gao Yahui, gaoyh AbstractâIn this work, a method for automatic identification ⦠Since then, it has been found in the lower Chesapeake Bay and along the continental shelf between Cape Charles VA ⦠Itâs available in the following resolutions: 1600 x 1523px, 2600 x 2474px, 4319 x 4110px. Pranala luar. It was abundant in the English Channel in the years 1980-1981, but declined in later years [26]. The shape of the valve face varies. (heterotypic) Coscinodiscus oculus-iridis var. Coscinodiscus asteromphalus var. Description of coscinodiscus radiatus 8. I had a few questions: 1. Rectangular shaped cell with projections off each corner; may form chains Browse the list of datasets and find organisations you can join if you are interested in participating in a survey for species like Coscinodiscus marginatus Ehrenberg, 1844. Cell sizes can range 15 mm - 1000 mm, although most diatom sizes range from 50 to 500 mm. Coscinodiscus concinnus [6] Coscinodiscus granii [3] Coscinodiscus jonesianus [1] Coscinodiscus oculus-iridis [2] Coscinodiscus radiatus [4] Coscinodiscus sp. Coscinodiscus radiatus.jpg 898 × 824; 81 KB. Studies on the Genus Coscinodiscus. The oomycete parasitoid Lagenisma coscinodisci is widespread in the northern hemisphere on its hosts in the genus Coscinodiscus. Species identification is mainly based on variations of their hierarchically organized silica structures. [ About COPEPEDIA] Close. It is box shaped in girdle view and the valves are very flat. Context Taxon Id 95044 Authority Ehrenb., 1841 Naming Status Currently accepted name Status Found in the Antarctica/subantarctic or Southern Ocean See map of extents Taxon has been resolved to the rank Species. Taxonomical identification of the microalgae RESULTS The water samples were collected using plankton- net (25 μm in size) and preserved with a 10 % Species diversity and microalgae ecology characte- Lugolâs solution. Species Coscinodiscus megalomma A. W. F. Schmidt. Valve circular, flat, 19 to 218 mm in diameter, with rounded margins and shallow mantle, with one to two rows of areolae. The Taxa were briefly documented in a list including identification references and morphometric data. Prorocentrum micans is an armoured, marine, planktonic, bloom -forming dinoflagellate. Wikispecies has information related to Coscinodiscaceae This page was last edited on 26 February 2021, ⦠C. radiatus is one of the smaller Coscinodiscus species. Because of its potential ecological importance, it would be a suitable pathogen model to investigate plankton/para-site interactions, but the species cannot be cultivated on media without its host, so far. Diatoms (Class Bacillariophyceae) 1. Want to see an alphabetical list of ALL species within this taxa group? Particularly striking silica frameworks are found among diatoms that belong to the genus Coscinodiscus. Honestly I was able to figure out the first two because I knew they were single celled. A 100 µm spot size of a red laser beam is narrowed up to less than 10 µm at a distance of 104 µm after the transmission through the regular geometry of the diatom structure, which thus acts as a microlens. If an amateur diatomist had a really big boat, drilling rig, and unlimited funds, he could sail the high seas dredging and drilling. A 1.3 megapixel Moticam 1000 camera was also Coscinodiscus is a species of diatom which belongs to a group of ocean algaeâphytoplankton. Plankton: Drifting Plants and Animals of the Ocean Name Section ID Rebekah Andrews 598 Exercise 1: Identifying Phytoplankton What evidence did you use to make your choices of phytoplanktons? Journal of the Marine Biological Association of the United Kingdom. Rex Lowe: Identification: This often highly silicified diatom exhibits tangentially undulate valves and usually contains a few disc-shaped chromatophores. Coscinodiscaceae adalah keluarga diatom dalam ordo Coscinodiscales Halaman ini terakhir diubah pada 30 Januari 2017, pukul 16.34. Botanica Marina. In this work, we report on the light focusing ability exploited by the microshell of a marine organism: the Coscinodiscus wailesii diatom. ), linked by various arrangements into chains (such as Thalassiosira sp. Help. Coscinodiscus spp. AlgaeBase is a global algal database of taxonomic, nomenclatural and distributional information. concinnus Photographer: Gabriela Hannach: Click on a thumbnail to view a full size image â Back to photos page. Ceratium, genus of single-celled aquatic dinoflagellate algae (family Ceratiaceae) common in fresh water and salt water from the Arctic to the tropics. 1,2,4-8) (see Bursa, 1959, Dodge, 1975 ). Then, the Coscinodiscus cf. Corpus ID: 82157786 室å å¹é¤å®é¨ã®çµæ, Coscinodiscus wailesiiã¯åºç¯å²ã®æ¸©åº¦, 塩忡件ã§å¢æ®ãå¯è½ã§ãã, 墿®é度ã¯, 温度20a25â, å¡©å20a30ã®ç¯å²ã§é«ãå¤ã示ã, æå¤§å¤ã¯ä¾è©¦æ ª4æ ªã®å¹³åå¤ â¦ Coscino-discus wailesii is a giant diatom, ... lematic identification described under different names [25]. Coscinodiscus fallax, Contricribra weissflogii, Micropodiscus weissflogii, Thalassiosira fluviatilis. Many diatom bodies manifest in simple geometric shapes, and Coscinodiscus is no different with a body shaped like a squat cylindrical drum. Pictures are copyright protected. Taxonomic Description: P. micans is a bivalvate species often observed in valve view. Coscinodiscus curvatulus, Actinoptychus senarius, Coscinodiscus ocuidis,lus-ir Coscinodiscus lentiginosa, and Thalassiosira nordenskioeldii. (Ed. With deep pockets he could travel the world sampling exotic foods and drinking fine wines while collecting diatomite. ), ... identification key is designed simply as a tool to help volunteers and others glimpse the diversity and beauty of a few common species. Bibliographic References. Totally, five diatoms namely Odontella aurita, Thalassiosira subtilis, Chaetoceros curvisetus, Skeletonema costatum and Coscinodiscus centralis were isolated from Cuddalore coastal waters. More Taxa Info; Guides; Places; Site Stats; Help; Video Tutorials; Log In or Sign Up Heterotypic. Coscinodiscus Craspedodiscus Palmeria Palmerina Stellarima. 1,2,4-8) (see Bursa, 1959, Dodge, 1975 ). The areolae form disctinct rows radiating from the valve centre, with a central rosette of slightly larger areolae. Cell diameter 30 â 500 um. GGM-2004 Coscinodiscus sp. Spherical cell; may have a dark band around the edge and a dark center Odontella sp. The earliest records of this species in the Atlantic Ocean are for Chesapeake Bay in 1961. It is the type genus of its family. Coscinodiscus species Coscinodiscus marginatus Name Homonyms Coscinodiscus marginatus Kützing, 1844 Coscinodiscus marginatus Schmidt, 1874 Coscinodiscus marginatus Janisch, 1862 Coscinodiscus marginatus Ehrenb. tenuistriata Grunow 1884 (heterotypic) (Guiry and Guiry 2011) Views of the centric diatom Coscinodiscus wailesii Light micrographs of a living cell in face view (a) and side view (b); many small discoid chloroplasts are visible. The morphology of the valve of Coscinodiscus wailesii and the development of its siliceous architecture, studied in the SEM and TEM, is compared with valve formation in Thalassiosira eccentrica (Ehrenberg.) Light, Transmission and Scanning Electron Microscopy of C granii Gough @inproceedings{Brooks1975StudiesOT, title={Studies on the Genus Coscinodiscus. Smith and Coscinodiscus granii Gough. Start studying Identification CPOB2. datasets have provided data to the NBN Atlas for this species. 35 LG-2014 Coscinodiscus sp. Cells of this species is highly variable in shape and size (Figs. However, due to temporary sampling site ... identification system based on hypotheses, and while this system is the most modern one, Abstract The diatoms Odontella sinensis, Coscinodiscus wailesii and Thalassiosira punctigera are the most common examples of non-indigenous phytoplankton species in the European Seas. Ehrenberg, 1839. Coscinodiscus excentricus.jpeg 800 × 600; 63 KB. UniParc. b. identification of your specimen using the Plankton Identification Chart 6. A semi motorized vertical fluorescence microscope was used, observing the samples in the objectives with magnifications of 10× and 40×. Please contact Kim Stark if you would like to use an image without a watermark. Change History. Other species of Coscinodiscus and Thalassiosira. 1.jpg 370 × 335; 50 KB. Provided below is the updated checklist which was published by Stoermer, Kreis and Andresen (1999) in the Journal of Great Lakes Research 25(3):515-566. Identification guides, original descriptions, citations, autecological information and more for 1002 species and growing. Specimen Records: 6: Public Records: 1: Specimens with Sequences: 1: Public Species: 1: Specimens with Barcodes: 0: Public BINs: 0: Species: 1 Species With Barcodes: Protein knowledgebase. Coscinodiscus species Coscinodiscus concinnus Name Synonyms Coscinodiscus radiatus var. Cleve. and there were no distinct markings on the outer covering. DOI: 10.1515/botm.1975.18.1.29 Corpus ID: 84228005. Species reference . Xiaoguang Zhao, ... Email or Customer ID. The Christina River is part of a a tidal tributary to the Delaware River and includes freshwater and marine diatom species. # Coscinodiscus marginatus Ehrenberg, Coscinodiscus radiatus Ehrenberg, and Coscinodiscus oculus-iridis Ehrenberg are ... reliable for identification. Media in category " Coscinodiscus ". Tomas, C. A taxonomic analysis of diatoms found on Phyllodictyon pulcherrimum yielded a total of 244 diatom taxa (all illustrated) within 27 orders, 45 families, and 86 genera. Referensi. Not all phytoplankton collected can be identified with this sheet. Repeat this procedure with as many different organisms as time permits. Coscinodiscus cf. Taxonomic Description: P. micans is a bivalvate species often observed in valve view. or Sketonema sp. The following 11 files are in this category, out of 11 total. Cylinder shape approximation was performed in two different ways (Table I). One of the most prolific marine species 400 â 500 taxa have been identified. Other species of Coscinodiscus and Thalassiosira. C. granii can be easily identified in girdle view due to its wedged shape. In valve view, this species can still be diagnosed as only one side of the valve would be in focus (Hasle and Syvertsen 1997). Coscinodiscus gigas.jpeg 800 × 600; 59 KB. Genera Brightwellia Coscinodiscus Craspedodiscus Palmeria Palmerina Stellarima. They inhabit the illuminated upper 200 meters of most oceans and help form the base of the food chain using photosynthesis to convert solar ⦠In valve view, this species can still be diagnosed as only one side of the valve would be in focus (Hasle and Syvertsen 1997). Smith. Coscinodiscaceae adalah keluarga diatom dalam ordo Coscinodiscales Halaman ini terakhir diubah pada 30 Januari 2017, pukul 16.34. Strain Specific FAQs: Q: We received the Diatom starter cultures yesterday. The type species (lectotype) of the genus Coscinodiscus is Coscinodiscus argus Ehrenberg. Presence of many small chloroplasts. 1 MPA-2013 Coscinodiscus sp. Information on specific Coscinodiscus species is noted where given, and all other information should be read as general to the genus but not specific to any Coscinodiscus species. Coscinodiscus are a genus of diatoms. Diatoms are unicellular, photosynthetic phytoplankton whose bodies are made up of silica, or glass. Genus ini adalah tipe genus dari keluarganya. 51: 685-695. 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