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Classification by similarity of DNA
and Peter H. A. Sneath in the context of numerical taxonomy, where an "operational taxonomic unit" is simply the group of organisms currently being studied
Operational_taxonomic_unit
Single DNA sequences obtained from a high-throughput analysis of marker genes
Before that, for many years the standard unit for marker-gene analysis was the operational taxonomic unit (OTU), which is generated by clustering sequences
Amplicon_sequence_variant
Topics referred to by the same term
from the 2016 Video Game Owlboy from D-Pad Studio Operational taxonomic unit, operational taxonomic units in biology Erol Otus (21st century), American artist
Otus
MWAS can be assessed using a specific taxonomic level (species, genus, phyla, etc.), operational taxonomic unit (OTU) or amplicon sequence variant (ASV)
Microbiome-wide association study
Microbiome-wide_association_study
Development of classes and classifications
such work. Thus a taxonomy can be used to organize species, documents, videos or anything else. A taxonomy organizes taxonomic units known as "taxa" (singular
Taxonomy
Hierarchical level in biological classification
In biological taxonomy, a taxonomic rank denotes the level that a group of organisms—either taxon or clade—occupies in a hierarchical system of classification
Taxonomic_rank
Classification of blood types
Bacteroides and Faecalibacterium spp. Bacteroides of the same OTU (operational taxonomic unit) have been shown to be associated with inflammatory bowel disease
ABO_blood_group_system
Method of species identification using a short section of DNA
matches as taxonomic "anchors". The sequence may be assigned to a particular operational taxonomic unit (OTU) that, if combined with other taxonomic methods
DNA_barcoding
Attempt to classify organisms based on overall similarity
matrices in phylogeny Folk taxonomy Form classification Linnaean taxonomy Phenomics Taxonomy Dendrogram Operational taxonomic unit Sneath, P. H. A. & R. R
Phenetics
Topics referred to by the same term
in Ontario, Canada Operational taxonomic unit, in biology Operational Training Unit (Royal Air Force) Optical channel Transport Unit, a layer of the Optical
Otu
Rhea
publicly available through a GitHub repository. Starting with an Operational taxonomic unit (OTU) table, the pipeline contains scripts that perform the following
Rhea_(pipeline)
Bioinformatics software package
one or more samples. In essence, PICRUSt takes a user supplied operational taxonomic unit table (typically referred to as an OTU table), representing the
PICRUSt
Genetic technique for identifying organisms in mixed samples
reference databases from Sanger‐sequenced DNA. (The molecular operational taxonomic unit (MOTU) is a group identified through use of cluster algorithms
Metabarcoding
Genus of theropod dinosaur
relationships of therizinosaurs. This dataset synthesized characters and operational taxonomic units (OTUs) from the previous work by Zanno (2010), Senter et al.
Kayrasaurus
Specimen(s) chosen to represent a newly described taxon
individuals or taxa, but rather fix a scientific name to a specific operational taxonomic unit. Type specimens are theoretically even allowed to be aberrant
Type_(biology)
DNA sampled from the environment rather than directly from an individual organism
tropical environments where traditional data is often limited. OTU (operational taxonomic unit) network of the extracellular DNA pools from the sediments of
Environmental_DNA
Measure of biodiversity
described as the average number of distinct taxonomic groups (e.g. unique genera or operational taxonomic unit) present, independent of their abundances
Zeta_diversity
File format used in bioinformatics
Block Name Description TAXA Specifies the OTUs (operational taxonomic units) in data set CHARACTERS Specifies the character data (e.g., homologous morphological
Nexus_file
Substrings of length k contained in a biological sequence
separate sequencing reads into "bins" of reads for each organism (or operational taxonomic unit), which will then be assembled. TETRA is a notable tool that takes
K-mer
Extinct genus of dinosaurs
on PIN 3142/250, the characters of which usually defined the operational taxonomic unit named Tarchia in the various cladistic analyses. Remarkably, Tarchia
Tarchia
"Distribution-Based Clustering: Using Ecology To Refine the Operational Taxonomic Unit". Applied and Environmental Microbiology. 79 (21): 6593–6603.
Oligotyping_(sequencing)
Extinct genus of dinosaurs
often close to Tarchia, which is not surprising given that the Operational Taxonomic Unit of the latter was typically based on specimen PIN 3142/250, now
Saichania
diagram, combines information about the succession of different operational taxonomic units (OTUs)—such as genotypes, phenotypes, or species—and information
Muller_plot
Genus of ornithopod dinosaurs
Madzia included the 'Quarante rhabdodontomorph' as a separate operational taxonomic unit (OTU); the specimens comprising this OTU were referred to cf.
Obelignathus
Glands found near the anus in many mammals
communication, much like the AGS. Subcaudal glands of badgers had 56 operational taxonomic units (OTU) used to classify the different bacteria found into four
Anal_gland
RNA component
rRNA gene reference database and taxonomy based on a de novo phylogeny that provides standard operational taxonomic unit sets. In 2023, GreenGenes2 was
16S_ribosomal_RNA
Form of biological classification
molecular Operational Taxonomic Units (mOTUs). However, over-reliance on genetic splitting without ecological context can lead to "taxonomic inflation
Evolutionary_taxonomy
Taxon that has been discovered but not yet formally described and named
potential undescribed species through DNA analysis. Molecular Operational Taxonomic Units (MOTUs) are groups of organisms distinguished by DNA sequence
Undescribed_taxon
Study of genes found in the environment
each representing a species-like collection of organisms (see: operational taxonomic unit), to the best ability of the binning tool. Each bin consists of
Metagenomics
Marine invertebrates of the subphylum Anthozoa
studies of soft coral species have faced challenges due to a lack of taxonomic knowledge. Researchers have not found enough variability within the genus
Coral
Genus of somphospondylan sauropod dinosaurs
basal somphospondylans. Removing Jiangxititan as an unstable operational taxonomic unit in their analyses allowed for increased resolution, with more
Jiangxititan
Genus of archaea
oxygen, but recent studies have shown at least one Candidatus operational taxonomic unit proposed to be in the Methanothrix genus not only survives but
Methanothrix
Extinct genus of freshwater dolphins
et al. (2018). The two specimens were combined into a single operational taxonomic unit representative of the species for the analysis rather than being
Eolipotes
Monospecific genus of predatory algae
within the Mediterranean Sea. These sequences, named Rapaza-like operational taxonomic unit (OTUs), were more abundant in waters with high temperatures (20–30°C)
Rapaza
Genus of extinct archosauriform
Halazhaisuchus with "Turfanosuchus" shageduensis as a single operational taxonomic unit (OTU), are displayed in the cladogram below. Silescelida was recovered
Silescelida
Extinct genus of theropod dinosaurs
their phylogenetic tree, the combined Sinotyrannus+Huaxiagnathus operational taxonomic unit (OTU) was recovered as the sister taxon to Eotyrannus in a clade
Sinotyrannus
Microorganisms in or on human skin and biofluids
this phenomenon, the first approach is to cluster sequences into Operational taxonomic unit (OTUs): this process consolidates similar sequences (a 97% similarity
Human_microbiome
Genus of moths
circumscription of these new species. DNA barcode data for altogether 25 operational taxonomic units or BINs (Barcode Index Numbers) of Conogethes are stored in the
Conogethes
Group of single-celled organisms
forest and grassland soils. They also comprise 9-24% of all operational taxonomic units found in the ocean floor. Some cercozoa are coprophilic or coprozoic
Cercozoa
used to refer to the study of an organism's entire lifespan. operational taxonomic unit (OTU) orphan gene A gene for which there are no known functional
Glossary of genetics and evolutionary biology
Glossary_of_genetics_and_evolutionary_biology
Genus of extinct stem-reptile
et al. (2025), in which SAM-PK-K7710 was treated as a separate operational taxonomic unit (OTU) from Akkedops. These results placed these two as sister
Scyllacerta
Ankylosaurian dinosaur species from early Cretaceous Period
ankylosaurid. Arbour & Currie entered Minmi and Minmi sp. as separate operational taxonomic units in their analysis and recovered Minmi as the basalmost ankylosaurid
Minmi_paravertebra
NATO standard for military map marking symbols
etc. Tactical graphics represent operational information that cannot be presented via icon-based symbols alone: unit boundaries, special area designations
NATO_Joint_Military_Symbology
with mtDNA. This cytonuclear discordance involves at least four operational taxonomic units (OTUs) across four species. Another example among insects is
Cytonuclear_discordance
Species of plant endemic to Japan
nepalensis, form mycohrrhizal associations exclusively with operational taxonomic units (OTUs) belonging to the family Glomeraceae. The primary mycobionts
Oxygyne_hyodoi
Species of bacterium
hypersaline lakes, and other sulfidic habitats. There have been 226 operational taxonomic unit (OTU) samples collected and 46.5% of the samples have come from
Thiomicrorhabdus_arctica
different restriction site is considered to represent a single operational taxonomic unit [OTU]). Thus, the enzyme will produce one fragment length for
Community_fingerprinting
Culture Collection
sequencing presents difficulty as each spore can yield many Operational Taxonomic Units (OTUs). In addition to overcoming the challenges presented by
International Collection of (Vesicular) Arbuscular Mycorrhizal Fungi
International_Collection_of_(Vesicular)_Arbuscular_Mycorrhizal_Fungi
Zhan et al. (2020), using DNA barcoding, found 13 different operational taxonomic units of red algae growing within freshwater aquarium stores in Taiwan
Freshwater_aquarium_algae
Genus of carcharodontosaurid dinosaurs
Acrocanthosaurus. The results of their analysis using merged OTUs (operational taxonomic units) is displayed in the cladogram below: In a 2025 analysis of large
Tameryraptor
Section of plants
methods (ASAP, PTP and mPTP) to propose 28 consensus molecular operational taxonomic units (c‑MOTUs). Ten morphospecies were suggested to be species complexes
Camellia_sect._Thea
Genus of carcharodontosaurid dinosaur from the Cretaceous period
Carcharodontosauriformes. The results of their analysis using merged OTUs (operational taxonomic units; a group of organisms under phylogenetic study) are displayed
Carcharodontosaurus
Study of lichen taxonomy and evolution
microbial taxa; for instance, more than 800 distinct bacterial operational taxonomic units (OTUs) were recorded from the common foliose lichen Lobaria pulmonaria
Lichen_systematics
genetic material using two genetic markers to identify species and operational taxonomic units (OTUs). Overall, fish represented the most frequently detected
Wildlife conservation technology
Wildlife_conservation_technology
Genus of algae
dissimilarity in the composition of the Leptocylindrus microbiome (at the Operational Taxonomic Unit level (OTU)) between Leptocylindrus strains from differing locations
Leptocylindrus
Class of bacteria
better interpret Fe biominerals found in the rock record. An operational taxonomic unit, or an OTU, allows a microbiologist to define a bacterial taxa
Zetaproteobacteria
Method of biological systematics in evolutionary biology
morphological, ethological and/or other characters and a list of operational taxonomic units (OTUs), which may be genes, individuals, populations, species
Cladistics
Extinct genus of dinosaurs
analysis, adding the holotype, pes, and dentary as separate operational taxonomic units (OTUs). All three claded together at the base of the Neornithischia
Minimocursor
Species of crustacean
lineages. Recent analyses identified 13 well-supported molecular operational taxonomic units (MOTUs), indicating numerous locally endemic lineages across
Gammarus_roeseli
Genus of extinct animals
the phylogenetic analysis both specimens were combined as one operational taxonomic unit and inserted into a character-taxon matrix based on that of Pol
Antaeusuchus
Sea water particles that are formed directly from the ocean
than others. Sea spray from one beach can contain thousands of operational taxonomic units (OTUs). Nearly 10,000 different OTUs have been discovered in
Sea_spray
Extinct genus of dinosaurs
e.a. had entered QM F1801 and the Minmi holotype as separate operational taxonomic units in their analysis. Whereas Minmi was recovered as a basal member
Kunbarrasaurus
Community of microorganisms
through clustering methodologies, by clustering the amplicons into operational taxonomic units (OTUs); or alternatively with denoising methodologies, identifying
Microbiota
grouped according to the degree of similarity, to define OTUS (Operational Taxonomic Units)-which are groups of sequences that belong to organisms phylogenetically
Fibrolytic_bacterium
Genus of extinct early sauropsids
the A. bremneri holotype and SAM-PK-K7710 as separate OTUs (operational taxonomic units). Their results supported the placement of these two specimens
Akkedops
Extinct genus of early reptiles
unconstrained maximum parsimony analyses, removing fragmentary operational taxonomic units (OTUs) each time to improve resolution and better observe the
Galesphyrus
Extinct genus of dinosaurs
224–257. ISBN 978-0-8018-6763-7. Rauhut, Oliver W.M. (2003). "Operational Taxonomic Units". The Interrelationships and Evolution of Basal Theropod Dinosaurs
Ornitholestes
Extinct clade of dinosaurs
unnamed specimens), which they scored 700 characters and 501 operational taxonomic units, found that most of the anchiornithids are members of Archaeopterygidae
Deinonychosauria
Extinct family of dinosaurs
unnamed specimens), which they scored 700 characters and 501 operational taxonomic units, found that most of the anchiornithids are members of Archaeopterygidae
Anchiornithidae
Genus of soil amoebae
soil samples, environmental DNA studies recover twice as many operational taxonomic units assigned to centrohelids in soil compared to freshwater biotopes
Triangulopteris
Species of green alga
gigantea constitute a complex clade encompassing 34 distinct operational taxonomic units (OTUs). This finding suggests that what is currently known as
Trebouxia_arboricola
Genus of bacteria
can then be further divided into various accession numbers or operational taxonomical units (OTUs) due to slight differences in sequence. P. excrementihominis
Parasutterella
Rare species of bacteria
divides unique rRNA gene (or other target gene) tag sequences into operational taxonomic units (OTUs) based upon similarities in the DNA code of the sequenced
Rare_biosphere
Assembly of microorganisms near plants
one million distinct bacterial genomes, and over 50,000 OTUs (operational taxonomic units) have been found within the potato rhizosphere. Among the prokaryotes
Plant_microbiome
Software for understanding biological data
distance (the sum of the lengths of all branches connecting two operational taxonomic units [OTU]) to select k-neighborhoods for each OTU, and each OTU and
Machine_learning_in_biology
Marine consumer-resource system
different between the two poles. For example, 78% of bacterial operational taxonomic units (OTUs) of surface water communities of the Southern Ocean and
Marine_food_web
Taxon that does not appear to produce any observable morphological structure
the number of undescribed species in a taxonomic group by calculating the proportion of operational taxonomic units (OTUs) for which there is an associated
Dark_taxon
Subdiscipline of ecology
primary areas of concern are methods for clustering sequences into operational taxonomic units by sequence similarity and quality control of sequence data.
Molecular_ecology
Clade of lizards
morphological characters and 46 molecular characters across 210 operational taxonomic units, is as shown, focusing on Anguimorpha: Tadahiro Ikeda, Hidetoshi
Monstersauria
Marine flowering plants
associated with rhizosphere taxa in which fungal and archaeal OTUs (operational taxonomic units) also have representation. The microbial community in the Posidonia
Seagrass
Extinct genus of dinosaurs
second specimen potentially referrable to this genus as separate operational taxonomic units (OTUs) in a phylogenetic analysis. These results recovered both
Sauroniops
Distance metric used for comparing biological communities
of thousands, and it is appropriate to 'bin' these reads into operational taxonomic units, or OTUs, which can then be dealt with as taxa within the UniFrac
UniFrac
Extinct genus of theropod dinosaurs
match those of the postorbital) and referred maxilla as separate operational taxonomic units (OTUs) to test the likelihood that they belonged to the same
Eocarcharia
Species of fish
natural hybridization and delimitation of two closely related operational taxonomic units of the Astyanax fasciatus (Teleostei: Characidae) complex through
Astyanax_aramburui
and species, as evidenced from the specificity of different operational taxonomic units (OTUs) in various tissues of plants within the same genus. The
Plant_holobiont
Classification of computer architectures
Flynn's taxonomy as a root class for processor array and associative memory subclasses. SIMD architectures are characterized by having a control unit broadcast
Duncan's_taxonomy
Plant surfaces as habitats for microorganisms
{A} The heatmap on the left illustrates how the composition of operational taxonomic units (OTUs) in the manuka phyllosphere and associated soil communities
Phyllosphere
Long-term oceanographic study by the Bermuda Institute of Ocean Sciences
the Sargasso Sea has been characterized. Some of the detected operational taxonomic units (OTUs) are consistent regardless of depth or time, whereas others
Bermuda Atlantic Time-series Study
Bermuda_Atlantic_Time-series_Study
Identification of fungal species thanks to specific DNA sequences
intraspecific variation – will therefore lead to a higher estimate of operational taxonomic units (OTUs), i.e., putative species, than there actually are in a
Fungal_DNA_barcoding
Aspect of DNA testing
organisms, 16S marker can be used for determining individual operational taxonomic units (OTUs). In some cases, these OTUs can also be linked to traditionally
Microbial_DNA_barcoding
Community of microorganisms in human milk
colony-forming units (CFU) per milliliter. The milk's bacterial communities were generally complex. Among the hundreds of operational taxonomic units detected
Human_milk_microbiome
in part Frequently used in taxonomy to refer to part of a group. pro patria for country Pro Patria Medal: for operational service (minimum 55 days) in
List_of_Latin_phrases_(full)
Country primarily in North America
ISBN 978-0-312-37659-8. Tinkham, Ernest R. (March 1944). "Biological, Taxonomic and Faunistic Studies on the Shield-Back Katydids of the North American
United_States
U.S. military individual field ration
go. The Modular Operational Rations Enhancement (MORE) is issued as a supplement to meals for troops in extreme, demanding operational environments such
Meal,_Ready-to-Eat
Integration of software development and operations
Recovery Time (formerly Mean Time to Recover) Reliability: Measures operational performance by focusing on availability and adherence to user expectations
DevOps
Type of parallel processing
central processing unit (CPU) designs include SIMD instructions to improve the performance of multimedia use. In recent CPUs, SIMD units are tightly coupled
Single instruction, multiple data
Single_instruction,_multiple_data
Eukaryotes other than animals, plants or fungi
protists that accounts for the majority of eukaryotic sequences or operational taxonomic units (OTUs), dwarfing those from land plants, animals and fungi. As
Protist
Protecting economic value by managing risk exposure
more specific variants as listed aside - as well as some aspects of operational risk. As for risk management more generally, financial risk management
Financial_risk_management
U.S. Army's branch for military intelligence
synchronized intelligence and electronic warfare support to tactical, operational and strategic-level commanders. The Army's intelligence components produce
Military Intelligence Corps (United States Army)
Military_Intelligence_Corps_(United_States_Army)
Information about military opponents
tactical units or task forces".[citation needed] Intelligence should respond to the needs of leadership, based on the military objective and operational plans
Military_intelligence
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OPERATIONAL TAXONOMIC-UNIT
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