A DNA barcode is a short, standardised stretch of genes that works like a fingerprint — enough to tell one species from another. Below is the molecular trace Danthonia compressa has left across the world's sequence archives.
At a glance
DNA specimens5
Marker genes5
GenBank sequences6
eDNA detections5
Countries2
The DNA barcodea real sequence read deposited for this species
★ the standard DNA barcode for this group — the short region actually read to tell this species apart. The rest are extra genes sequenced along the way.
★matK1★rbcL4★rbcLa★ITS1★ITS2
plant barcodefungal barcode
06Genome at a glanceCCDB
The complete instruction manualDanthonia compressa carries — its genome. We read it from three angles — how big it is, how the DNA is packed into chromosomes, and how completely it has been sequenced — and explain how to read each value as you go.
Chromosomes & ploidyhow the DNA is packaged
2n is the full chromosome count in a normal body cell; n is a gamete (egg or sperm), which carries half. Ploidy is how many complete chromosome sets each cell holds — 2× (diploid) is typical for animals, while higher levels (polyploidy) are common in plants. Click any value below to see the underlying records and sources.
How far back this lineage goes — and how we know. Everything here is measured in Ma, short for “mega-annum”: millions of years ago. The chart reads left to right like a calendar of the Earth, from the deep past on the left to today at the right edgetop to bottom like a core drilled through the Earth, from the deep past at the top down to today at the bottom.
At a glance
DNA clock origin3.4 Ma TimeTree
When this lineage existed
How to read this: the coloured strip along the bottomdown the left is the geological calendar — the standard epochs (Pliocene, Pleistocene…) every museum uses, shown so you can see which chapter of Earth's history this lineage lived in. This lineage is a young one, so the strip is zoomed in to epochs — the finer subdivisions inside a period. The orange marker is the DNA clock: DNA accumulates mutations at a roughly steady rate, so comparing this species' DNA with its relatives estimates when the lineage split off — independently of any fossil.
DNA clock origin
08Occurrence & distribution
Record type1 129 records
Wild obs. + sensor257
Museum / vouchered872
Range
Area of Occupancy AOO3 704 km²
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy86% within 1 km
≤100 m 147≤1 km 16≤10 km 3>10 km 23
189 georeferenced · 68 without coordinates
Open the mapobservation + sensor257
Museum / Voucheredphysical evidence
Backed by a physical specimen — a herbarium sheet, sample or voucher held in a collection. “Vouchered” means supported by material evidence, not just an observation.
Coordinate accuracy27% within 1 km
≤100 m 40≤1 km 107≤10 km 359>10 km 43
549 georeferenced · 323 without coordinates
Open the institutions mapphysical evidence872
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
10Collections & institutions
Holding institutions52 of 77 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Chongqing Museumlocation not on record
146
Philadelphia, US
113
Bronx, US
60
Burlington, US
47
University of New Hampshirelocation not on record
41
Ann Arbor, US
35
New Haven, US
31
Acadia Universitylocation not on record
28
Western Carolina Universitylocation not on record
17
Bangkok, TH
15
Bloomington, US
14
University of Stellenboschlocation not on record
14
Williamsburg, US
13
Morgantown, US
12
Chapel Hill, US
11
Tampa, US
11
Philadelphia, US
11
Québec, CA
11
Université Lavallocation not on record
10
Johnson City, US
9
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
8
Saint John, CA
7
Allentown, US
7
Clemson, US
6
Saint Louis, US
6
College Park, US
6
Durham, US
5
Logan, US
5
Madison, US
5
Riverside, US
5
Montréal, CA
4
Knoxville, US
4
Millersville, US
3
Keene State Universitylocation not on record
3
Dover, US
3
Columbia, US
3
Lord Fairfax Community Collegelocation not on record
3
Dekalb, US
3
University of Tennessee at Chattanoogalocation not on record
3
Zürich, CH
2
Norfolk, US
2
Wuzhou, CN
2
Black Rock Forest Consortiumlocation not on record
2
Staten Island, US
2
Kew, GB
2
Mohonk Preservelocation not on record
2
University of Guelph, OAC Herbariumlocation not on record
2
St. Paul, US
2
Maryland Department of Natural Resourceslocation not on record
2
Moscow, US
2
North Carolina Museum of Natural Scienceslocation not on record
1
Tempe, US
1
Trois-Rivières, CA
1
Wlocation not on record
1
Provo, US
1
Auckland, NZ
1
Victoria, CA
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
GB
1
Museum of the Rockieslocation not on record
1
Lubbock, US
1
Whitehorse, CA
1
University of South Carolina Salkehatchielocation not on record
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
McGill University, Herbariumlocation not on record
1
McWane Science Centerlocation not on record
1
Tuscaloosa, US
1
Oswego, US
1
ASUlocation not on record
1
University of Southern Mississippilocation not on record
1
Fairfax, US
1
Claremont, US
1
Boise, US
1
West Virginia Wesleyan Collegelocation not on record
1
Toronto, CA
1
Elikins, US
1
Hamilton, US
1
77 institutions · 787 of 872 vouchered records shown · 84 without an institution code
09Environmental DNA5 detections
Where the DNA of Danthonia compressa was picked up in samples of water, soil or air — nobody saw the organism, only its DNA left behind. A trace is a clue that the species was near, not a confirmed sighting.
Signal
Detections DNA found5
Studies independent surveys1
Countries2
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map2 countries0
How strong is each trace?
DNA read depthRead counts were not reported for this species — the map shows presence only, not how strong each trace was.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median12.5 °C -1.10–17.6
Seasonal swing summer↔winter27.0 °C
Max temp (day)18.4 °C 2.70–22.6
Min temp (night)8.20 °C -3.80–13.2
Precipitation92.5 mm/mo 79.6–143
Air humidity58.8 % 57.3–64.3
Moisture balance-38.4 mm/mo -44.7–115
Vapour deficit733 Pa 205–909
Wind speed3.50 m/s 3.20–5.80
Cloud cover47.5 % 36.7–57.8
CHELSA 1981–2010, ~9 km grid, at location & month of 5 detection points · median with p10–p90 · reflects where sampling happened, not only the true niche
How to read this: each dot is one detection of this species' DNA in an environmental sample. The confidence meter weighs how many independent studies and places back up the signal — one detection in one study is a hint; many across several studies is solid. Records dated before 2008 (when eDNA methods began) are treated as likely mislabeled and left off the map.
WikipediaWikimedia Foundation3 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 129 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI5 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics5 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗