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 Quercus urbani has left across the world's sequence archives.
At a glance
eDNA detections1
08Occurrence & distribution
Record type255 records
Wild obs. + sensor10
Museum / vouchered245
Range
Area of Occupancy AOO688 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 accuracy67% within 1 km
≤100 m 3≤1 km 1≤10 km 2
6 georeferenced · 4 without coordinates
Open the mapobservation + sensor10
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 accuracy93% within 1 km
≤100 m 168≤10 km 13
181 georeferenced · 64 without coordinates
Open the institutions mapphysical evidence245
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 institutions21 of 25 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Mexico City, MX
53
Mexico City, MX
47
Guasave, MX
34
Ciudad de México, MX
27
Durango, MX
21
Durango, US
16
Mexico City, MX
7
Tlalnepantla, MX
6
Austin, US
6
Giardini Botanici Hanburylocation not on record
4
Riverside, US
4
Saint Louis, US
3
Museum of the Rockieslocation not on record
2
Culiacán, MX
2
MEXUlocation not on record
2
Paris, FR
2
Toluca, MX
1
San Francisco, US
1
EL PASO, US
1
Lubbock, US
1
South Kensington, GB
1
GB
1
La Paz, MX
1
ASUlocation not on record
1
Morelia, MX
1
25 institutions · 245 of 245 vouchered records shown
09Environmental DNA1 detections
Where the DNA of Quercus urbani 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 found1
Studies independent surveys1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 1 detections have coordinates
Open the map0 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.
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.
