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 Symplocos pendula has left across the world's sequence archives.
At a glance
eDNA detections4
Countries1
07Deep time~6.78 Ma lineage
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 origin6.78 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 type46 records
Museum / vouchered46
Range
Area of Occupancy AOO104 km²
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 accuracy
no georeferenced coordinates · 46 records without
Open the institutions mapphysical evidence46
10Collections & institutions
Holding institutions6 of 9 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Changsha, CN
12
Kew, GB
11
Honolulu, US
3
South Kensington, GB
3
University of Stellenboschlocation not on record
1
Taipei, TW
1
EL PASO, US
1
CASlocation not on record
1
Moscow State Universitylocation not on record
1
9 institutions · 34 of 46 vouchered records shown · 12 without an institution code
09Environmental DNA4 detections
Where the DNA of Symplocos pendula 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 found4
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 4 detections have coordinates
Open the map1 country0
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 median24.4 °C 24.4–24.4
Seasonal swing summer↔winter17.4 °C
Max temp (day)28.6 °C
Min temp (night)19.2 °C
Precipitation213 mm/mo
Air humidity63.4 %
Moisture balance44.3 mm/mo
Vapour deficit1,116 Pa
Wind speed4.00 m/s
Cloud cover50.9 %
CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · 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.
