Tectaria zeilanica, the oak leaf fern, is a species of fern in the family Tectariaceae. It is native to Sri Lanka, India, and the Indochina region in southern China and Vietnam, and Taiwan. It is a small fern, with erect fertile fronds, and sterile fronds shaped like small oak leaves. The name is often erroneously spelled 'zeylanica', but it was originally published as 'zeilanica', and this is not a correctable error under the International Code of Nomenclature for algae, fungi, and plants.
No narrative description available for this taxon yet.
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 Tectaria zeilanica has left across the world's sequence archives.
At a glance
Marker genes2
GenBank sequences10
eDNA detections6
Countries3
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.
★matK5★rbcL5
plant barcode
08Occurrence & distribution
Record type171 records
Wild obs. + sensor132
Museum / vouchered39
Origin
Native7
Range
Area of Occupancy AOO448 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 accuracy76% within 1 km
≤100 m 53≤1 km 15≤10 km 7>10 km 14
89 georeferenced · 43 without coordinates
Open the mapobservation + sensor132
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 accuracy40% within 1 km
≤1 km 2≤10 km 1>10 km 2
5 georeferenced · 34 without coordinates
Open the institutions mapphysical evidence39
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 institutions9 of 11 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Taipei, TW
8
Saint Louis, US
8
TAIElocation not on record
7
Auckland, NZ
4
Paris, FR
2
Bronx, US
2
Taipei, TW
1
Edinburgh, GB
1
Taipei, TW
1
South Kensington, GB
1
University of Stellenboschlocation not on record
1
11 institutions · 36 of 39 vouchered records shown · 1 without an institution code
09Environmental DNA6 detections
Where the DNA of Tectaria zeilanica 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 found6
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 6 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 median10.0 °C 10.0–10.0
Seasonal swing summer↔winter31.5 °C
Max temp (day)15.7 °C
Min temp (night)3.10 °C
Precipitation13.8 mm/mo
Air humidity45.7 %
Moisture balance-95.2 mm/mo
Vapour deficit827 Pa
Wind speed4.50 m/s
Cloud cover24.1 %
CHELSA 1981–2010, ~9 km grid, at location & month of 3 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.
