Verrucaria nigrescens is a widespread species of crustose lichen in the family Verrucariaceae. It was first formally described as a new species by Christiaan Hendrik Persoon in 1795. The lichen produces a very dark brown thallus that grows on rocks; the medulla is black. There are black perithecia that resemble buried dots, and which measure 0.15–0.3 mm in diameter. Ascospores measure 14–24 by 7–11 μm.
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 Verrucaria nigrescens has left across the world's sequence archives.
At a glance
DNA specimens5
Marker genes2
eDNA detections5
Countries2
Marker genes sequenced
★ 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.
★ITS★ITS1
fungal barcode
08Occurrence & distribution
Record type25 957 records
Wild obs. + sensor23 789
Museum / vouchered2 026
Cultivated / captive79
Other63
Origin
Native1 256
Range
Area of Occupancy AOO58 880 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 accuracy63% within 1 km
≤100 m 11 650≤1 km 3 085≤10 km 8 678>10 km 15
23 428 georeferenced · 361 without coordinates
Open the mapobservation + sensor23 789
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 accuracy30% within 1 km
≤100 m 123≤1 km 172≤10 km 625>10 km 70
990 georeferenced · 1 036 without coordinates
Open the institutions mapphysical evidence2 026
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Coordinate accuracy
no georeferenced coordinates · 79 records without
Open the mapnot free-living79
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 institutions45 of 91 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Uniwersytet Wrocławskilocation not on record
197
BDBClocation not on record
189
Philadelphia, US
178
Uppsala, SE
151
Madison, US
85
LDlocation not on record
74
Berlin, DE
69
Museo Achille Folettolocation not on record
58
Madrid, ES
40
Durham, US
37
Olocation not on record
35
Wuzhou, CN
35
Chicago, US
34
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
33
St. Paul, US
29
Senckenberg Gesellschaft für Naturforschung: Senckenberg Forschungsinstitut und Naturmuseumlocation not on record
26
BClocation not on record
25
ASUlocation not on record
24
Barcelona, ES
23
University of Gdansklocation not on record
23
US
22
Helsinki, FI
22
Polar-Alpine Botanical Garden-Institutelocation not on record
20
MAlocation not on record
20
Bergen, NO
17
Museo Entomologico de Leonlocation not on record
15
Oregon State Universitylocation not on record
15
MeiseBGlocation not on record
15
DOI/NPS, Colonial National Historical Parklocation not on record
13
CJBGlocation not on record
12
Canberra, AU
12
Staatsarchiv Urilocation not on record
12
Museum of the Rockieslocation not on record
11
Bronx, US
11
Entomological Society of Latvialocation not on record
10
Minia, EG
10
València, ES
10
South Kensington, GB
10
UFMSlocation not on record
9
Salzburg, AT
9
Hobart, AU
8
Stockholm, SE
7
Mlocation not on record
7
Tallinn, EE
7
University of Stellenboschlocation not on record
6
Ann Arbor, US
6
Natural History and Science Museum of the University of PO-Lrto (MHNC-UP)location not on record
6
Museum Ludovicae Ulricae, Zoology Institute of the University of Uppsalalocation not on record
6
GZUlocation not on record
6
PRClocation not on record
5
Vitoria, ES
5
Museo civico di Storia naturale Giacomo Doria di Genova | Giacomo Doria Natural History Museum in Genoalocation not on record
4
4
WTUlocation not on record
4
M-Lichenslocation not on record
4
San Luis Obispo, US
4
SLU Artdatabankenlocation not on record
4
Lincoln, US
3
Klostermuseum Disentislocation not on record
3
Metsähallituslocation not on record
3
New Haven, US
3
Bozeman, US
3
ILLSlocation not on record
3
PHlocation not on record
2
FLASlocation not on record
2
Institute of the Industrial Ecology Problems of the North of Kola Science Center of the Russian Academy of Sciences.location not on record
2
Santa Barbara, US
2
Chapel Hill, US
2
Trondheim, NO
2
Kew, GB
2
McWane Science Centerlocation not on record
2
European Distributed Institute of Taxonomy (EDIT)location not on record
1
Göteborg, SE
1
Bourges, FR
1
Université Lavallocation not on record
1
Toronto, CA
1
Repubblica di San Marinolocation not on record
1
Karelian Research Centre, Russian Academy of Scienceslocation not on record
1
Champaign, US
1
Burlington, US
1
nbflocation not on record
1
BG-NMNHSlocation not on record
1
San Sebastián, ES
1
Gijón, ES
1
Logan, US
1
Institut und Museum fuer Geologie und Palaeontologielocation not on record
1
Barcelona, ES
1
Masindi, UG
1
WU-MYClocation not on record
1
Cambridge, US
1
Frauenfeld, CH
1
91 institutions · 1 787 of 2 026 vouchered records shown · 238 without an institution code
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
09Environmental DNA5 detections
Where the DNA of Verrucaria nigrescens 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
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 5 detections have coordinates
Open the map1 country0
on siliceous stone in vertical mortared wall…
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 median5.50 °C 5.50–5.50
Seasonal swing summer↔winter10.0 °C
Max temp (day)8.00 °C
Min temp (night)2.80 °C
Precipitation75.0 mm/mo
Air humidity64.9 %
Moisture balance34.0 mm/mo
Vapour deficit317 Pa
Wind speed6.50 m/s
Cloud cover54.7 %
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.
