Pellaea truncata is a species of fern known by the common name spiny cliffbrake. It is native to the southwestern United States and northern Mexico, where it grows in rocky areas, such as cliffs and slopes.
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 Pellaea truncata has left across the world's sequence archives.
At a glance
DNA specimens3
Marker genes2
GenBank sequences5
eDNA detections3
Countries1
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.
★rbcL5★rbcLa
plant barcode
06Genome at a glanceCCDB
The complete instruction manualPellaea truncata 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.
Chromosomes2n = 58 n = 29
Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references
2n 581×CCDB · eflora
CCDB · eflora
n 291×CCDB · ipcn-api-dl
CCDB · ipcn-api-dl — Windham, M. D. 1986. In: C. H. Haufler & D. E. Soltis, Genetic evidence suggests that homosporous ferns with high chromosome numbers are diploid. Proc. Natl. Acad. Sci. U.S.A. 83: 4389–4393.
07Deep time~0.9 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 origin0.9 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 type2 485 records
Wild obs. + sensor1 664
Museum / vouchered821
Origin
Native25
Range
Area of Occupancy AOO4 536 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 accuracy90% within 1 km
≤100 m 976≤1 km 153≤10 km 44>10 km 83
1 256 georeferenced · 408 without coordinates
Open the mapobservation + sensor1 664
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 accuracy55% within 1 km
≤100 m 52≤1 km 106≤10 km 117>10 km 10
285 georeferenced · 536 without coordinates
Open the institutions mapphysical evidence821
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 institutions43 of 62 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
ASUlocation not on record
220
Flagstaff, US
58
Bronx, US
56
Phoenix, US
51
Albuquerque, US
49
US
49
EL PASO, US
34
Claremont, US
34
McWane Science Centerlocation not on record
27
Riverside, US
27
Chicago, US
26
San Diego, US
24
Durham, US
21
CASlocation not on record
11
South Kensington, GB
9
Knoxville, US
8
Henderson, US
7
Chapel Hill, US
7
Fort Worth, US
6
Denver, US
5
Saint Louis, US
5
USFSlocation not on record
4
Austin, US
4
DOI/NPS, Colonial National Historical Parklocation not on record
4
San Luis Obispo, US
4
University of Stellenboschlocation not on record
4
Musee des Dinosaures d'Esperaza (Aude)location not on record
3
Irvine, US
3
Provo, US
3
Logan, US
3
Wuzhou, CN
2
Orem, US
2
Santa Barbara, US
2
Ensenada, MX
2
Minia, EG
2
Museo Nacional de Costa Rica (MNCR)location not on record
1
San Angelo, US
1
Ann Arbor, US
1
San Jose State University, Museum of Birds and Mammalslocation not on record
1
Chongqing Museumlocation not on record
1
DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record
1
Canadian Department of Agriculturelocation not on record
1
Corvallis, US
1
Davis, US
1
Mérida, MX
1
Arizona State University Biocollectionslocation not on record
1
Pullman, US
1
Hermosillo, MX
1
Miami, US
1
Clemson, US
1
Facultad de Zootecnia y Ecología, Universidad Autónoma de Chihuahualocation not on record
1
Smithsonian Institution, National Museum of Natural Historylocation not on record
1
Arcata, US
1
DOI/NPS, Greenbelt Parklocation not on record
1
University of Alberta Museumslocation not on record
1
Bloomington, US
1
Austin, US
1
San Diego Natural History Museum, Herbariumlocation not on record
1
Philadelphia, US
1
La Paz, MX
1
Severin-McDaniel Insect Collectionlocation not on record
1
Chadron, US
1
62 institutions · 803 of 821 vouchered records shown · 18 without an institution code
09Environmental DNA3 detections
Where the DNA of Pellaea truncata 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 found3
Studies independent surveys1
Countries1
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 3 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 median19.1 °C 16.1–22.1
Seasonal swing summer↔winter18.0 °C
Max temp (day)25.1 °C 22.4–27.8
Min temp (night)13.2 °C 9.80–16.6
Precipitation68.0 mm/mo 45.6–90.4
Air humidity50.2 % 48.1–52.4
Moisture balance-72.4 mm/mo -74.8–-69.9
Vapour deficit1,122 Pa 964–1,280
Wind speed2.60 m/s 2.10–3.00
Cloud cover31.6 % 28.2–35.1
CHELSA 1981–2010, ~9 km grid, at location & month of 2 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 Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility2 485 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI3 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics3 specimens↗
NCBIUS National Library of Medicinesequences↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗