Asplenium resiliens, the blackstem spleenwort or little ebony spleenwort, is a species of fern native to the Western Hemisphere, ranging from the southern United States south to Uruguay, including parts of the Caribbean. Found on limestone substrates, it is named for its distinctive purplish-black stipe and rachis. A triploid, it is incapable of sexual reproduction and produces spores apogamously. First described by Martens and Galeotti in 1842 under the previously used name Asplenium parvulum, the species was given its current, valid name by Kunze in 1844. Several similar species are known from the tropics; A. resiliens may have arisen from these species by reticulate evolution, but precise relationships among the group are not yet certain.
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 Asplenium resiliens has left across the world's sequence archives.
At a glance
DNA specimens1
Marker genes1
GenBank sequences1
eDNA detections1
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.
★rbcL1
plant barcode
06Genome at a glanceCCDB
The complete instruction manualAsplenium resiliens 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.
CCDB · ipcn-api-dl — Werth, C. R. 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.
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 origin0.36 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 type1 954 records
Wild obs. + sensor808
Museum / vouchered1 146
Origin
Native24
Range
Area of Occupancy AOO5 044 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 accuracy72% within 1 km
≤100 m 412≤1 km 48≤10 km 23>10 km 155
638 georeferenced · 170 without coordinates
Open the mapobservation + sensor808
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 accuracy45% within 1 km
≤100 m 152≤1 km 124≤10 km 277>10 km 64
617 georeferenced · 529 without coordinates
Open the institutions mapphysical evidence1 146
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 institutions73 of 106 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Austin, US
136
Philadelphia, US
107
Bronx, US
86
Saint Louis, US
80
Tuscaloosa, US
44
Chapel Hill, US
41
Durango, MX
37
Fort Worth, US
36
Wuzhou, CN
33
Chicago, US
32
Córdoba, AR
31
ASUlocation not on record
29
Knoxville, US
29
Austin, US
29
St. Paul, US
26
Flagstaff, US
23
EL PASO, US
17
Mexico City, MX
16
McWane Science Centerlocation not on record
14
San Francisco, US
13
Minia, EG
13
Giardini Botanici Hanburylocation not on record
12
Durham, US
11
Albuquerque, US
11
Chongqing Museumlocation not on record
11
Burlington, US
10
US
10
Bloomington, US
9
San Angelo, US
9
BAYLUlocation not on record
9
WTUlocation not on record
9
San Isidro, AR
8
University of Stellenboschlocation not on record
7
Bangkok, TH
7
Tampa, US
6
Morgantown, US
6
Western Carolina Universitylocation not on record
6
Appalachian State Universitylocation not on record
5
James F. Matthews Center for Biodiversity Studieslocation not on record
5
Madison, US
5
Little Rock, US
5
GAlocation not on record
4
Tapachula, MX
4
Johnson City, US
4
National Biodiversity Institute, Costa Ricalocation not on record
4
Laboratory of Palaeontologylocation not on record
3
LDlocation not on record
3
Pullman, US
3
Linares, MX
3
Tuxtla Gutiérrez, MX
3
San Jose State University, Museum of Birds and Mammalslocation not on record
3
Ann Arbor, US
3
Williamsburg, US
3
Riverside, US
3
MCNAMlocation not on record
2
Columbia, US
2
Millersville, US
2
AUAlocation not on record
2
Claremont, US
2
University of Tennessee at Chattanoogalocation not on record
2
Ciudad de México, MX
2
Denton, US
2
Lord Fairfax Community Collegelocation not on record
2
The University of Arizonalocation not on record
2
Juriquilla, MX
2
Cambridge, US
2
Guatemala City, GT
2
Lubbock, US
2
Mississippi State, US
2
Museo Nacional de Costa Rica (MNCR)location not on record
2
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Texas A&M Universitylocation not on record
1
China Agricultural Universitylocation not on record
1
Corrientes, AR
1
Taipei, TW
1
Guasave, MX
1
Universidad Nacional de Colombia (UNAL)location not on record
1
Phoenix, US
1
CICYTEXlocation not on record
1
North Carolina Museum of Natural Scienceslocation not on record
1
DOI/NPS, Selma to Montgomery National Historic Traillocation not on record
1
BMlocation not on record
1
Wlocation not on record
1
Asheville, US
1
JBRJlocation not on record
1
San Luis Obispo, US
1
Orem, US
1
Provo, US
1
Calabar, NG
1
Brookings, US
1
Uppsala, SE
1
La Paz, BO
1
Zürich, CH
1
Ashland, US
1
USFSlocation not on record
1
Henderson, US
1
Cochabamba, BO
1
Elikins, US
1
Jardín Botánico José Celestino Mutis (JBBJCM)location not on record
1
Due West, US
1
Stephenville, US
1
Santa Barbara, US
1
Conway, US
1
Mérida, MX
1
New Brunswick, US
1
Norfolk, US
1
106 institutions · 1 144 of 1 146 vouchered records shown · 2 without an institution code
09Environmental DNA1 detections
Where the DNA of Asplenium resiliens 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.
WikipediaWikimedia Foundation2 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility1 954 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics1 specimens↗
NCBIUS National Library of Medicinesequences↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗