Schismus arabicus
Nees · speciesAt a glance
Sources11 archives
Databases and archives Schismus arabicus's data was compiled from.
WikipediaWikimedia Foundation6 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility3 070 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI15 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics45 specimens↗
NCBIUS National Library of Medicinesequences↗
GRIN TaxonomyUSDA-ARSdistribution & uses↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
PloiDBPloidy Databasegenome & karyotype
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Schismus arabicus is a species of grass known by the common name Arabian schismus. It is native to northern Africa, temperate Asia, and it is also known as an introduced species in the southwestern United States. It grows in many types of habitat, including disturbed areas. It is an annual grass with stems growing up to 16 centimeters long and lined with threadlike leaves. The short inflorescence bears spikelets under a centimeter long.
No narrative description available for this taxon yet.
Size & morphology11
Life cycle & reproduction9
Diet & foraging1
Habitat & environment12
Physiology & chemistry2
Other traits1
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 Schismus arabicus has left across the world's sequence archives.
At a glance
★ 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.
The complete instruction manual Schismus arabicus 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.
2n 126×CCDB · ipcn-api-dl · CCDB · eflora · CCDB · danthoinoides +2
n 65×CCDB · ipcn-api-dl · CCDB · book-ipcn75-78 · CCDB · danthoinoides +1
diploid inferred1×PloiDB · genus-scale
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
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.
Record type3 070 records
Origin
Range
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
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.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions66 of 109 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 | 239 |
| Riverside, US | 184 |
| Claremont, US | 144 |
| San Diego, US | 113 |
| Santa Barbara, US | 66 |
| Phoenix, US | 62 |
| Flagstaff, US | 55 |
| Davis, US | 54 |
| Moscow State Universitylocation not on record | 45 |
| San Luis Obispo, US | 44 |
| Bronx, US | 28 |
| GMBAlocation not on record | 21 |
| EL PASO, US | 20 |
| Logan, US | 19 |
| US | 17 |
| Canadian Department of Agriculturelocation not on record | 14 |
| Kew, GB | 14 |
| CASlocation not on record | 12 |
| Academy of Sciences of the Republic of Uzbekistanlocation not on record | 12 |
| Urumqi, CN | 11 |
| Kensington, AU | 11 |
| Catalina Island Conservancylocation not on record | 11 |
| DOI/NPS, Little Rock Central High School National Historic Sitelocation not on record | 10 |
| LDlocation not on record | 10 |
| Henderson, US | 9 |
| MeiseBGlocation not on record | 9 |
| Castelar, AR | 9 |
| Herbarium of South China Botanical Gardenlocation not on record | 9 |
| Adelaide, AU | 9 |
| Provo, US | 9 |
| Inner Mongolia Universitylocation not on record | 8 |
| Angwin, US | 8 |
| Beijing, CN | 8 |
| DOI/NPS, Colonial National Historical Parklocation not on record | 7 |
| Los Angeles, US | 7 |
| UChlocation not on record | 7 |
| Pocatello, US | 6 |
| Institute of Botany of the Academy of Sciences of the Republic of Uzbekistanlocation not on record | 6 |
| MAlocation not on record | 6 |
| Bratislava, SK | 6 |
| BRNUlocation not on record | 6 |
| Orem, US | 6 |
| Uniwersytet Opolskilocation not on record | 5 |
| Frankfurt am Main | 5 |
| Moscow, US | 5 |
| Emporia, US | 5 |
| Ciudad Autónoma de Buenos Aires, AR | 5 |
| Boise, US | 5 |
| Albuquerque, US | 5 |
| San Jose, US | 4 |
| Northridge, US | 4 |
| Bloomington, US | 4 |
| Arizona Western Collegelocation not on record | 4 |
| Long Beach, US | 4 |
| Severin-McDaniel Insect Collectionlocation not on record | 4 |
| Arcata, US | 4 |
| Irvine, US | 4 |
| BClocation not on record | 4 |
| Canberra, AU | 4 |
| Wuzhou, CN | 4 |
| Wlocation not on record | 4 |
| Edinburgh, GB | 3 |
| State Herbarium of South Australialocation not on record | 3 |
| Museo Entomologico de Leonlocation not on record | 3 |
| San Isidro, AR | 3 |
| Brisbane, AU | 3 |
| Hermosillo, MX | 3 |
| Xiamen, CN | 3 |
| Chadron, US | 3 |
| Fredericton Stock Culture Collectionlocation not on record | 2 |
| Mount Annan, AU | 2 |
| Palmerston, AU | 2 |
| Ciudad Juárez, MX | 2 |
| Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record | 2 |
| nlocation not on record | 2 |
| La Paz, MX | 2 |
| Berlin, DE | 2 |
| Arizona State University Biocollectionslocation not on record | 2 |
| QAUlocation not on record | 2 |
| University of Stellenboschlocation not on record | 2 |
| Ensenada, MX | 2 |
| Herbario Universidad de Concepciónlocation not on record | 2 |
| Fort Worth, US | 2 |
| Saint Louis, US | 2 |
| US | 1 |
| Tampa, US | 1 |
| GJOlocation not on record | 1 |
| Dekalb, US | 1 |
| Hazara Universitylocation not on record | 1 |
| Clemson, US | 1 |
| Dresden, DE | 1 |
| Pullman, US | 1 |
| Eastern Nevada Landscape Coalitionlocation not on record | 1 |
| Taipei, TW | 1 |
| San Bernardino, US | 1 |
| BAlocation not on record | 1 |
| University of Southern Mississippilocation not on record | 1 |
| Turpan Eremophytes Botanical Garden, Herbariumlocation not on record | 1 |
| San Diego Natural History Museum, Herbariumlocation not on record | 1 |
| Madison, US | 1 |
| Mexico City, MX | 1 |
| Santa Cruz, US | 1 |
| BAYLUlocation not on record | 1 |
| DOI/NPS, Greenbelt Parklocation not on record | 1 |
| Rishon Le Zion, IL | 1 |
| Caldwell, US | 1 |
| John T. Waterhouse Herbariumlocation not on record | 1 |
| Chongqing Museumlocation not on record | 1 |
| Valdosta State Universitylocation not on record | 1 |
Where the DNA of Schismus arabicus 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
Where its DNA was found
How strong is each trace?
Modelled climatemodelled
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.