Isoetes lacustris
speciesAt a glance
Sources12 archives
Databases and archives Isoetes lacustris's data was compiled from.
WikipediaWikimedia Foundation9 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility24 203 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI19 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics38 specimens↗
NCBIUS National Library of Medicinesequences↗
Open Tree of LifeOpenTreephylogeny backbone↗
CCDBChromosome Counts DB · Tel Aviv U.genome & karyotype↗
GoaTGenomes on a Tree · Sangergenome & karyotype↗
Paleobiology DatabasePBDB consortiumfossil record↗
WikidataWikimedia Foundationstructured facts↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.
Isoetes macrospora, the big-spore quillwort, is a species of quillwort in the Isoetaceae family. It can be found in the deep water of low nutrient lakes in the Precambrian Shield as well as in Newfoundland, Nova Scotia, Quebec, and Ontario. In the United States, it has been found in Minnesota and south, through the Appalachian Mountains to Virginia. It bears 3 to 17 long, stiff dark green leaves, sometimes with recurving tips. The sporangium can be 5 millimeters long and 4 millimeters wide, covered from one sixth to one quarter by the velum. The triangular ligule can grow up to 2 millimeters long. The spherical, white megaspores are 400 to 800 micrometers in diameter, and bear ridges that form honeycomb-like areas. The kidney-shaped microspores are 32 to 50 micrometers long, each with evenly spaced smooth papillae.
No narrative description available for this taxon yet.
Size & morphology3
Life cycle & reproduction9
Diet & foraging2
Habitat & environment9
Physiology & chemistry1
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 Isoetes lacustris 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 Isoetes lacustris 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.
Genome sizehow big the whole instruction manual is
Measured in base pairs (bp) — the individual letters of DNA (human ≈ 3.2 Gb, a bacterium a few million). The chart places this genome on a logarithmic scale — each step to the right is ten times bigger — among reference organisms. Across species a bigger genome loosely tracks with larger cells, slower growth and lower-energy lifestyles (powered flight favours small genomes) — yet it does not imply more genes or a more advanced organism (the long-standing C-value paradox).
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 11013×GoaT · DTOL Flowering Plants Estimates Kew · CCDB · nw-europe-fl · CCDB · ipcn-api-dl +3
2n 221×CCDB · fl-europaea
2n 1001×CCDB · fl-europaea
n 211×CCDB · CromoCat 2015
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 solid bar is the fossil range: the span between the oldest and the youngest fossil that palaeontologists have assigned to Isoetes lacustris. Above itBeside it, each dot is one dated fossil find — few enough to count, so they are drawn individually rather than as a graph.
Record type24 205 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.
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Holding institutions78 of 152 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
| Institution | Specimens |
|---|---|
| Helsinki, FI | 734 |
| Uppsala, SE | 399 |
| LDlocation not on record | 326 |
| Olocation not on record | 309 |
| Uniwersytet Wrocławskilocation not on record | 198 |
| Oulu, FI | 171 |
| Adam Mickiewicz University in Poznańlocation not on record | 144 |
| Bergen, NO | 140 |
| Trondheim, NO | 109 |
| Turku, FI | 103 |
| TROMlocation not on record | 102 |
| Tartu, EE | 99 |
| KMNlocation not on record | 94 |
| Oskarshamn, SE | 94 |
| SLU Artdatabankenlocation not on record | 92 |
| Moscow State Universitylocation not on record | 71 |
| Wlocation not on record | 63 |
| Université Lavallocation not on record | 57 |
| TUR-Alocation not on record | 44 |
| South Kensington, GB | 41 |
| Philadelphia, US | 41 |
| Madison, US | 39 |
| St. Paul, US | 36 |
| Chicago, US | 36 |
| Ann Arbor, US | 33 |
| Provincia di Livornolocation not on record | 26 |
| Jyväskylä, FI | 25 |
| Metsähallituslocation not on record | 25 |
| BDBClocation not on record | 24 |
| Meguro Parasitological Museumlocation not on record | 22 |
| Minia, EG | 21 |
| Barcelona, ES | 21 |
| Tampere, FI | 20 |
| Acadia Universitylocation not on record | 20 |
| Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record | 19 |
| GBS RAN - Glavny Botanichesky Sad Rossijskoj Akademii Nauklocation not on record | 15 |
| Saint John, CA | 15 |
| Garðabær, IS | 15 |
| McWane Science Centerlocation not on record | 13 |
| Irkutsk State Universitylocation not on record | 12 |
| Green Bay, US | 10 |
| DULlocation not on record | 9 |
| DBF-NHMDlocation not on record | 9 |
| Mlocation not on record | 9 |
| Dresden, DE | 9 |
| Burlington, US | 8 |
| Québec, CA | 8 |
| WTUlocation not on record | 8 |
| Tallinn, EE | 8 |
| Kuopio, FI | 8 |
| Toronto, CA | 7 |
| BFLlocation not on record | 7 |
| IPDNlocation not on record | 7 |
| University of Silesia in Katowicelocation not on record | 7 |
| Vancouver, CA | 7 |
| Wellington, NZ | 7 |
| BSBIlocation not on record | 7 |
| Museum Ludovicae Ulricae, Zoology Institute of the University of Uppsalalocation not on record | 7 |
| CJBGlocation not on record | 6 |
| Paris, FR | 6 |
| 5 | |
| University of Birminghamlocation not on record | 5 |
| Saint Louis, US | 5 |
| Bern, CH | 5 |
| Chapel Hill, US | 5 |
| Zürich, CH | 5 |
| BRNUlocation not on record | 5 |
| Görlitz, DE | 5 |
| Institute of Plant and Animal Ecology Ural Branch of the Russian Academy of Scienceslocation not on record | 5 |
| Royal Botanic Garden Edinburghlocation not on record | 4 |
| València, ES | 4 |
| Auckland, NZ | 4 |
| University of New Hampshirelocation not on record | 4 |
| Zürich, CH | 4 |
| University of Gdansk, Dept. of Plant Taxonomy & Nature Conservationlocation not on record | 3 |
| Montréal, CA | 3 |
| Frankfurt am Main | 3 |
| Pullman, US | 3 |
| Granada, ES | 3 |
| Fort Worth, US | 3 |
| Salzburg, AT | 3 |
| Philadelphia, US | 3 |
| Agriculture and Agri-Food Canadalocation not on record | 3 |
| Canadian Museum of Nature, National Herbarium of Canadalocation not on record | 3 |
| nbflocation not on record | 3 |
| San Sebastián, ES | 3 |
| Entomological Society of Latvialocation not on record | 2 |
| BIO-UNIPIlocation not on record | 2 |
| Conservatoire botanique national du Bassin parisienlocation not on record | 2 |
| Royal Ontario Museum, Green Plant Herbarium (TRT)location not on record | 2 |
| Tromso University Museumlocation not on record | 2 |
| University of British Columbia, Herbariumlocation not on record | 2 |
| MeiseBGlocation not on record | 2 |
| BClocation not on record | 2 |
| San Jose State University, Museum of Birds and Mammalslocation not on record | 2 |
| Kandalaksha State Nature Reservelocation not on record | 2 |
| Moscow, US | 2 |
| Brookings, US | 2 |
| Institut und Museum fuer Geologie und Palaeontologielocation not on record | 2 |
| Bourges, FR | 2 |
| Chongqing Museumlocation not on record | 2 |
| Institute of the biological problems of the North FEB RASlocation not on record | 2 |
| Trois-Rivières, CA | 2 |
| Tyumen State Universitylocation not on record | 2 |
| Knoxville, US | 2 |
| Tampa, US | 2 |
| Bronx, US | 2 |
| Regensburgische Botanische Gesellschaftlocation not on record | 2 |
| PRClocation not on record | 1 |
| Missoula, US | 1 |
| Staatliches Museum fuer Naturkunde Karlsruhe (State Museum of Natural History)location not on record | 1 |
| B.A. Bennett Herbariumlocation not on record | 1 |
| Montréal, CA | 1 |
| Tilburg, NL | 1 |
| Uniwersytet Rolniczy im. Hugona Kołłątaja w Krakowielocation not on record | 1 |
| EEZA-CSIClocation not on record | 1 |
| Austin, US | 1 |
| Umeå Universitylocation not on record | 1 |
| Morgantown, US | 1 |
| Royal Ontario Museumlocation not on record | 1 |
| Muséum Henri Lecoqlocation not on record | 1 |
| Porvoo, FI | 1 |
| University of Alberta Museumslocation not on record | 1 |
| WINlocation not on record | 1 |
| Vitoria, ES | 1 |
| IB FRC Komi SC UB RASlocation not on record | 1 |
| Whitewater, US | 1 |
| University of Stellenboschlocation not on record | 1 |
| Uniwersytet Opolskilocation not on record | 1 |
| Santiago de Compostela, ES | 1 |
| Durham, US | 1 |
| Forssa, FI | 1 |
| Musee des Dinosaures d'Esperaza (Aude)location not on record | 1 |
| University of Calgarylocation not on record | 1 |
| Porrentruy, CH | 1 |
| Cheney, US | 1 |
| Finnish Museum of Natural History, Botanical Museumlocation not on record | 1 |
| Texas A&M Universitylocation not on record | 1 |
| Madrid, ES | 1 |
| Boise, US | 1 |
| Columbia, US | 1 |
| Naturhistorische Gesellschaft Nürnberg e.V.location not on record | 1 |
| Xiamen, CN | 1 |
| Dekalb, US | 1 |
| Taipei, TW | 1 |
| Fargo, US | 1 |
| Kew, GB | 1 |
| John May Museum of Natural Historylocation not on record | 1 |
| Whitehorse, CA | 1 |
| Stockholm, SE | 1 |
| NMWlocation not on record | 1 |
| Berlin, DE | 1 |
Cultivated / Captivenot free-living
A living individual in a botanical garden, zoo or nursery — cultivated or kept, not free-living.
Where the DNA of Isoetes lacustris 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.