Pisidium amnicum is a species of very small freshwater clam, sometimes known as the greater European peaclam or the River pea shell. It is an aquatic bivalve in the family Sphaeriidae.
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 Pisidium amnicum has left across the world's sequence archives.
At a glance
DNA specimens35
BINs2
Marker genes1
eDNA detections27
Countries10
The DNA barcodethe species' typical barcode, built from every sequenced specimen
COI-5P657 bp consensus28 specimens
ACGT
▸ drag or hover over the strip to read any position — letter and how much it varies
Violet ticks below the strip = positions where individuals differ; flat = the species' unchanging signature. 98% of positions are identical in every specimen.
Where individuals differ — all 10 variable positions, in barcode order
Each circle is a barcode variant; bigger = more specimens, colour = region. Lines join the most similar variants and the tick marks count the mutations between them — a tight cluster is one “dialect”, a long line a more divergent lineage. Click a circle to list its actual specimens.
Diversity (π)1.1%
Haplotypes7
BINs2
Most divergent pair8.5%
EuropeN.America
Closest relatives by DNA barcode
The species whose COI barcode is most similar to this one — a quick “who is this most like”. The percentage is how much the barcode differs; it approximates, but is not, the full evolutionary tree.
★ 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.
★COI-5P
animal barcode
07Deep time2.58–0.77 Ma
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
Fossil range2.58–0.77 Ma Pleistocene
Dated fossil finds1
StatusNot recorded since 0.77 Ma
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 Pisidium amnicum. Above itBeside it, each dot is one dated fossil find — few enough to count, so they are drawn individually rather than as a graph.
fossil range (PBDB)each dot = one dated find
How it livedPBDB
Environmentfreshwater
Life habitinfaunal
Dietsuspension feeder
Motilityfacultatively mobile
Visionblind
Compositionaragonite
08Occurrence & distribution
Record type7 021 records
Wild obs. + sensor4 548
Museum / vouchered1 171
Fossil1 247
Other55
Origin
Native299
Range
Area of Occupancy AOO12 156 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 accuracy45% within 1 km
≤100 m 1 695≤1 km 178≤10 km 2 276>10 km 18
4 167 georeferenced · 381 without coordinates
Open the mapobservation + sensor4 548
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 accuracy51% within 1 km
≤100 m 285≤1 km 168≤10 km 382>10 km 47
882 georeferenced · 289 without coordinates
Open the institutions mapphysical evidence1 171
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 institutions23 of 58 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Musée des Confluenceslocation not on record
75
Salzburg, AT
65
Helsinki, FI
62
Bern, CH
49
Musee d'Histoire Naturallelocation not on record
43
Naturhistorisches Museum Wienlocation not on record
37
Adam Mickiewicz University in Poznańlocation not on record
32
Museum Ludovicae Ulricae, Zoology Institute of the University of Uppsalalocation not on record
31
Paro, BT
28
SNSDlocation not on record
28
Cambridge, US
26
Philadelphia, US
25
Provincia di Livornolocation not on record
22
Museo civico La Terra e l'Uomo di Crocetta del Montellolocation not on record
18
Zoological Museum, Moscow Lomonosov State Universitylocation not on record
18
Universität Zürich, Naturhistorisches Museumlocation not on record
16
Natural History Museum Rotterdamlocation not on record
12
Ann Arbor, US
12
VTDEClocation not on record
10
Stockholm, SE
9
IIIPlocation not on record
8
Fribourg, CH
8
North Carolina Museum of Natural Scienceslocation not on record
8
AQBGlocation not on record
8
Gothenburg, SE
7
SLU Artdatabankenlocation not on record
6
Paris, FR
6
DEMNA-DNElocation not on record
6
Frankfurt am Main
4
Barcelona, ES
4
Geneva, CH
4
Chongqing Museumlocation not on record
4
Toronto, CA
3
RWSlocation not on record
3
The Ohio State University Museum of Biological Diversitylocation not on record
3
Sion, CH
3
BioFokuslocation not on record
3
Muzeum i Instytut Zoologii Polskiej Akademii Nauklocation not on record
3
MZLUlocation not on record
3
South Kensington, GB
3
Natural History Museum, Londonlocation not on record
3
CBDClocation not on record
2
Naturmuseum Solothurnlocation not on record
2
Museo civico di Storia naturale Giacomo Doria di Genova | Giacomo Doria Natural History Museum in Genoalocation not on record
2
Chicago, US
2
Archäologie und Museum Baselland - Museum.BLlocation not on record
2
Brussels, BE
2
Delaware Museum of Nature and Sciencelocation not on record
2
Museo naturalistico archeologico di Vicenza | Vicenza naturalistic archeological Museumlocation not on record
1
Champaign, US
1
Washington, US
1
Environmental Protection Agency, Office of Research and Development, Duluth, MNlocation not on record
1
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
1
Saint John, CA
1
University of Pecs, Dept. of Ecology and Hydrobiologylocation not on record
1
Natural History Museum of Utahlocation not on record
1
New Haven, US
1
Natural History Museum of the Iberian Peninsula - NatMIP ("Museu de História Natural da Península Ibérica")location not on record
1
58 institutions · 742 of 1 171 vouchered records shown · 427 without an institution code
09Environmental DNA27 detections
Where the DNA of Pisidium amnicum 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 found27
Studies independent surveys1
Countries6
Signal confidence: weakweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 27 detections have coordinates
Open the map6 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.
Modelled climatemodelled
−15°Ctemperature across detection sites+40°C
Temperature median5.70 °C 5.70–12.4
Seasonal swing summer↔winter22.7 °C
Max temp (day)8.60 °C 8.60–16.6
Min temp (night)2.30 °C 1.80–9.90
Precipitation61.8 mm/mo 52.6–67.2
Air humidity65.5 % 59.6–65.5
Moisture balance4.40 mm/mo -6.50–4.40
Vapour deficit385 Pa 385–573
Wind speed3.90 m/s 3.20–4.10
Cloud cover49.3 % 46.0–50.6
CHELSA 1981–2010, ~9 km grid, at location & month of 19 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 Foundation4 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility7 020 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI27 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics35 specimens↗
Open Tree of LifeOpenTreephylogeny backbone↗
Paleobiology DatabasePBDB consortiumfossil record↗