Anadara transversa, or the Transverse ark clam, is a clam in the family Arcidae. It can be found along the Atlantic coast of North America, ranging from Massachusetts to Texas, including the West Indies.Abbott, R.T. & Morris, P.A. A Field Guide to Shells: Atlantic and Gulf Coasts and the West Indies. New York: Houghton Mifflin, 1995. 11. It is an invasive species in the eastern Mediterranean Sea. First found in Turkey in 1977, then Greece in 1993, and then the coast of Italy near Venice in 2000.
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 Anadara transversa has left across the world's sequence archives.
At a glance
DNA specimens12
BINs1
Marker genes1
eDNA detections13
Countries3
The DNA barcodethe species' typical barcode, built from every sequenced specimen
COI-5P661 bp consensus12 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. 99% of positions are identical in every specimen.
Where individuals differ — all 8 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)0.31%
Haplotypes4
BIN1
Most divergent pair0.45%
OtherN.AmericaEurope
Marker genes sequenced
★ 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
08Occurrence & distribution
Record type5 290 records
Wild obs. + sensor2 968
Museum / vouchered1 934
Fossil386
Other2
Origin
Native25
Introduced1
Range
Area of Occupancy AOO7 484 km²
Depth
0–200 m sunlit748
200–1000 m twilight0
1–4 km midnight0
>4 km abyssal0
median 10 m · max 161 m · 748 records with depth
Wildobservation + sensor
Human sightings and records, or camera-trap / sensor detections — someone (or a device) saw or captured the species in the wild.
Coordinate accuracy89% within 1 km
≤100 m 1 304≤1 km 325≤10 km 105>10 km 90
1 824 georeferenced · 1 144 without coordinates
Open the mapobservation + sensor2 968
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 accuracy44% within 1 km
≤100 m 39≤1 km 152≤10 km 168>10 km 80
439 georeferenced · 1 495 without coordinates
Open the institutions mapphysical evidence1 934
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 institutions15 of 38 geolocated
Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.
Institution
Specimens
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record
130
Cambridge, US
129
Washington, US
115
Delaware Museum of Nature and Sciencelocation not on record
89
North Carolina Museum of Natural Scienceslocation not on record
70
Chongqing Museumlocation not on record
63
Philadelphia, US
53
Chicago, US
46
Texas Cooperative Wildlife Collectionlocation not on record
25
San Nicolás de los Garza, MX
22
Los Angeles, US
22
Santa Barbara Museum of Natural Historylocation not on record
20
New Haven, US
19
Florida Atlantic University, Harbor Branch Oceanographic Museumlocation not on record
17
Denver, US
14
Natural History Museum Rotterdamlocation not on record
11
Saint John, CA
10
Paleontological Research Institutionlocation not on record
8
Padua universtiy?location not on record
8
Champaign, US
7
Toronto, CA
6
Chicago, US
5
Montgomery, US
3
CASlocation not on record
3
ELMClocation not on record
3
Mutare Museumlocation not on record
3
PUC-RSlocation not on record
2
Alabama Museum of Natural Historylocation not on record
2
Ann Arbor, US
2
Muséum d'histoire naturelle de Marseillelocation not on record
1
The Atlantic reference Centrelocation not on record
1
Provincia di Livornolocation not on record
1
UM-RSMASlocation not on record
1
EL PASO, US
1
Natural History Museum of Utahlocation not on record
1
ARMS-MBONlocation not on record
1
LUZlocation not on record
1
Sistema de Colecciones Biológicas, Escuela de Biología, Universidad de San Carlos de Guatemala location not on record
1
38 institutions · 916 of 1 934 vouchered records shown · 332 without an institution code
09Environmental DNA13 detections
Where the DNA of Anadara transversa 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 found13
Studies independent surveys2
Countries3
Verifiable raw sequence linked1
Signal confidence: moderateweighed across independent studies, places & mapped detections
Where its DNA was found
0 of 13 detections have coordinates
Open the map3 countries0
Research site; semi-industrial; 9.5 - Subtid…
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 median18.2 °C 10.2–22.4
Seasonal swing summer↔winter20.9 °C
Max temp (day)21.5 °C 13.6–25.4
Min temp (night)15.9 °C 6.70–20.7
Precipitation91.3 mm/mo 72.6–118
Air humidity60.4 % 57.3–63.1
Moisture balance9.30 mm/mo -39.8–42.9
Vapour deficit897 Pa 460–1,103
Wind speed2.40 m/s 2.30–5.70
Cloud cover37.2 % 35.9–57.6
CHELSA 1981–2010, ~9 km grid, at location & month of 10 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 Foundation3 languages↗
BioWikiNetmultilingual Wikipediamultilingual↗
GBIFGlobal Biodiversity Information Facility3 817 records↗
OBISOcean Biodiversity Information System1 473 records↗
ENAEuropean Nucleotide Archive · EMBL-EBI13 eDNA detections↗
BOLD SystemsCentre for Biodiversity Genomics12 specimens↗
Catalogue of LifeCOLtaxonomy↗
GLoBIGlobal Biotic Interactionsbiotic interactions↗