Sphaerechinus granularis

(Lamarck, 1816) · species

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Animalia/Echinodermata/Echinoidea/Camarodonta/Toxopneustidae/Sphaerechinus

At a glance

Occurrence records8 311

Data sources12

Biological traits4

DNA specimens6

eDNA detections6

Sources12 archives

Databases and archives Sphaerechinus granularis's data was compiled from.

WikipediaWikimedia Foundation8 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility7 978 records↗

OBISOcean Biodiversity Information System333 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI6 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics6 specimens↗

NPASSNat. Product Activity & Species Sourcecompounds↗

Open Tree of LifeOpenTreephylogeny backbone↗

GoaTGenomes on a Tree · Sangergenome & karyotype↗

NCBIUS National Library of Medicinegenome & karyotype↗

Catalogue of LifeCOLtaxonomy↗

GLoBIGlobal Biotic Interactionsbiotic interactions↗

On this page7 sections

Every layer below draws on the sources above — open one to explore it, or use ← → to move between tabs.

NarrativeWikipediaarticle

Traits & measurements1 literature sources4 traits

Chemical compositionNPASS55 compounds

Occurrence & distributionGBIF · OBIS8 311 records

Environmental DNA1 datasets · 0 countries6 detections

DNA & barcodingBOLD6 specimens

Genome at a glanceGoaT · NCBI≈991 Mbp

01Narrative

Sphaerechinus granularis is a species of sea urchin in the family Toxopneustidae, commonly known as the violet sea urchin, or sometimes the purple sea urchin (though the latter is also a common name for a Pacific sea urchin Strongylocentrotus purpuratus). Its range includes the Mediterranean Sea and eastern Atlantic Ocean.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesSeaLifeBase

Habitat & environment2

Habitat saltwateryes

Habitat zonebenthic

Other traits2

Depth max130 m

Depth min2 m

03Chemical composition55 compounds

Compounds documented for Sphaerechinus granularis across natural-product and food-composition databases — not just the ~150 nutrients on a classic label ("nutritional dark matter").

Compound class profile5 classes

Isoquinoline alkaloids21

Flavanones4

Amarylidaceae alkaloids2

Isoquinoline alkaloids $ Tetrahydroisoquinoline alkaloids2

Aporphine alkaloids $ Isoquinoline alkaloids2

Documented compounds55 total

Tissue Source Quantified only

Compound	Amount	Source
(-)-7-Hydroxyflavanone	present	NPASS
(-)-Argemonine	present	NPASS
(-)-Isoboldine	present	NPASS
(-)-N-methylcaryachine	present	NPASS
(-)-Pinostrobin	present	NPASS
(1'S,2R,4R)-10,11-dimethoxy-5-methylspiro[5-azatricyclo[6.3.1.04,12]dodeca-1(12),8,10-triene-2,6'-cyclohex-2-ene]-1'-ol	present	NPASS
(1'S,2S,4R)-10,11-dimethoxy-5-methylspiro[5-azatricyclo[6.3.1.04,12]dodeca-1(12),8,10-triene-2,4'-cyclohex-2-ene]-1'-ol	present	NPASS
(1'S,2S,4R)-10-methoxy-5-methylspiro[5-azatricyclo[6.3.1.04,12]dodeca-1(12),8,10-triene-2,4'-cyclohex-2-ene]-1',11-diol	present	NPASS
(1R,12R)-15-methoxy-20-methyl-5,7-dioxa-20-azapentacyclo[10.7.1.02,10.04,8.013,18]icosa-2,4(8),9,13,15,17-hexaen-16-ol	present	NPASS
(1R,12R,20S)-15,16-dimethoxy-20-methyl-20-oxido-5,7-dioxa-20-azoniapentacyclo[10.7.1.02,10.04,8.013,18]icosa-2,4(8),9,13,15,17-hexaene	present	NPASS

05DNA & barcoding6 specimens

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 Sphaerechinus granularis has left across the world's sequence archives.

At a glance

DNA specimens6

Marker genes1

eDNA detections6

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-3P

animal barcode

06Genome at a glanceGoaT · NCBI

The complete instruction manual Sphaerechinus granularis 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

Genome size≈991 333 594 bp assembly estimate

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).

BACTERIUM Carsonella ruddii0.00016 Gb

FUNGUS0.04 Gb

INSECT0.25 Gb

THIS GENOME Sphaerechinus granularis0.99 Gb

HUMAN3.2 Gb

WHEAT17 Gb

FERN Tmesipteris160.45 Gb

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.

Chromosomes2n = 40 n = 20

Chromosome-count records — grouped by value · 2n = full set, n = gamete · click a value for sources & references

2n 401×GoaT · Animal Chromosome Counts Database

GoaT · Animal Chromosome Counts Database — ↗

Sequencing statusassembly quality — how far to trust these numbers

Assembly level tells you how finished the sequence is — from fragmented contigs, through scaffolds, up to a full chromosome-level assembly. BUSCO % estimates completeness: the share of genes expected to be present that were actually found. These describe the data quality, not the organism.

Assembly levelChromosome

08Occurrence & distribution

Record type8 311 records

Wild obs. + sensor5 575

Museum / vouchered154

Other2 582

Origin

Native728

Range

Area of Occupancy AOO5 984 km²

Depth

0–200 m sunlit279

200–1000 m twilight4

1–4 km midnight0

>4 km abyssal0

median 52.5 m · max 445 m · 283 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 accuracy91% within 1 km

≤100 m 944≤1 km 1 400≤10 km 177>10 km 49

2 570 georeferenced · 3 005 without coordinates

Open the mapobservation + sensor5 575

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 accuracy24% within 1 km

≤100 m 2≤1 km 9≤10 km 12>10 km 22

45 georeferenced · 109 without coordinates

Open the institutions mapphysical evidence154

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 institutions12 of 22 geolocated

Institutions and collections holding physical, vouchered specimens of this species — click a row to fly to it on the map.

Institution	Specimens
Cambridge, US	25
Washington, US	21
Institut Francais pour l'Etude de la Merlocation not on record	15
486location not on record	12
Paris, FR	7
South Kensington, GB	7
SCSDlocation not on record	5
Brussels, BE	3
Chicago, US	3
ICM-CSIClocation not on record	2
Helsinki, FI	2
CASlocation not on record	2
Los Angeles, US	2
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record	1
Barcelona, ES	1
IEO-COMA-CSIClocation not on record	1
ICATMARlocation not on record	1
Stockholm, SE	1
Tartu, EE	1
Laboratoria di biologia marina di Triestelocation not on record	1
Brussels, BE	1
Eco laboratory geochemistry Benthic Environments UMR 8222 (4503) Université de Liège Underwater research and oceanographic station (4501)location not on record	1

22 institutions · 115 of 154 vouchered records shown · 3 without an institution code

09Environmental DNA6 detections

Where the DNA of Sphaerechinus granularis 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 found6

Studies independent surveys1

Signal confidence: weakweighed across independent studies, places & mapped detections

Where its DNA was found

0 of 6 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.

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Sphaerechinus granularis

At a glance

Sources12 archives

Habitat & environment2

Other traits2

Compound class profile5 classes

Documented compounds55 total

At a glance

Genome sizehow big the whole instruction manual is

Chromosomes & ploidyhow the DNA is packaged

Sequencing statusassembly quality — how far to trust these numbers

Record type8 311 records

Origin

Range

Depth

Wildobservation + sensor

Museum / Voucheredphysical evidence

Wildobservation + sensor

Holding institutions12 of 22 geolocated

Signal

Where its DNA was found

How strong is each trace?

Record type8 311 records