Semicassis undulata

(Gmelin, 1791) · species

image placeholder — illustration coming later

Animalia/Mollusca/Gastropoda/Littorinimorpha/Cassidae/Semicassis

At a glance

Occurrence records617

Data sources9

Biological traits2

DNA specimens0

eDNA detections1

Sources9 archives

Databases and archives Semicassis undulata's data was compiled from.

WikipediaWikimedia Foundation3 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility577 records↗

OBISOcean Biodiversity Information System40 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI1 eDNA detections↗

LOTUSNatural Products (Wikidata)compounds↗

NPASSNat. Product Activity & Species Sourcecompounds↗

Open Tree of LifeOpenTreephylogeny backbone↗

Catalogue of LifeCOLtaxonomy↗

On this page5 sections

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

NarrativeWikipediaarticle

Traits & measurements1 literature sources2 traits

Chemical compositionLOTUS · NPASS73 compounds

Occurrence & distributionGBIF · OBIS617 records

Environmental DNA1 datasets · 1 countries1 detections

01Narrative

Semicassis undulata is a Mediterranean species of medium-sized sea snail, a marine gastropod mollusc in the subfamily Cassinae, the helmet snails and bonnet snails.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesSeaLifeBase

Habitat & environment2

Habitat saltwateryes

Habitat zonedemersal

03Chemical composition73 compounds

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

Compound class profile5 classes

Guaiane sesquiterpenoids22

Germacrane sesquiterpenoids9

Flavonols9

Flavones9

Bisabolane sesquiterpenoids6

Documented compounds73 total

Tissue Source Quantified only

Compound	Amount	Source
(-)-Kaur-16-ene	present	LOTUS
(1R,2S,3S,6R,7S,10R,11S)-1,6,10-trimethyl-4,14-dioxatetracyclo[9.2.1.02,10.03,7]tetradecan-5-one	present	NPASS
(1R,4S,5S)-2-methyl-5-[(2R)-6-methylhept-5-en-2-yl]cyclohex-2-ene-1,4-diol	present	NPASS
(1S,2S,4R,7E,11S,12R)-4,8,12-trimethyl-3,14-dioxatricyclo[9.3.0.02,4]tetradec-7-en-13-one	present	NPASS
(3R,3As,5aR,6R,9aS,9bS)-6-hydroxy-3,5a-dimethyl-9-methylidene-3a,4,5,6,7,8,9a,9b-octahydro-3H-benzo[g][1]benzofuran-2-one	present	NPASS
(3R,3aS,5aR,6R,9bS)-6-hydroxy-3,5a,9-trimethyl-3,3a,4,5,6,7,8,9b-octahydrobenzo[g][1]benzofuran-2-one	present	NPASS
(3R,3aS,5aR,6R,9R,9aS,9bS)-6,9-dihydroxy-3,5a,9-trimethyl-3a,4,5,6,7,8,9a,9b-octahydro-3H-benzo[g][1]benzofuran-2-one	present	NPASS
(3R,3aS,7R,10E,11aS)-7-hydroxy-3,10-dimethyl-6-methylidene-3,3a,4,5,7,8,9,11a-octahydrocyclodeca[b]furan-2-one	present	NPASS
(3S,3aR,4S,6S,9bS)-4-(Acetyloxy)-3a,4,5,6,8,9b-hexahydro-6-hydroxy-3,6,9-trimethylazuleno[4,5-b]furan-2(3H)-one	present	NPASS
(3S,3aR,4S,6S,9bS)-4-(Acetyloxy)-3a,5,6,9b-tetrahydro-6-hydroxy-3,6,9-trimethyl-4H-cyclohepta(2,1-b:3,4-c')difuran-2(3H)-one	present	NPASS

05DNA & barcoding1 eDNA hits

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 Semicassis undulata has left across the world's sequence archives.

At a glance

eDNA detections1

Countries1

08Occurrence & distribution

Record type617 records

Wild obs. + sensor505

Museum / vouchered107

Other5

Range

Area of Occupancy AOO1 556 km²

Depth

0–200 m sunlit27

200–1000 m twilight1

1–4 km midnight0

>4 km abyssal0

median 51 m · max 355 m · 28 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 accuracy86% within 1 km

≤100 m 177≤1 km 128≤10 km 37>10 km 12

354 georeferenced · 151 without coordinates

Open the mapobservation + sensor505

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 accuracy36% within 1 km

≤100 m 15≤1 km 13≤10 km 28>10 km 22

78 georeferenced · 29 without coordinates

Open the institutions mapphysical evidence107

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 institutions6 of 15 geolocated

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

Institution	Specimens
Natural History Museum Rotterdamlocation not on record	44
Barcelona, ES	10
ICATMARlocation not on record	8
Brussels, BE	6
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record	5
RBINS-Scientific Heritagelocation not on record	5
Santa Barbara Museum of Natural Historylocation not on record	4
Banyoles, ES	3
Museu Nacional de História Natural e da Ciêncialocation not on record	2
NTNU-VMlocation not on record	1
Salzburg, AT	1
Denver, US	1
Cambridge, US	1
ICM-CSIClocation not on record	1
SCSDlocation not on record	1

15 institutions · 93 of 107 vouchered records shown

09Environmental DNA1 detections

Where the DNA of Semicassis undulata 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 found1

Studies independent surveys1

Countries1

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

Where its DNA was found

0 of 1 detections have coordinates

Open the map1 country0

Sandy bottom

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 median24.4 °C 24.4–24.4

Seasonal swing summer↔winter12.6 °C

Max temp (day)26.4 °C

Min temp (night)22.0 °C

Precipitation1.10 mm/mo

Air humidity63.5 %

Vapour deficit1,109 Pa

Cloud cover9.10 %

CHELSA 1981–2010, ~9 km grid, at location & month of 1 detection point · 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.

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