Placida dendritica

(Alder & Hancock, 1843) · species

image placeholder — illustration coming later

Animalia/Mollusca/Gastropoda/Limapontiidae/Placida

At a glance

Occurrence records867

Data sources10

Biological traits4

DNA specimens43

eDNA detections172

Sources10 archives

Databases and archives Placida dendritica's data was compiled from.

WikipediaWikimedia Foundation3 languages↗

BioWikiNetmultilingual Wikipediamultilingual↗

GBIFGlobal Biodiversity Information Facility751 records↗

OBISOcean Biodiversity Information System116 records↗

ENAEuropean Nucleotide Archive · EMBL-EBI172 eDNA detections↗

BOLD SystemsCentre for Biodiversity Genomics43 specimens↗

LOTUSNatural Products (Wikidata)compounds↗

Open Tree of LifeOpenTreephylogeny backbone↗

Catalogue of LifeCOLtaxonomy↗

GLoBIGlobal Biotic Interactionsbiotic interactions↗

On this page6 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 compositionLOTUS14 compounds

Occurrence & distributionGBIF · OBIS867 records

Environmental DNA2 datasets · 6 countries172 detections

DNA & barcodingBOLD43 specimens

01Narrative

Placida dendritica is a species of minute sea slug, a marine opisthobranch gastropod mollusk or micromollusk in the family Limapontiidae.WoRMS : Placida dendritica accessed : 13 October 2010] Despite a superficial resemblance, this is not a nudibranch, it is a sacoglossan (i.e. it is in the order Sacoglossa). Like most sacoglossans, Placida dendritica feeds on coenocytic green algae. It is able to retain the chloroplasts for a short period, however the ingested plastids are not functional, and do not provide nutritional benefit to the animal. Goodnight, S. (2012). Field and Laboratory Observations of Two Gulf of Maine Sacoglossans. University of New Hampshire, Durham, NH.

No narrative description available for this taxon yet.

02Traits & measurements

SourcesSeaLifeBase

Size & morphology1

Body length0.08 cm

Habitat & environment2

Habitat saltwateryes

Habitat zonebenthic

Other traits1

Vulnerability10

03Chemical composition14 compounds

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

Compound class profile2 classes

4-pyrone derivatives8

2-pyrone derivatives6

Documented compounds14 total

Tissue Source Quantified only

Compound	Amount	Source
2-[(E,5R)-5-hydroperoxy-4-methylidenehept-2-en-2-yl]-6-methoxy-3,5-dimethylpyran-4-one	present	LOTUS
2-Methoxy-3,5-dimethyl-6-(4-methylhexa-2,4-dien-2-yl)pyran-4-one	present	LOTUS
2-methoxy-3,5-dimethyl-6-[(2E,4Z)-4-methylhexa-2,4-dien-2-yl]pyran-4-one	present	LOTUS
2-methoxy-3,5-dimethyl-6-[(2Z,4Z)-4-methylhexa-2,4-dien-2-yl]pyran-4-one	present	LOTUS
4-Methoxy-3,5-dimethyl-6-(4-methylhexa-2,4-dien-2-yl)pyran-2-one	present	LOTUS
4-methoxy-5-methyl-6-[(2R)-pentan-2-yl]pyran-2-one	present	LOTUS
4-methoxy-5-methyl-6-[(E,3R)-3-methylhex-1-enyl]pyran-2-one	present	LOTUS
4-methoxy-5-methyl-6-[(E,3R)-3-methylpent-1-enyl]pyran-2-one	present	LOTUS
4-methoxy-5-methyl-6-[(E,3S)-3-methylpent-1-enyl]pyran-2-one	present	LOTUS
Ifhbfwlmlspism-fkjilziqsa-	present	LOTUS

05DNA & barcoding43 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 Placida dendritica has left across the world's sequence archives.

At a glance

DNA specimens43

BINs6

Marker genes1

eDNA detections172

Countries9

The DNA barcodethe species' typical barcode, built from every sequenced specimen

COI-5P657 bp consensus37 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. 74% of positions are identical in every specimen.

Where individuals differ — all 171 variable positions, in barcode order

4Tmostly conserved

12Amostly conserved

13Avariable

15Tmostly conserved

21Tvariable

24Gvariable

33Tmostly conserved

36Tmostly conserved

39Tvariable

42Tvariable

45Cvariable

48Gvariable

49Tvariable

51Avariable

54Tvariable

55Tvariable

57Avariable

58Tmostly conserved

60Avariable

72Amostly conserved

78Gvariable

81Tvariable

84Cvariable

89Cmostly conserved

90Tvariable

91Cvariable

93Tmostly conserved

94Tmostly conserved

99Gvariable

102Tmostly conserved

105Tvariable

108Tvariable

114Cmostly conserved

123Cvariable

126Tmostly conserved

129Amostly conserved

132Amostly conserved

138Tmostly conserved

141Cvariable

144Gvariable

147Avariable

159Amostly conserved

162Tvariable

165Gmostly conserved

168Tmostly conserved

169Cmostly conserved

171Tmostly conserved

177Tvariable

180Avariable

183Amostly conserved

186Cmostly conserved

189Amostly conserved

192Tmostly conserved

195Gvariable

198Gmostly conserved

201Tvariable

204Cmostly conserved

207Cmostly conserved

208Cmostly conserved

210Amostly conserved

216Gmostly conserved

219Amostly conserved

222Tmostly conserved

231Gvariable

234Tmostly conserved

237Tmostly conserved

240Amostly conserved

243Amostly conserved

249Cmostly conserved

252Amostly conserved

255Gvariable

258Cmostly conserved

264Tmostly conserved

265Cvariable

267Thighly variable

270Amostly conserved

273Tmostly conserved

279Tvariable

282Tvariable

283Tmostly conserved

285Amostly conserved

286Tmostly conserved

288Amostly conserved

291Gmostly conserved

294Tvariable

297Tmostly conserved

300Cmostly conserved

303Cmostly conserved

321Avariable

324Amostly conserved

330Gmostly conserved

342Tmostly conserved

348Amostly conserved

354Tvariable

357Avariable

360Tmostly conserved

363Cvariable

366Tvariable

369Amostly conserved

381Gvariable

390Amostly conserved

402Tvariable

405Cmostly conserved

406Cmostly conserved

411Amostly conserved

417Gmostly conserved

429Amostly conserved

435Gvariable

453Cmostly conserved

465Gvariable

468Amostly conserved

471Gvariable

474Cvariable

477Tvariable

480Tmostly conserved

483Avariable

489Gvariable

492Tvariable

495Avariable

498Tmostly conserved

+51 more variable positions not shown

ACTTTATATATAATTTTTGGTATGTGATGTGGTCTTGTTGGTACCGGGTTAAGTTTATTAATTCGTTTTGAATTAGGGACTTCCGGTGCT …

Variant network

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)11.3%

Haplotypes17

BINs6

Most divergent pair19.5%

OtherEuropeN.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.

Elysia ornatasame order15.6%Elysia canguzuasame order15.8%Elysia marginatasame order16.7%Hermaea oliviaesame order17.0%Elysia patinasame order17.2%

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 type867 records

Wild obs. + sensor607

Museum / vouchered258

Other2

Range

Area of Occupancy AOO1 420 km²

Depth

0–200 m sunlit21

200–1000 m twilight0

1–4 km midnight0

>4 km abyssal0

median 9 m · max 45.7 m · 21 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 accuracy79% within 1 km

≤100 m 332≤1 km 110≤10 km 20>10 km 101

563 georeferenced · 44 without coordinates

Open the mapobservation + sensor607

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 accuracy74% within 1 km

≤100 m 28≤1 km 83≤10 km 30>10 km 10

151 georeferenced · 107 without coordinates

Open the institutions mapphysical evidence258

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 institutions10 of 20 geolocated

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

Institution	Specimens
CASlocation not on record	36
Museums Victorialocation not on record	24
Sydney, AU	16
Bergen, NO	12
Florida Museum of Natural History- Zoology, Paleontology & Paleobotanylocation not on record	7
DASSHlocation not on record	7
PNHSlocation not on record	6
NTNU-VMlocation not on record	4
Washington, US	4
New Haven, US	3
Cambridge, US	3
Hakai Institutelocation not on record	3
Victoria, CA	3
Toyohashi Museum Of Natural Historylocation not on record	3
Natick, US	2
Gothenburg, SE	1
Edmonton, CA	1
Museo de Historia Natural, Universidad Autónoma de Baja California Surlocation not on record	1
Toronto, CA	1
Western Australian Museumlocation not on record	1

20 institutions · 138 of 258 vouchered records shown · 10 without an institution code

09Environmental DNA172 detections

Where the DNA of Placida dendritica 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 found172

Studies independent surveys2

Countries6

Verifiable raw sequence linked138

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

Where its DNA was found

0 of 172 detections have coordinates

Open the map6 countries0

dockPlanktonicHard substrate (rocks)Surf and SandRock Outcroprocky reef, Macrocystis pyrifera forest

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 median18.4 °C -7.30–18.7

Seasonal swing summer↔winter25.9 °C

Max temp (day)20.2 °C -3.50–21.9

Min temp (night)16.5 °C -10.5–17.2

Precipitation96.6 mm/mo 88.1–112

Air humidity62.2 % 60.9–64.0

Moisture balance-25.2 mm/mo

Vapour deficit805 Pa 131–840

Wind speed4.70 m/s

Cloud cover52.2 % 46.6–59.6

CHELSA 1981–2010, ~9 km grid, at location & month of 161 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.

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