Overview

Distribution

In juni 2005 werd een levende kolonie ontdekt op een steen tussen de Hinderbanken. Spoelt in België soms aan op plastic.
  • De Blauwe, H. (2009). Mosdiertjes van de Zuidelijke Bocht van de Noordzee. Determinatiewerk voor België en Nederland. Uitgave Vlaams Instituut voor de Zee, Oostende: 464pp.
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Source: World Register of Marine Species

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Gulf of St. Lawrence (unspecified region), lower North Shore, southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley), middle north shore (from Sept- Iles to Cape Whittle, including the Mingan Islands); Prince Edward Island (from the northern tip of Miscou Island, N.B. to Cape Breton Island south of Cheticamp, including the Northumberland Strait and Georges Bay to the Canso Strait causeway).
  • North-West Atlantic Ocean species (NWARMS)
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Source: World Register of Marine Species

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Escharella ventricosa is distributed from the western Mediterranean to Shetland, Faroe and western Norway. In the British Isles, the species is widespread and abundant.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Physical Description

Morphology

Escharella ventricosa is an encrusting bryozoan. Colonies form greyish-white, often silvery and glistening broad sheets which are composed of a single layer of autozooids. Autozooids are oval to hexagonal and strongly convex. They range in size from 0.55-0.7 mm by 0.45-0.55 mm, with four stout spines present.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Diagnostic Description

Description

De kolonie vormt een korst. Zoïden ovaal tot zeshoekig, sterk convex. Lengte tussen E. immersa en E. variolosa, nl. 0,55 mm tot 0,7 mm. Frontaal oppervlak fijn gekorreld, glasachtig en glinsterend, met het patroon van heel kleine rimpels. Heel kleine, onopvallende marginale poriën. De lyrula is het breedst aan zijn distale rand en heeft opgekrulde, spitse hoeken. Heel kleine, stompe scharnierpunten. 4 dikke distale orale stekels, ook bij broedkamers (6 stekels bij de eerste zoïden die uit de ancestrula ontspringen). De proximale bult aan de opening is afgeknot. Broedkamers bolvormig. Ancestrula ovaal met een frontaal membraan dat omringd is door 11 stekels, onder de proximale helft van het membraan ligt een kalklaag.
  • De Blauwe, H. (2009). Mosdiertjes van de Zuidelijke Bocht van de Noordzee. Determinatiewerk voor België en Nederland. Uitgave Vlaams Instituut voor de Zee, Oostende: 464pp.
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© WoRMS for SMEBD

Source: World Register of Marine Species

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Ecology

Habitat

bathyal, infralittoral and circalittoral of the Gulf and estuary
  • North-West Atlantic Ocean species (NWARMS)
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Source: World Register of Marine Species

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Depth range based on 29 specimens in 1 taxon.
Water temperature and chemistry ranges based on 11 samples.

Environmental ranges
  Depth range (m): 0 - 201
  Temperature range (°C): 4.685 - 10.558
  Nitrate (umol/L): 2.872 - 17.420
  Salinity (PPS): 32.125 - 34.868
  Oxygen (ml/l): 4.493 - 6.775
  Phosphate (umol/l): 0.382 - 1.283
  Silicate (umol/l): 2.052 - 13.543

Graphical representation

Depth range (m): 0 - 201

Temperature range (°C): 4.685 - 10.558

Nitrate (umol/L): 2.872 - 17.420

Salinity (PPS): 32.125 - 34.868

Oxygen (ml/l): 4.493 - 6.775

Phosphate (umol/l): 0.382 - 1.283

Silicate (umol/l): 2.052 - 13.543
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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The species is able to colonise stones, shells, calcified bryozoans and occasionally kelp holdfasts in subtidal offshore waters down to 450 m.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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