Overview

Distribution

Soms op aangespoeld plastic of riemwiervoetjes, meestal weinig opvallend. Tussen 1903 en 1908 (collectie KBIN) en in 2004-2005 aangetroffen op keien en schelpkleppen op de Hinderbanken.
  • 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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southern Gaspe waters (Baie des Chaleurs, Gaspe Bay to American, Orphan and Bradelle banks; eastern boundary: eastern Bradelle Valley), Gulf of St. Lawrence (unspecified region), lower North shore; middle North Shore (from Sept- Iles to Cape Whittle, including the Cape Breton Channel)
  • North-West Atlantic Ocean species (NWARMS)
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Source: World Register of Marine Species

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Hippothoa divaricata is widely distributed in the North Atlantic from Spitzbergen south to the Bay of Biscay and the Mediterranean. Records from outside this area are unreliable, owing to confusion with related species.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Physical Description

Morphology

Hippothoa divaricata forms adnate runner-like colonies composed of delicate uniserial branches, closely adhering to the substrate. The species is typically small, glossy and pearly white in colour. Autozooids are slender and club-shaped, with a long narrow thread-like portion proximally (closest to the colony origin) and a dilated distal section. The slender proximal section is one-half to twice as long as the distal section.

Each autozooid gives rise to a maximum of four lateral buds (new autozooids), with up to two buds each side, spreading diagonally to give an “x” shape. Autozooids are typically 0.3 mm long.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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Diagnostic Description

Description

Een tengere vastgehechte kolonie van zoïden op één rij, rijen vertakkend. Elke zoïde is de oorsprong van maximaal 4 vertakkingen, die schuin van de zoïde vertrekken. Zoïden 0,3 mm lang, langwerpig met een smal proximaal deel en een verdikt distaal deel. Eerst doorschijnend, later wit, meestal met een centrale kiel in de lengterichting. Opening langer dan breed, sinus V-vormig, smal en diep. Vrouwelijke zoïden (met broedkamer) even groot als gewone zoïden, maar het smalle proximale deel is wat korter. Opening bijna rond met sinus. Heel kleine zoöeciulen met kleine distale opening komen voor. Broedkamers niet geperforeerd, opening samenvallend met de zoïdenopening.
  • 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

infralittoral 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 4 specimens in 1 taxon.
Water temperature and chemistry ranges based on 1 sample.

Environmental ranges
  Depth range (m): 0.1 - 23.77
  Temperature range (°C): 9.823 - 9.823
  Nitrate (umol/L): 7.608 - 7.608
  Salinity (PPS): 32.111 - 32.111
  Oxygen (ml/l): 6.643 - 6.643
  Phosphate (umol/l): 1.021 - 1.021
  Silicate (umol/l): 14.910 - 14.910

Graphical representation

Depth range (m): 0.1 - 23.77
 
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 and shells. It is mainly found in subtidal waters, but also rarely on the lower shore.

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© Natural History Museum, London

Source: Bryozoa of the British Isles

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