Overview

Comprehensive Description

General Description

Amphiblestrum auritum is an encrusting bryozoan, most commonly found on the northern shores of the British Isles. The colonies form small rounded patches on stones, shells and algal holdfasts. The species is typically found on the lower shore, extending down to shallow subtidal waters, but it has also been recorded offshore at 70 m  in the western Black Sea (Skolka, 1983) and at 229 m in Northern Alaska (Osburn, 1950), although the latter record may be questionable.

Amphiblestrum auritum has mainly been recorded from cool temperate and boreal waters. It has been reported from Greenland through to the Azores. It is present in the southern North Sea and extends into the south-eastern Baltic. It occurs only rarely in the Mediterranean. In Britain, it is most common on northern shores, but has also been collected from Jersey.

Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Natural History Museum, London

Source: Bryozoa of the British Isles

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Distribution

Op het lagere strand en ondiep sublitoraal. Pas recent autochtoon ontdekt in Zeeland (Faasse & De Blauwe, 2004), algemener dan C. dumerilii. In de Baai van Heist (België) is op 11 maart 2004 een kolonie aangetroffen op een steen langs de oostelijke havendam van Zeebrugge. In België soms op aangespoelde voorwerpen.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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Physical Description

Diagnostic Description

Description

Korstvormend. Zoïden zeshoekig tot ovaal. Frontale verkalking miniem, verborgen door één, soms twee avicularia. Opesia ovaal, ¾ van het frontale oppervlak. 4 stekels aan het distaal einde van verse zoïden, één ervan dikwijls vergroot. Later blijft slechts 1 stekel over. Meestal twee avicularia op de proximale rand van de zoïde, indien de vorige zoïde een broedkamer heeft, dan staan ze er net distaal van. Broedkamers met karakteristieke richel die de rand van een driehoekige zone markeert. Embryo wit. Kolonies zonder broedkamers zijn moeilijk te onderscheiden van Callopora dumerilii.
  • 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.
Creative Commons Attribution 3.0 (CC BY 3.0)

© WoRMS for SMEBD

Source: World Register of Marine Species

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Ecology

Habitat

Depth range based on 42 specimens in 1 taxon.
Water temperature and chemistry ranges based on 20 samples.

Environmental ranges
  Depth range (m): 5.255 - 214
  Temperature range (°C): 5.960 - 12.863
  Nitrate (umol/L): 2.761 - 17.036
  Salinity (PPS): 32.397 - 35.192
  Oxygen (ml/l): 4.910 - 6.835
  Phosphate (umol/l): 0.382 - 1.316
  Silicate (umol/l): 2.314 - 17.288

Graphical representation

Depth range (m): 5.255 - 214

Temperature range (°C): 5.960 - 12.863

Nitrate (umol/L): 2.761 - 17.036

Salinity (PPS): 32.397 - 35.192

Oxygen (ml/l): 4.910 - 6.835

Phosphate (umol/l): 0.382 - 1.316

Silicate (umol/l): 2.314 - 17.288
 
Note: this information has not been validated. Check this *note*. Your feedback is most welcome.

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