|TUNICATA : APLOUSOBRANCHIA : Polycitoridae||SEA SQUIRTS|
Description: This inconspicuous colonial ascidian consists of small globular heads with short stalks, grouped together in a patch arising from a thin sheet of shared test. It is almost colourless, with a brown or grey overall hue and no obvious markings. Each head is about 5mm in diameter and consists of about 10 zooids arranged around a common central exhalent opening.
Habitat: Found normally in sand-scoured sites with significant tidal streams.
Distribution: Found from Plymouth and Salcombe in southern England north to the Irish Sea and North Channel. Probably under-recorded due to its inconspicuous appearance and small size.
Similar Species: Compare with Synoicum incrustatum and Polyclinum aurantium. These are both bigger colonies than Archidistoma aggregatum.
Key Identification Features:
Distribution Map from BioMar data for Ireland - Google Earth map: download this placemark (not got Google Earth installed?)
Distribution Map from NBN: Grid map (fast) : Interactive map (slow, requires login to view records) : National Biodiversity Network mapping facility, data for UK.
|Picton, B.E. & Morrow, C.C. (2015). Archidistoma aggregatum Garstang, 1891. [In] Encyclopedia of Marine Life of Britain and Ireland. |
http://www.habitas.org.uk/marinelife/species.asp?item=ZD230 Accessed on 2015-3-3
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