Invasion
Invasion Description
Mount Desert Region/ME/Gulf of Maine (Osburn 1932, as S. unicornis: 'Rare, one colony, without special data, encrusting a pebble)
Geographic Extent
Mount Desert Region/ME/Gulf of Maine (Osburn 1932, as S. unicornis: 'Rare, one colony, without special data, encrusting a pebble)
Vectors
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