Plagiostomum Schmidt, 1852
Plagiostomum girardi bermudensis Karling, 1978
Plagiostomum girardi subsp. girardi (Schmidt, 1857)
Plagiostomum girardi groenlandica Brandtner, 1934
Plagiostomum girardi hymani (Karling, 1962)
Plagiostomum girardi major Bohmig, 1890
Plagiostomum girardi minima Bohmig, 1890
Plagiostomum girardi ponticum Pereyaslawzewa, 1892
