Ptychogena hyperborea

Kramp, 1942

Umbrella 15 mm wide, 8 mm high, very thick; manubrium broad, quadrangular, with 4 large perradial lobes; mouth somewhat folded; gonads in 2-3 pairs of lateral diverticula on either side of proximal half of radial canals above manubrial lobes; about 80 marginal tentacles, probably as many cordyli.

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