Diagnosis
provided by World Register of Marine Species
Test an elongate, convoluted branching tube, 0.7 mm to 5.0 mm in length, may have occasional knot-like swellings, tapering or clavate at the ends, attached by tough and rigid filaments to the interior of empty foraminiferal tests; wall a resistant proteinaceous sheath with concentric constrictions; single large nucleus, about 87 µm to 138 µmin diameter. Marine, cold water, living within empty foraminiferal tests. Holocene; N. Atlantic. (Loeblich & Tappan, 1987, Foraminiferal Genera and Their Classification)
Loeblich, A. R.; Tappan, H. (1987). Foraminiferal Genera and their Classification. Van Nostrand Reinhold Company, New York. 970pp.
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