Diagnosis
provided by World Register of Marine Species
Test arborescent, with basal trunk that may show irregular growth constrictions but is nonseptate, followed by a rapid expansion of tightly spaced nonseptate branchlets that repeatedly divide dichotomously, each successive division resulting in a marked decrease in tube diameter, tips of the branchlets rounded or knoblike; wall agglutinated of fine grained or clay particles and with a very thin inner organic layer. Holocene; N. Pacific, 5,899 m to 6,079 m; E. Atlantic, 4,706 m; Caribbean, 5,220 m to 7,950 m; W. Indian Ocean, 4,900 m. (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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