Diagnosis
provided by World Register of Marine Species
Test oval to spherical, 60 µm to 350 µmin length; wall membranous, smooth or lightly covered with foreign matter; aperture single, lateral or subterminal, may be a narrow slit; cytoplasm clear, yellowish, distinctly granular, with pseudopodial trunk extending through aperture to give rise to pseudopodia or to layer of cytoplasm that nearly completely envelops test; 1 to 150 spherical nuclei, many contractile vacuoles, elongate anastomosing pseudopodia with pronounced granular streaming; asexual reproduction by multiple fission. Fresh water and marine. Holocene; Europe (type species from bottle of water of unknown source). (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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