Description of Pannellainidae
provided by BioPedia
Discorbacean foraminifera, test tiny, planoconvex, 7-9 chambers per whorl, chambers aligned with those of the preceding whorl, sutures strongly elevated and costate on the spiral side; aperture umbilical.
Diagnosis
provided by World Register of Marine Species
Test a low trochospiral, chambers of successive whorls aligned so that septal ridges extend from the apex to the periphery on the spiral side. Oligocene to Holocene. (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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