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Test in the more primitive forms planospiral in the young,later becoming biserial, in the more specialized genera the spiral stage and even the biserial stage may be wanting and the rela-tionships shown by other characters; well calcareous, perforate, ornamentation in higher genera bilaterally symmetrical; aperture when simple, usually large for the size of the test, withoutteeth, in.some forms with apertural neck and phialine lip.
Heterohelicidae compiled by the pforams@mikrotax project team viewed: 13-6-2021
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