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Pronunciation varies by accent · noun
(zoology) Any brachiopod of the superfamily Billingsellacea..
The Obolellida and the basic articulate stock, the billingsellaceans, appear later in the lower Cambrian. The orthide billingsellaceans with their strophic hinge lines, deltidiodont dentition and invariably calcareous shells, comprise two families which, although morphologically similar, have a fundamentally different style of shell secretion, reflected in their various descendants.
Use billingsellacean when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Billingsellacean means (zoology) Any brachiopod of the superfamily Billingsellacea..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
The Obolellida and the basic articulate stock, the billingsellaceans, appear later in the lower Cambrian. The orthide billingsellaceans with their strophic hinge lines, deltidiodont dentition and invariably calcareous shells, comprise two families which, although morphologically similar, have a fundamentally different style of shell secretion, reflected in their various descendants.
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