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Pronunciation varies by accent · noun
The initial part of a spiral shell, originating from a central chamber, in ammonoid molluscs.
The embryonic stage, consisting of a small ellipsoid protoconch and ammonitella, ends at about 0.6 mm.
Sure, ammonoid shells as a whole got progressively more coiled over the Devonian. But so did the tiniest part of each ammonoid shell, the ammonitella.
Use ammonitella when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Ammonitella means The initial part of a spiral shell, originating from a central chamber, in ammonoid molluscs.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
The embryonic stage, consisting of a small ellipsoid protoconch and ammonitella, ends at about 0.6 mm.
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