Atrypa
noun
Atry·pa
ə‧ˈtrīpə
: a genus of extinct Silurian and Devonian plicate-shelled or costate-shelled brachiopods having the plates of the brachidium produced into spirally rolled processes with the apices usually directed toward the plane of symmetry of the valve
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“Atrypa.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/Atrypa. Accessed 28 Nov. 2024.
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