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Hallopora
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Hallopora elegantula, middle Silurian in age, collected from the Rochester Shale, Lockport, N.Y. Silurian coral-stromatoporoid community Silurian Pentamerus community
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Hallopora elegantula, middle Silurian in age, collected from the Rochester Shale, Lockport, N.Y.
Hallopora elegantula, middle Silurian in age, collected from the Rochester Shale, Lockport, N.Y.

Hallopora

fossil bryozoan genus
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Hallopora, genus of extinct bryozoans (moss animals) found as fossils in Ordovician to Silurian marine rocks (from 505 to 408 million years old). Hallopora is distinguished by the large size of its pores and by its internal structure. Various species of Hallopora are known, some of them useful for stratigraphic correlation.