362 The Genus Heliophyllum in the upper Middle Devonian (Givetian)The Genus Heliophyllum (Anthozoa Rugosa) in the upper Middle Devonian (Givetian) BAP #362 Specimens of the genus Heliophyllum are among the most common components of the upper Middle Devonian coral fauna (Givetian: Hamilton Group and Tully Limestone) in New York State. Although these corals are abundant and widespread, examination of large numbers of specimens indicates that most of them belong in a single, variable species. H. halli Milne Edwards and
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362 The Genus Heliophyllum in the upper Middle Devonian (Givetian)