One of the more unusual looking pieces I found in the Martin formation of Arizona was a piece that resembles Alveolites sp. It is a flat topped piece with an epitheca on the underside and what appears to be a vertical growth element so that, in profile, it looks a little like a mushroom. The corallite openings on the dorsal surface are the most telling. They appear to be laying on their side and shaped a little like a fish scale. This is a diagnostic feature of Alveolites which is what leads me to believe my piece is of the same genus. The genera is listed by Teichert in his paper and illustrated in Langland's article.
This specimen is from the Jerome member of the Martin formation (Devonian, Fransian stage) north of Payson, AZ.
Teichert, C., 1965, "Devonian Rocks and Paleogeography of Central Arizona", USGS Professional Paper 464
Langland, Jeffrey O. and Edith V., 2012, "Fauna of a 400-Million-Year-Old Coral Reef in
Arizona", Rocks and Minerals, 87:1, 40-44
Stumm, Erwin C., 1948, "Upper Devonian Compound Tetracorals from the Martin Limestone", Journal of Paleontology, Vol. 22:1, pp. 40-47