Hinde, G. J. (1896). Descriptions of new fossils from the Carboniferous Limestone. I. On Pemmatites constipatus, sp. nov., a lithistid sponge. II. On Palæacis humilis, sp. nov., a new perforate coral, with remarks on the genus. III. On the jaw-apparatus of an annelid, Eunicites reidiæ, sp. nov. <em>. Quarterly Journal of the Geological Society.</em> 52(1-4): 438-451, pls. 22-23.

new combination reference

Smyth, L. B. (1927). On the index fossil of the Cleistopora Zone. <em>Scientific Proceedings of the Royal Dublin Society, new series.</em> 18: 423-431, pls. 20-22.

additional source