Lophoptychium is a subgenus of extinct lychniscosidan hexasterophoran sea sponge in the genus Coeloptychium.R. M. Finks, R. E. H. Reid, and J. K. Rigby. 2004. Porifera (Demospongea, Hexactinellida, Heteractinida, Calcarea). Treatise on Invertebrate Paleontology Part E, Revised E(3):1-872 [W. Kiessling/W. Kiessling/W. Kiessling] It is monotypic, being represented by the single species, Coeloptychium lobatum, the remains of which have been found in Santonian-Maastrichtian-aged deposits in Germany and Poland.Pomel, A. (1872). Paléontologie ou Description des animaux fossiles de la province d'Oran. Zoophytes. 5è Fascicule, Spongiaires. 1-256, pls I-XXXVI
References