Bibliography
Source: Catalogue of Life
5 results
Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. |
extinct group. |
Museum Victoria KEmu database (Oct. (2006). |
Neave, S. A. and successors. (1939-2004). Nomenclator Zoologicus, vols. 1-10 online. [developed by uBio, hosted online at MBLWHOI Library]. Previously at http://ubio.org/NomenclatorZoologicus/ (URL no longer current). |
Izv. Acad. Sci. Kazakhstan SSR., no. 119 (Geol. Ser. no. 15) |
Citation
†Semicyclocephalus Ivshin, 1952 in undefined