Strophomenata - Productida - Productidae

Alternative combinations: Productus (Dictyoclostus) vishnu, Productus vishnu

Full reference: W. Waagen. 1884. Productus Limestone Fossils, Part IV, fas. 4. Salt Range Fossils, Palaeontologia Indica, Series 13 1(4):611-728

Belongs to Costiferina according to H. Muir-Wood and G. A. Cooper 1960

Sister taxa: Costiferina alata, Costiferina arata, Costiferina indica, Costiferina miaolingensis, Costiferina minor, Costiferina redacta, Costiferina spiralis, Costiferina subcostata, Costiferina thomasi, Costiferina wadei

Average measurements (in mm): valve 55.0 x 60.0