Strophomenata - Productida - Productellidae

Alternative combinations: Krotovia opuntia, Productus (Avonia) opuntia, Productus (Pustula) opuntia, Productus opuntia

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 Echinauris according to L. Angiolini and L. Carabelli 2010

Sister taxa: Echinauris bella, Echinauris boulei, Echinauris circularis, Echinauris crassa, Echinauris doulingensis, Echinauris huehuetenanguensis, Echinauris interrupta, Echinauris irregularis, Echinauris lappacea, Echinauris lateralis, Echinauris liumbona, Echinauris magna, Echinauris parva, Echinauris productelloides, Echinauris subhorrida, Echinauris subquadrata, Echinauris venustula, Echinauris zhexiensis

Average measurements (in mm): shell 11.8 x 14.5, valve 10.3 x 11.3