Cephalopoda - Ammonitida - Stephanoceratidae
Alternative spelling: Orthogarantiana
Parent taxon: Garantiana according to M. R. Majidifard 2015
See also Arkell et al. 1957, Besnosov and Mitta 1993 and Sepkoski 2002
Sister taxa: Garantiana (Garantiana), Garantiana (Hlawiceras), Garantiana (Pseudogarantiana), Garantiana alticosta, Garantiana asarjani, Garantiana baculata, Garantiana bentzi, Garantiana coronata, Garantiana depressa, Garantiana garantiana, Garantiana pompeckji, Garantiana praegarantiana, Garantiana quenstedti, Garantiana subgaranti, Garantiana tetragona, Odontolkites longidoides, Praeparkinsonia tschaloica, Praeparkinsonia subbaculata
Subtaxa: Garantiana (Orthogarantiana) densicostata Orthogarantiana (Orthogarantiana) Orthogarantiana (Torrensia)
Distribution:
• Jurassic of France (1 collection), Iran (1), the Russian Federation (4), Turkmenistan (3)
Total: 9 collections including 12 occurrences