Chondrichthyes - Hexanchiformes - Hexanchidae

Alternative combination: Squalus cepedianus

Synonyms: Heptranchias plectrodon Cope 1867, Notidanus plectrodon Cope 1867

Belongs to Notorynchus according to A. K. Hastings and A. C. Dooley 2017

See also Cope 1868, Hay 1902 and Purdy et al. 2001

Sister taxa: Notorynchus maculatus, Notorynchus thevenardi

Distribution: found only at James T. Thomas estate (Miocene of Maryland)

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Specimen images are retrieved through the ePANDDA API.