Phormospyris designation Richard N. Benson (17/12/2003)
Other than the illustration of this species by Renz (1974, pl. 19, fig.11), who named it Dendrospyris sp. aff. D. binapteronis, I have not found any other illustrations in the literature available to me that resemble this species from the Gulf of California. As it resembles other species of Phormospyris, I have designated it Phormospyris sp. Goll (1968, text-fig. 8) indicates that D. binapteronis became extinct near the end of the Pliocene.