An elasmosaurid sensu Brown (1993, p. 13). Unique and potentially apomorphic characters include: wide space between the orbit and external naris, clavicular arch with posterior extension of interclavicle, prominent femoral muscle scar projecting posteriorly. The following characters are not unique but useful to distinguish F. suzukii from related forms: external naris above the fifth maxillary tooth (more anterior in Libonectes, Terminonatator and Tuarangisaurus); concavity at the ventral edge of the orbit (convex in Styxosaurus, Thalassomedon and Tuarangisaurus); ventral notch in the posterior cervicals (absent in Libonectes, Hydralmosaurus and Thalassomedon), large median notch at the anterior edge of the clavicular arch (absent in Callawayosaurus, Libonectes, Morenosaurus, Styxosaurus and Thalassomedon) and in the pubis (smaller in Mauisaurus), humerus much longer than femur (not so long in all other elasmosaurids except Callawayosaurus), and epipodials long relative to the width and the length of propodials (unique among Late Cretaceous elasmosaurs

Sato, Tamaki et. al. (2006) A new elasmosaurid plesiosaur from the Upper Cretaceous of Fukushima, Japan;; Palaeontology, 49(3), pp.467-484