[1] This fossil is also described from the Marwar Super Group [MSG] of rocks of Sonia Sandstone at Jodhpur region in Sursagar area.
[2] F. ukrainica seems to be represented by oval- elliptical-shaped fossils, that rarely ever become the same shape as F. oblonga, which are thought to show a short, protruding neck-like structure and/or a shallow sinus.
[1] Specimens which are less than 25 mm (0.98 in) are thought of as being juveniles, with its holotype being selected from a number of adult individuals that have been completely developed and show signs of the best preservation of the organism.
[1] The holotype for F. ukrainica is described as a convex oval-shaped form on the lower surface of a micaceous clayey, with very finely grained sandstone making up its slab.
[1] The holotype for F. oblonga also shows six longitudinal, low grooves and ridges across its body that also manifest gentle slopes about 3–4 mm (0.12–0.16 in) wide that run parallel to the margin of its structure and turn accordingly when they reach the terminations in the fossil.