T. centrostrigeata ( Fig. 1A) was of medium size and displayed structures characteristic of this species, referred to as centre ridges. The anterior margin passed beyond the y + 1 axis. The anterior and posterior margins were nearly straight and were parallel with each other. The posterior margin presented an L-shape. Blade apophysis was always present. The central portion exhibited a conic or triangular format and barely extended beyond the y axis. The rays extended considerably beyond the y + 1 axis.