T. centrostrigeata (Fig. 1A) was of medium size and displayed
structures characteristic of this species, referred to as centre ridges.The anteriormargin passed beyond the y+1 axis. The anterior and posterior
margins were nearly straight and were parallel with each other.
The posteriormargin presented an L-shape. Blade apophysiswas 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.