Simonsenia bifurcata Tremarin Simonsenia bifurcata Tremarin in Fottea 24(1): 65, fig. 15-32. 12 Mar 20241Holotype: Brazil, Pará, Belém, Murutucu island, 1°29'9"S, 48°25'52"W, Jul 2003, F. Ferrari & P.I. Tremarin s.n. (UPCB: 58045)21. Etymology: The species name refers to the typical bifurcation of transversal ribs of the valve, 2. Fig. 17, 18 illustrate the holotype