This is a species Anthurium antolakii (BVEP). This individual is the result of a cross between 'Round' and 'RA1' by Grant Abadal (@granthuriums, USA). Has a very flat leaf blade and ectremely dark colors.

Rioclaroense × is a wild hybrid, suspected to involve a species from section Xialophyllium. Wild Anthurium hybrids are uncommon, and cross-sectional ones are considered particularly rare. The plant was discovered by Jay Vannini.