Indeed, my understanding of these plants is that they CAN generate viable
seed without manual fertilization. I am aware of at least two Anthurium spp.
that often generate seed thusly - A. clarinervium & A. papillilaminum.
Surely, there are many more.
With regard to Claude Sweet's comment - it is worth noting that both of
these Anthuriums have been utilized by aroid hybridizers for some time, and
that the former species is suspected of being one of the parents of A.
leuconeurum. I have manually pollinated both of the above, and have
generated viable seed either way.