TY. If I've been informed correctly, all Anthuriums have a geniculum, as do Spathiphyllums, Monsteras.
Trying to investigate, one encounters picture-less paragraphs like this:
http://e-monocot.org/taxon/urn...
Philo swartiae:
https://www.chicagobotanic.org...
Trying to find a pic of a Philodendron geniculum has proved fruitless. Reading the descriptions, they don't all have the distinct line that can be so noticeable on Anthurium.