Pseudobangia kaycoleia is a species of filamentous red algae of the family Bangiaceae described in 2005.
The species of alga's unbranched, erect thalli may reach up to 1 centimeter in length. The filaments are 29.4 to 49.0 micrometres wide, while the filaments range from 34.3 (three cells wide) to 83.3 (seven cells wide) micrometers.