Festucula robusta is a species of spider in the family Salticidae. It is endemic to South Africa and is commonly known as robust grass jumping spider.
Festucula robusta is found in Gauteng and KwaZulu-Natal provinces in South Africa
Festucula robusta inhabits Grassland and Savanna biomes at altitudes ranging from 296 to 1114 m.
The species was sampled from grasses.
Compared to other Festucula species, F. robusta is larger in body size.
Festucula robusta is listed as Data Deficient by the South African National Biodiversity Institute due to its small range. Only one other record from KwaZulu-Natal is known. The status of the species remains obscure and some more sampling is needed to determine its range.
Festucula robusta was described by Azarkina and Foord in 2014 from Kromdraai, Krugersdorp in Gauteng.