What is "robustus"

Robustus, robust in Latin, may refer to:

• Atheris squamiger robustus, a subspecies in the species Atheris squamigera, the green bush viper, variable bush viper or leaf viper, a venomous viper species found in west and central Africa
• Cebus nigritus robustus, a subspecies in the species Cebus nigritus, the black capuchin, a monkey from the Atlantic Forest in south-eastern Brazil and far north-eastern Argentina
• Paranthropus robustus, an extinct species of hominine, was also previously mistakenly referred to as Australopithecus robustus. While Paranthropus is a genus in the Australopithecine subtribe, it is a separate genus from Australopithecus itself.