Under the infraorder Anomura there are seven extant superfamilies wherein squat lobsters are considered to belong into two families: Chirostyloidea and Galatheoidea.
The infraorder Anomura contained seven extant superfamilies: Aegloidea Chirostyloidea squat lobsters  Eocarcinoidea Galatheoidea squat lobsters
porcelain crabs Hippoidea Lithodoidea Lomisoidea Paguroidea 
