Astacidea is a group of decapod

Decapoda

The decapods or Decapoda are an order of crustaceans within the class Malacostraca, including many familiar groups, such as crayfish, crabs, lobsters, prawns and shrimp. Most decapods are scavengers. It is estimated that the order contains nearly 15,000 species in around 2,700 genera, with...

 crustaceans including lobster

Lobster

Clawed lobsters comprise a family of large marine crustaceans. Highly prized as seafood, lobsters are economically important, and are often one of the most profitable commodities in coastal areas they populate.Though several groups of crustaceans are known as lobsters, the clawed lobsters are most...

s, crayfish

Crayfish

Crayfish, crawfish, or crawdads – members of the superfamilies Astacoidea and Parastacoidea – are freshwater crustaceans resembling small lobsters, to which they are related...

 and their close relatives. It comprises five extant superfamilies, two of crayfish

Crayfish

Crayfish, crawfish, or crawdads – members of the superfamilies Astacoidea and Parastacoidea – are freshwater crustaceans resembling small lobsters, to which they are related...

 (Astacoidea and Parastacoidea), one of true lobster

Lobster

Clawed lobsters comprise a family of large marine crustaceans. Highly prized as seafood, lobsters are economically important, and are often one of the most profitable commodities in coastal areas they populate.Though several groups of crustaceans are known as lobsters, the clawed lobsters are most...

s (Nephropoidea), one of reef lobster

Reef lobster

Reef lobsters, Enoplometopus, are a genus of small lobsters that live on reefs in the Indo-Pacific, Caribbean and warmer parts of the east Atlantic Ocean.-Description:...

s (the genus Enoplometopus), and a number of fossil taxa. , the group contains 782 recognised species, over 400 of which are in the family Cambaridae

Cambaridae

Cambaridae is the largest of the three families of freshwater crayfish, with over 400 species. Most of the species in the family are native to North America east of the Great Divide, such as the invasive species Procambarus clarkii and Orconectes rusticus, with fewer species living in East Asia and...

.

Taxonomy

• Palaeopalaemonoidea †
  • Palaeopalaemonidae †
• Enoplometopoidea
  • Enoplometopidae
  • Uncinidae †
• Nephropoidea
  Nephropoidea
  Nephropoidea is a superfamily of decapod crustaceans. It contains the true lobsters in the Nephropidae , and three fossil families: Chilenophoberidae, Protastacidae and Stenochiridae. Their closest relatives are the reef lobsters....
  
  
  • Chilenophoberidae †
  • Nephropidae
  • Protastacidae †
  • Stenochiridae †
• Astacoidea
  • Astacidae
    Astacidae
    The family Astacidae comprises the freshwater crayfish native to Europe and western North America. It is made up of three genera. Pacifastacus is found on the Pacific coast of the United States and British Columbia and includes the signal crayfish and the Shasta crayfish...
    
    
  • Cambaridae
    Cambaridae
    Cambaridae is the largest of the three families of freshwater crayfish, with over 400 species. Most of the species in the family are native to North America east of the Great Divide, such as the invasive species Procambarus clarkii and Orconectes rusticus, with fewer species living in East Asia and...
    
    
  • Cricoidoscelosidae †
• Parastacoidea
  • Parastacidae
    Parastacidae
    Parastacidae is the family of freshwater crayfish found in the southern hemisphere. The family is a classic Gondwana-distributed taxon, with extant members in South America, Madagascar, Australia, New Zealand and New Guinea, and extinct taxa also in Antarctica.Three genera are to be found in Chile,...