? Anomura or Anomala
Hermit crab
Scientific classification
Kingdom: Animalia Phylum: Arthropoda Class: Malacostraca Order: Decapoda Suborder: Pleocyemata Infraorder: Anomura MacLeay, 1838
Superfamilies
Lomisoidea Lomisidae Paguroidea Coenobitidae Diogenidae Lithodidae Paguridae Parapaguridae Galatheoidea Aeglidae Chirostylidae Galatheidae Kiwaidae Porcellanidae Hippoidea Albuneidae Hippidae

Anomura (sometimes Anomala) are a group of decapod crustaceans, including hermit crabs and others. Although the names of many anomurans includes the word crab, all true crabs are in the sister group to the Anomura, the Brachyura (the two groups together form the clade Meiura). Image File history File links Download high resolution version (1832x1196, 2193 KB)Hermit crab From: http://www. ... Hermit crabs are decapod crustaceans of the infra-order Paguroidea, distinct from the true crabs in the infra-order Brachyura. ... Scientific classification or biological classification is how biologists group and categorize extinct and living species of organisms. ... Phyla Porifera (sponges) Ctenophora (comb jellies) Cnidaria (coral, jellyfish, anemones) Placozoa (trichoplax) Subregnum Bilateria (bilateral symmetry) Acoelomorpha (basal) Orthonectida (parasitic to flatworms, echinoderms, etc. ... Subphyla and Classes Subphylum Trilobitomorpha Trilobita - Trilobites (extinct) Subphylum Chelicerata Arachnida - Spiders, Scorpions, etc. ... Orders Subclass Eumalacostraca  Superorder Eucarida   Order Amphionidacea   Order Decapoda - crabs, shrimp   Order Euphausiacea - krill  â€ Superorder Pancarida   â€ Order Thermosbaenacea  Superorder Peracarida   Order Amphipoda - amphipods   Order Cumacea - cumaceans   Order Isopoda - pillbugs, sowbugs   Order Lophogastrida   Order Mictacea   Order Mysida   â€ Order Spelaeogriphacea   Order Tanaidacea  Superorder Syncarida   Order Anaspidacea   Order Bathynellacea   â€ Order Palaeocaridacea   Order Stygocaridacea... Suborders and Infraorders Dendrobranchiata Pleocyemata Caridea Stenopodidea Reptantia, comprising: Eryonoidea Achelata Astacidea Glypheidea Thalassinidea Anomala Brachyura The decapods or Decapoda are a group of crustaceans within the class Malacostraca, including many familiar groups of crustaceans, such as crabs, lobsters and shrimp, but also some families that are less well known. ... Infraorders Caridea Stenopodidea Reptantia, divided into: Polychelida Achelata Glypheoidea Astacidea Thalassinidea Anomala Brachyura Pleocyemata is a sub-order of decapod crustaceans, erected by Martin Burkenroad in 1963. ... | Jöns Jakob Berzelius, discoverer of protein 1838 was a common year starting on Monday (see link for calendar). ... Hermit crabs are decapod crustaceans of the infra-order Paguroidea, distinct from the true crabs in the infra-order Brachyura. ... Genera Birgus Coenobita Coenobitidae are a family of hermit crabs with only two genera: Birgus (Leach, 1816), the coconut crab, and Coenobita (Latreille, 1825), a genus of terrestrial hermit crabs centred in the Indian and Pacific Oceans, but also extending to the Atlantic Ocean and the Red Sea. ... Genera Acantholithodes Cryptolithodes Dermaturus Glyptolithodes Hapalogaster Lithodes Lopholithodes Neolithodes Oedignathus Paralithodes Paralomis Phyllolithodes Placetron Rhinolithodes King crabs, also called stone are a family of crab-like decapod crustaceans chiefly found in cold seas. ... Families and genera Chirostylidae Chirostylus Ortmann, 1892 Eumunida Smith, 1883 Gastroptychus Caurelly, 1896 Pseudomunida Uroptychus Baba, 1988. ... Families and genera Chirostylidae Chirostylus Ortmann, 1892 Eumunida Smith, 1883 Gastroptychus Caurelly, 1896 Pseudomunida Uroptychus Baba, 1988. ... Binomial name Kiwa hirsuta Macpherson, Jones & Segonzac, 2006 Kiwa hirsuta (also known as the Hairy lobster [1] or Yeti crab [2]) is a crustacean discovered in 2005 in the South Pacific Ocean. ... Genera Aliaporcellana Capilliporcellana Clastotoechus Euceramus Enosteoides Eulenaios Lissoporcellana Megalobrachuium Minyocerus Neopetrolisthes Neopisoma Pachycheles Parapetrolisthes Petrolisthes Pisidia Polyonyx Porcellana Porcellanella Pseudoporcellanella Raphidopus Ulloaia Porcelain crabs are decapod crustaceans in the family Porcellanidae, which superficially resemble true crabs. ... Suborders and Infraorders Dendrobranchiata Pleocyemata Caridea Stenopodidea Reptantia, comprising: Eryonoidea Achelata Astacidea Glypheidea Thalassinidea Anomala Brachyura The decapods or Decapoda are a group of crustaceans within the class Malacostraca, including many familiar groups of crustaceans, such as crabs, lobsters and shrimp, but also some families that are less well known. ... Classes Remipedia Cephalocarida Branchiopoda Ostracoda Maxillopoda Malacostraca The crustaceans (Crustacea) are a large group of arthropods (55,000 species), usually treated as a subphylum. ... Hermit crabs are decapod crustaceans of the infra-order Paguroidea, distinct from the true crabs in the infra-order Brachyura. ... Sections Dromiacea Raninoida Heterotremata Thoracotremata The term crab is often applied to several different groups of short (nose to tail) decapod crustaceans with thick exoskeletons, but only members of the Brachyura are true crabs; other taxa, such as hermit crabs, porcelain crabs, king crabs, and horseshoe crabs are, despite superficial... A clade is group of organisms which share a common ancestor and which includes all decendents of that ancestor. ...

The name Anomala reflects the unusual variety of forms in this group; whereas all crabs share some obvious similarities, the various groups of anomurans are quite dissimilar. The name Anomura derives from an old classification in which reptant decapods were divided into Macrura (long-tailed), Brachyura (short-tailed) and Anomura (differently-tailed). The Reptantia is a group of decapod crustaceans, including lobsters, crabs and many other well-known creatures. ...

As decapods (meaning ten-legged), Anomurans have ten pereiopods, but the last pair of these is often hidden inside the gill chamber (under the carapace) and is used for keeping the gills clean. Since this arrangement is never found in true crabs, a "crab" with only eight pereiopods must be an Anomuran. Antennules Pereiopods Carapace Pleopods Uropods Telson The body of a decapod crustacean is made up of nineteen body segments grouped into two main body parts, the cephalothorax and the abdomen. ... The term carapace refers to a dorsal section of an exoskeleton or shell, in a number of animal groups. ... Sections Dromiacea Raninoida Heterotremata Thoracotremata The term crab is often applied to several different groups of short (nose to tail) decapod crustaceans with thick exoskeletons, but only members of the Brachyura are true crabs; other taxa, such as hermit crabs, porcelain crabs, king crabs, and horseshoe crabs are, despite superficial...

The Infraorder Anomura is divided into four superfamilies:

• Lomisoidea - contains a single family, which contains a single species - Lomis hirta, the Hairy Stone Crab
• Hippoidea - containing the two families of mole crabs, Hippidae and Albuneidae
• Galatheoidea - containing squat lobsters and related animals in five families: Galtheidae (squat lobsters), Chirostylidae (squat lobsters), Porcellanidae (porcelain crabs), Aeglidae (a small group of South American freshwater anomurans with no common name in English), and Kiwaidae, containing the newly-discovered Kiwa hirsuta.
• Paguroidea - hermit crabs and their relatives: Coenobitidae, Diogenidae, Paguridae, Parapaguridae, Pylochelidae, and the king crabs or stone crabs in the Lithodidae)

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Anomura