C. elegans most commonly refers to the model round worm Caenorhabditis elegans. It may also refer to any of the species below. They are listed, first in taxonomic order (including synonyms) and, second, alphabetically.
Animals
Porifera (sponges)
Calcarea (calcareous sponges) Consobrinomia elegans, a species from the Mediterranean
Demospongiae (demosponges) Clathria elegans, a species of family Microcionidae found in the United States part of the North Atlantic Ocean Clathrissa elegans, a synonym for Tedania elegans, a species of family Tedaniidae found in Australia Crella elegans (syn. Cribella elegans or Cribrella elegans), a marine species of family Crellidae found in the Adriatic
Callyspongia elegans (syn. Cladochalina elegans), a species found in Indonesia Chalinissa elegans, a synonym for Callyspongia serpentina, a species found in Australia and New Zealand Chalinopsilla elegans, a synonym for Dactylia elegans, a species found in Western Australia
Chalinodendron elegans , a synonym for Haliclona elegans, a species found in southeast Australia
Carteriospongia elegans, a synonym for Carteriospongia foliascens, a species (Thorectidae)
Caulospongia elegans, a species of family Suberitidae found in Australia
Craniella elegans, a marine species of family Tetillidae found in southern India and Sri Lanka
†Cupulospongia elegans, an extinct species (incertae sedis) from the Cretaceous of France
Hexactinellida (glass sponges) †Cribrospongia elegans, an extinct species of family Cribrospongiidae from the Jurassic of Germany
Caulophacus elegans, a species (Rossellidae, Lanuginellinae) found in Central Kuroshio Current, near Japan Corbitella elegans, a species (Euplectellidae) found in the Banda Sea in the Maluku Islands of Indonesia
Cnidaria (cnidarians)
Hydrozoa (hydrozoans) Cryptolaria elegans, a synonym for Acryptolaria elegans, a thecate hydroid (Lafoeidae) found in the Gulf of Mexico
Anthozoa (corals, sea pens and gorgonians)
†Rugosa (rugose or horn corals) †Cardiaphyllum elegans, an extinct species from the Upper Carboniferous of China
Scleractinia (stony corals) †Calamophylliopsis elegans, a species (Dermosmiliidae) from the Cretaceous of China †Chorisastrea elegans, an extinct species (Calamophylliidae) found in Switzerland †Codonosmilia elegans, an extinct species (Rhipidogyridae) from the Jurassic of Switzerland Coeloria elegans, a species (incertae sedis) †Colpophyllia elegans, an extinct species (Mussidae) †Comophyllia elegans, an extinct species (Latomeandridae) from the Jurassic of France †Conosmilia elegans, an extinct species (Flabellidae) from the Tertiary of South Australia †Cyathophora elegans, a synonym for Holocystis elegans, a species (Cyathophoridae) from the Cretaceous of Mexico, Spain and the United Kingdom Cycloseris elegans, a mushroom coral (Fungiidae) found on the west coast of America
Stauriida †Carinthiaphyllum elegans, an extinct species (Geyerophyllidae) from the Carboniferous of China
†Tabulata (tabulate corals) †Caliapora elegans an extinct species (†Favositidae) from the Devonian of the Urals †Catenipora elegans, an extinct species (†Halysitidae) from the Silurian of Estonia †Coenites elegans, an extinct species (†Coenitidae) from the Devonian of Altai
Alcyonacea (soft corals) Callogorgia elegans (syn. Callicella elegans), a species (Primnoidae) found in the western North Pacific Chrysogorgia elegans, a species (Chrysogorgiidae) found in the Gulf of Mexico, the Mediterranean Sea and the North Atlantic Ocean Cyathopodium elegans, a species (Clavulariidae) found in the western part of the Atlantic Ocean
Pennatulacea (sea pens) Cavernularia elegans, a species (Veretillidae) from the North Atlantic Ocean
Myxozoa (myxozoans) Ceratomyxa elegans, a species (Ceratomyxidae) found in the Mediterranean and the Argentinian seas where it is a parasite of toadfishes
Echinodermata (echinoderms)
Asteroidea (sea stars) Calliaster elegans, a species †Comptonia elegans, an extinct species from the Cretaceous of France
†Chariaster elegans, an extinct species from the Cretaceous of Egypt
Crinoidea (crinoids) †Calceolispongia elegans, an extinct species (Calceolispongiidae) that lived along the shores of what corresponds to Timor and Western Australia today
†Cicerocrinus elegans, an extinct species (Pisocrinidae) known from the Silurian of the United Kingdom
Clarkometra elegans, a feather star (Colobometridae) found from southwest Mindanao in the Philippines to the Bonin Islands, Japan
Echinoidea (sea urchins) †Coelopleurus elegans, a species (Arbaciidae) from the Pleistocene of Japan
†Catopygus elegans, a synonym for Studeria elegans, an extinct species (Neolampadidae)
†Cidaris elegans Münster, 1826 (syn. †Cidarites elegans), a fossil species (Cidaridae) from the Jurassic of France Cidaris elegans (A. Agassiz, 1879), a synonym for Histocidaris elegans, an extant species (Histocidaridae)
†Edrioasteroidea (edrioasteroids) †Cambraster elegans, an extinct species (family unknown) from the Cambrian
Holothuroidea (sea cucumbers) †Chiridota elegans (syn. †Chirodota elegans), a species (Chiridotidae) from the Pliocene of Europe
Chordata (chordates)
Ascidiacea (ascidians or sea squirts) Clavelina elegans, a species (Clavelinidae) found in Japan
Chorizocarpa elegans, a synonym for Botryllus elegans, a species (Styelidae) found in Mozambique and South Africa Culeolus elegans, a species (Pyuridae) found in New Caledonia
Conodonta (conodonts) †Curtognathus elegans, an extinct species (Distacodontidae) from the Ordovician of Siberia
Osteostraci †Cephalaspis elegans, a synonym for †Zychaspis elegans, an extinct species (†Scolenaspididae) from the Devonian of Ukraine
Chondrichthyes (cartilaginous fishes) †Chomatodus elegans, a prehistoric species (Petalodontiformes)
Carcharias elegans, a synonym for Carcharhinus melanopterus, the blacktip reef shark, a requiem shark (Carcharhinidae) inhabiting the tropical coral reefs of the Indian and Pacific oceans
†Cladodus elegans, an extinct species from the Carboniferous period †Cladoselache elegans, an extinct shark from the Devonian period
†Ctenacanthus elegans, an extinct species (Ctenacanthidae) from the Carboniferous period
†Cosmacanthus elegans, a synonym for †Nemacanthus elegans, an extinct species (†Paleospinacidae) from the Triassic of Idaho, United States
Actinopterygii (ray-finned fishes)
Perciformes Callionymus elegans, a synonym for Callionymus lyra, the common dragonet, a species (Callionymidae) widespread in the eastern Atlantic Clinus elegans, a synonym for Calliclinus geniguttatus, a marine species (Labrisomidae) native to the Pacific coast of Chile and the Atlantic coast of Argentina Coryphaena elegans, a synonym for Luvaris imperialis, the louvar, a marine species (Luvaridae) found in surface waters of temperate and tropical oceans throughout the world Cybiosarda elegans, a marine scombrid (Scombridae) found in coastal and oceanic waters of northern Australia and southern New Guinea
Crenicara elegans, a synonym for Crenicara punctulatum, the checkerboard cichlid, a species (Geophaginae) native to creeks and rivers in the Amazon and Essequibo basins in South America Crenicichla elegans, a synonym for Crenicichla reticulata, a species (Cichlinae) native to South America
Cyprinodontiformes Cyprinodon elegans, the Comanche Springs pupfish, a species found in the United States
Cynodonichthys elegans, a species found in Colombia Cynolebias elegans, a synonym for Nematolebias whitei, the Rio pearlfish, a species native to South America
Cobitis elegans, a synonym for Triplophysa stolickai, the Tibetan stone loach, a species found in southern and central Asia
Siluriformes (catfishes) Corydoras elegans (syn. Corydorus elegans), the elegant corydoras or elegant catfish, a freshwater armored catfish (Callichthyidae) found in the Upper Amazon River basin
Cypriniformes Crossocheilus elegans, a cyprinid (Cyprinidae) found in northern Borneo, Indonesia
Characiformes Curimata elegans or Curimatus elegans, synonyms for Steindachnerina elegans, a species found in rivers in Bahia and Minas Gerais, Brazil Curimatus elegans paraguayensis, a synonym for Curimatella dorsalis, a species from the Orinoco, Amazon, Tocantins and Paraguay-lower Paraná River basins
Scorpaeniformes Centridermichthys elegans, a synonym for Bero elegans, a sculpin (Cottidae) native to the northwestern Pacific Ocean
Salmoniformes Coregonus elegans, a synonym for Coregonus pollan, the pollan, a freshwater whitefish (salmonidae) known only from five Irish lakes
Sarcopterygii (lobe-finned fishes) †Ceratodus elegans, an extinct lungfish (Ceratodontiformes, Ptychoceratodontidae) from the Triassic of Germany †Coelacanthus elegans, a synonym for Rhabdoderma elegans, an extinct coelacanth fish (Rhabdodermatidae) that lived in the Carboniferous
Lissamphibia (amphibians) Cardioglossa elegans, a species (Arthroleptidae) found in Cameroon, Equatorial Guinea and Gabon Cornufer elegans, a species (Ceratobatrachidae) endemic to Papua New Guinea
Aves (birds) †Chlorostilbon elegans, Gould's emerald, a presumed extinct hummingbird (Trochilidae) likely from Jamaica or the Bahamas Charadrius elegans, a synonym for Charadrius alexandrinus, the Kentish plover, a cosmopolitan species (Charadriidae) Callipepla elegans, a synonym for Callipepla douglasii, the elegant quail, a species (Odontophoridae) endemic to Pacific-slope thorn forest of northwestern Mexico Coturnicops elegans, a synonym for Sarothrura elegans, the buff-spotted flufftail, a species (Sarothruridae) found in Africa Calocitta elegans, a synonym for Calocitta colliei, the black-throated magpie-jay, a species (Corvidae) found in northwestern Mexico Celeus elegans, the chestnut woodpecker, a species (Picidae) found in South America Calodromas elegans or Calopezus elegans, synonyms for Eudromia elegans, the elegant crested tinamou or martineta tinamou, a species (Tinamidae) found in southern Chile and Argentina
Reptilia (reptiles)
Serpentes (snakes)
Calamaria elegans, a synonym for Calamaria modesta, a colubrid species (Calamariinae) found in Java Coronella elegans Günther, 1858, a synonym for Taeniophallus occipitalis, a colubrid species (Dipsadinae) found in South America Coronella elegans Jan, 1863, a synonym for Meizodon regularis, the eastern crowned smooth snake, a colubrid species (Colubrinae) found in Africa
Coluber elegans, a synonym for Psammophis elegans, the elegant sand racer, a species (Lamprophiidae) found in tropical Africa
Craspedocephalus elegans, a synonym for Trimeresurus elegans, the elegant pitviper, a species (Viperidae) endemic to Japan
Cursoria elegans or Cusoria elegans, synonyms for Eryx elegans, a species (Boidae) found in western Central Asia
Gekkonidae (geckos)
Coleonyx elegans, the Yucatán banded gecko, an eyelid gecko (Eublepharinae) found in Mexico, Guatemala and Belize Cyrtopodion elegans, a synonym for Cyrtopodion elongatum, the Yangihissar gecko, a species (Gekkoninae) found in northwest China and Mongolia
Testudines (turtles)
Chersine elegans, a synonym for Geochelone elegans, the Indian star tortoise, a species (Testudinidae) found in dry areas and scrub forest in India and Sri Lanka Chrysemys elegans, a synonym for Trachemys scripta elegans, the red-eared slider, a pond turtle (Emydidae) Cyclanorbis elegans, the Nubian flapshell turtle, a softshell (Trionychidae) found in Africa
Pseudosuchia
†Chatterjeea elegans, a synonym for †Shuvosaurus inexpectatus, an extinct species of beaked reptiles (†Shuvosauridae) from the Late Triassic of Texas
†Cricosaurus elegans, an extinct marine crocodyliform (Metriorhynchidae) from the Late Jurassic to Early Cretaceous
†Pterosauria